Model Boat Mayhem - Forum

Dry Dock / Shipyard: Builds & Questions => Working Vessels => Topic started by: Tafelspitz on February 25, 2017, 03:39:10 PM

Title: Building the CalderCraft Imara
Post by: Tafelspitz on February 25, 2017, 03:39:10 PM
Well, my Imara kit finally arrived today  :}
As I promised earlier, I'm gonna try and keep a building blog in this here thread.


Today was unpacking day and oh my dog, where are all these parts, bits and pieces supposed to go eventually... what have I gotten myself into?  ok2



Title: Re: Building the CalderCraft Imara
Post by: Baldrick on February 25, 2017, 04:33:45 PM



No plans or instructions  ?  looks interesting  {:-{
Title: Re: Building the CalderCraft Imara
Post by: T33cno on February 25, 2017, 10:30:19 PM
Love it and will watch with great interest :-))
I guess you've gone for twin props?
Title: Re: Building the CalderCraft Imara
Post by: oldiron on February 26, 2017, 03:15:34 AM
Will be atching. thanks to Irishcarguy I've got a kit myself. Will be starting it next winter.

John
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on February 26, 2017, 08:27:32 AM
No plans or instructions  ?  looks interesting  {:-{


Yes, there are plans and instructions. Otherwise I'd be completely lost  :embarrassed:


Love it and will watch with great interest :-))
I guess you've gone for twin props?


Thank you! Yes, it's the twin prop version with a twin steam engine for better maneuverability.


Speaking of the steam engine, I just unboxed it and had a closer look at the parts. Very exciting and a wonderful piece of engineering. Brings the golden age of steam into the 21st century  O0









Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on February 26, 2017, 09:12:23 AM
Good evening....may we call you Tafel?

The Imara kit is certainly a complex build assembly and a number of beautifully completed models are available on the WEB for reference and inspiration :-))

Opening up the world of controlling two reversible twin cylinder steam engines [PICCOLO] will pose many questions, however a number of members here will openly offer helpful constructive advice   O0...... Regner model steam components are world renown  ;) ....... for quality in their respective ranges

One interestingly point is there appears to be an individual de-oiler/condenser [REG40453] per engine :o........

The boiler water, or gas tank capacity will dictate run times and hence oiler water discharge requirements 

Many will look forward to your build and do not hesitate to ask any questions......

Derek
Title: Re: Building the CalderCraft Imara
Post by: Will01 on February 26, 2017, 08:26:09 PM
Very nice, this will be interesting to follow
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on February 26, 2017, 08:26:45 PM
Good evening....may we call you Tafel?


Hello Derek, and thank you for stopping by!
You may also call me Dominik, or Dom, which is my real life name  ;)

Quote
Opening up the world of controlling two reversible twin cylinder steam engines [PICCOLO] will pose many questions, however a number of members here will openly offer helpful constructive advice   O0


Yes, that will certainly be an interesting point once I get there. Shhhhh, can you hear an RC kit with a proportional mixer coming up somewhere in the not too distant future?
%%
Quote
One interestingly point is there appears to be an individual de-oiler/condenser [REG40453] per engine :o ........


Yes, there are indeed two of these, and according to the manual that came with the kit, that's the way it is supposed to be. Is that unusual?
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on February 26, 2017, 11:59:47 PM
Hi Dom,

The pewter castings look very nice indeed. I hope they have no 'stepping' and that the mould lines are minimal. It makes cleaning up so much easier.

A tip for filing or 'fettling' pewter and white metal is to rub some talc into the teeth of the file first as this helps prevent them from getting clogged up with pewter that you then have to pick out unless you have a file rake.

This will be another good topic to follow in the late Winter and into Spring. I hope that the Summer will be fine for when you get her on the water for ballast and running tests.

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on February 27, 2017, 08:15:08 AM
The pewter castings look very nice indeed. I hope they have no 'stepping' and that the mould lines are minimal. It makes cleaning up so much easier.


Well, most of them look decent enough, but the A-Frames for the prop shafts have some substantional mould lines. I cleaned them up using my Dremel and a rotary polishing tool, but there are some areas I couldn't reach with it that are going to need some manual attention.

[/size]
Quote
A tip for filing or 'fettling' pewter and white metal is to rub some talc into the teeth of the file first as this helps prevent them from getting clogged up with pewter that you then have to pick out unless you have a file rake. [/size]


Some very useful advice there, thank you! I just added baby powder to my shopping list :-))

Title: First Drilling
Post by: Tafelspitz on February 27, 2017, 08:54:58 PM
I did it, I just drilled the first couple of holes. Scary stuff  :o


The two A-frames have very tiny supports and they aren't of equal size (probably due to substantial mould lines which had to be removed), so the holes for the screws are a tight fit. I'll probably need to get smaller diameter screws to get them in unconstrained. The supplied batch is 3,5 mm-somethingish (I suppose some weird english imperial screw size  ok2 ), so I will probably get some 3,0 mm screws which will get me some more wiggle room.
So far I have only drilled one of the four holes to put things tentatively together.


Drilling the holes for the drive shafts into the GFK hull was a breeze with the Dremel milling cutter.



Title: Some more supplies
Post by: Tafelspitz on March 03, 2017, 05:59:53 PM
Just a short update (as a lengthy note I just wrote has been eaten by the forum I'm afraid  >:-o  ).


Bought a couple of accessories today but some more are needed since the shop I went to didn't have everything I had on my list.


In the dry docks nothing much has happened, I rubbed her bottom down a bit but some more work and body filler is still needed.
I shortened the lower rudder support to the needed length. This mould is a bit misshapen, to say the least, and will need some rubbing once installed in place.


Title: Re: Building the CalderCraft Imara
Post by: T33cno on March 03, 2017, 10:06:23 PM
Thanks keep it going  :-))
I'm a bit disappointed with the lack of quality of the Caldercraft fittings. How hard can it be to make these  :((
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on March 03, 2017, 10:32:00 PM
One problem with these older kits is that the moulds tend to wear out and are not refreshed so the fittings lose their definition. With things like the keel extension as shown above I prefer to use the supplied fitting as a pattern and fabricate a copy in something more robust such as brass. I also discard things like immensely heavy white metal rudders and fabricate a replacement in brass with stuck on plywood or metal strip detail. If the rudder needs to be contoured then make the basic plate in brass and build up the shape with car filler. The result is much lighter.

Colin
Title: Drive Shaft Supports and Rudder
Post by: Tafelspitz on March 06, 2017, 08:21:52 PM
I'm a bit disappointed with the lack of quality of the Caldercraft fittings. How hard can it be to make these  :((


Yeah, well. All in all they don't look so bad, it's just with these couple of bigger (and mechanically important) parts, maybe I just had an unlucky batch. However, there are some other, um, difficulties, of which I will tell you in a minute.


With things like the keel extension as shown above I prefer to use the supplied fitting as a pattern and fabricate a copy in something more robust such as brass. I also discard things like immensely heavy white metal rudders and fabricate a replacement in brass with stuck on plywood or metal strip detail.


Thank you for your input (and for your immensely helpful review from back when which I frequently refer to  O0 ).
I agree that the keel extension may benefit from a replacement and I already ordered some stuff to give it a try. I ordered a piece of brass and a needle roller bearing for the rudder axle. I'm not sure whether I'll come up with something useful with that stuff, but in case of failure I still have the original parts.

I don't see the problem with the rudder blade and in fact like the heavy build of that thing. I bought a couple of high torque servos anyway, so this shouldn't be an issue as long as it runs smoothly in its supports.


As for the drive shaft support A-frames - they are all over the place, shape-wise. When I first tentatively mounted them, there was a difference of approx. 6 mm when measured from the stern. This will not do.
I mounted them onto a piece of scrap wood, carefully warmed them with a hair dryer to make the metal a bit soft and then carefully, softly bent it like Beckham (see image below).
I proceeded likewise for the other A-frame, albeit in the opposite direction.
After two rounds of re-mounting, measuring and more bending, they were almost spot-on, if slightly bent. But that's the price I have to pay to have the propellers in perfect symmetry  {:-{


I then tentatively mounted the rudder support plate and determined the place for the upper hole in the hull. Difficult place to drill since it's slanting and so close to the vertical part of the keel. I used an extended Dremel drill to bore a pilot hole and then drilled from the other (upper) side downwards. The result was perfect, I'm glad (and prowd) to report  :P


Caldercraft fail intermezzo: the rudder parts bag came with a note (see below): Important: Rudder tube is now BRASS.
What they failed to mention, however, is that said rudder tube also doesn't fit the rudder shaft. It simply doesn't. Because it is too small. The rudder shaft is 5,0 mm in diameter and the rudder tube, which, important, is now in brass, only has 4,8 mm inner diameter  <*<

Off to the hardware store I went to buy an appropriate 5,0 mm id brass tube which actually fits the rudder shaft.
So if you're about to build the Imara yourself, you may want to double check the inner diameter of your supplied rudder tube.
In the picture below you can see the rudder, the supplied and the home made rudder tube. Note the slightly different sizes.


After I had this little nuisance out of the way I had to manufacture a wooden support for the upper part of the rudder tube since this part no longer seems to be part of the kit (it used to be a white metal part, but I've read other building blogs where they also noted that this part was MIA. No big deal. A wooden block is presumably more solid, anyway.


After I had everything in place (and in the right size), I shortened the screws for the drive shaft supports accordingly and glue-screwed them in place. Likewise the rudder tube and its wooden support. The epoxy is hardening as I type this  %% 
The white metal parts are now coated with white primer, in case you wonder.


Next step will be mounting the drive shafts and aligning them with the steam engine...
Title: Re: Drive Shaft Supports and Rudder
Post by: Tafelspitz on March 06, 2017, 08:27:10 PM
Sorry, double post.
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on March 06, 2017, 08:45:23 PM
Moulds will degrade due to undercuts and rough handling and especially under extremes of heat (casting white metal) or chemical burn (Casting resins). Moulds never wear equally and so while it is possible to have several negatives survive, they will degrade eventually.

If RTV rubber is used for casting white metal, the mould may even have split causing cracks to show on the castings surfaces as RTV for white metal casting is brittle and ghastly, but cheaper to use than a vulcanised mould. This requires a press, mould can and special rubber blanks in silicone (If the originals are made from styrene or similar low temperature) and also organinc rubber, and so is expesive to set up tough there are mould makers around who can do the job for you.

Production moulds should be replaced when the negatives start to wear or rubber that will form hollows in the casting pulls out leaving a solid metal or resin casting. This is infact counter productive as the costs of material increases affecting the cost of a product and thus profit.



Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 07, 2017, 07:56:00 AM
Production moulds should be replaced when the negatives start to wear or rubber that will form hollows in the casting pulls out leaving a solid metal or resin casting. This is infact counter productive as the costs of material increases affecting the cost of a product and thus profit.


Do tell that the guys at CalderCraft  :-)
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 07, 2017, 06:23:42 PM
Are there any fellow Imara builders reading this? If you built the Imara recently or not too long ago: can you confirm that, contrary to what the instruction manual says, the plans are now actually in full size and to scale?
Title: Some more Bits and Pieces
Post by: Tafelspitz on March 09, 2017, 07:39:11 PM
Just got a package with some more bits and pieces. Will be a busy weekend  :}



Title: Re: Building the CalderCraft Imara
Post by: T33cno on March 10, 2017, 06:38:26 PM
A nice example I found
https://charlesmccrossan.smugmug.com/Ships-and-Shipping/Models/Model-Tugs-and-Workboats/i-ZPqdpc5/A
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 12, 2017, 07:49:47 AM
Oh yes, she's definitely a beauty!  O0


Now, I have a question about some spray paint I just bought for the GFK hull, not sure if it's suitable for this purpose. If you please kindly follow me to this topic (http://www.modelboatmayhem.co.uk/forum/index.php/topic,57545.0.html)  :-)
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 13, 2017, 08:44:25 PM
I made some minor progress lately. The drive shafts are now glued in place, and I finally bought myself a drill press. Wanted one of these for a long time anyway.
Next up is the mount for the steam engines.


Oh, and guys... I need some help with the propellers, please. I just can't figure out which part of the drive shaft goes where. See picture below. There's a washer, a nut and a ring with a socket screw. I guess the nut and washer goes at the propeller end and the ring/socket screw at the other end?  :o
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on March 13, 2017, 08:51:01 PM
Yes, that's about it. The nut is a locknut against the prop. The washer seals the outboard end of the shaft and the ring with socket secures the inboard end of the shaft

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 14, 2017, 06:14:30 AM
Gotcha. Thanks, Colin!
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on March 14, 2017, 07:03:17 AM
Just to qualify my previous post. I am assuming that the tube goes through the hole in the A frame and doesn't terminate just outside the hull with an exposed length of shaft going to the A frame.


It is important that the thrust is taken on the end of the tube and transmitted to the hull. With an exposed shaft the nut should lock against the prop and the washer and ring should be between the A frame and the tube against the end of the tube and used to position the shaft so that there is a small gap between the A frame and the prop locknut. Then the A frame just acts as a bearing and does not take the thrust.


Either way, there should also be something to secure the shaft inside the hull to stop it pulling out or placing strain on the motor bearings when going astern.


Colin
Title: Re: Building the CalderCraft Imara
Post by: T33cno on March 14, 2017, 07:22:40 AM
Some more pics for you
 :-))

https://www.ebay.co.uk/itm/272585825424

Title: The (Last) Stand, Sound Module Inquiry
Post by: Tafelspitz on March 15, 2017, 07:23:40 AM
Just to qualify my previous post. I am assuming that the tube goes through the hole in the A frame and doesn't terminate just outside the hull with an exposed length of shaft going to the A frame.


Yes, the tube goes all the way through the A frame and to the propeller. I successfully fitted the propellers accordingly  :-))
Now I need to align and mount the steam engine to the prop shafts. Not too easy (for me at least) with the hull slanting in all directions.


Some more pics for you  :-))  https://www.ebay.co.uk/itm/272585825424 (https://www.ebay.co.uk/itm/272585825424)



Nice, thanks!  :-)




Yesterday I inquired at Model Sounds Inc. about their ShockWave2 Sound module. Shipping to Switzerland is $53, which is a bit more than I anticipated. But fortunately the Swiss Franc is strong compared to the Canadian $ and so it seems to be affordable after all. That would bring the total cost of the module to approx. CAD$ 243. That's roughly 182 Swiss Francs or £148 for you UK guys ok2


Oh, and another thing: I put her stand together  O0
It's not yet glazed, but will be soon. I'll probably go for a dark mahogany glazing (and perhaps a brass name plate). Wel'll see.



Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 18, 2017, 02:32:24 PM
Made some progress in the last couple of days: built the pedestal for the steam aggregates and glued it into the hull.
In hindsight it would have been easier (and actually more straightforward) if I mounted the aggregates first and after that the wooden support for the drive shafts. Ah well, learning as I go  %)


Anyway, the aggregates are of corse removable, they're secured with 4 screws each that go into drive-in nuts on the bottom side of the pedestal plate.
Title: Re: Building the CalderCraft Imara
Post by: T33cno on March 18, 2017, 02:35:56 PM
Fantastic
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 19, 2017, 10:32:47 AM
Thank you  :-)


Picking up on Colin's suggestion, I made a rudder support plate out of brass. It's maybe a bit clunkier than the white metal one but on the plus side it holds a needle roller bearing.
I took a picture with them side by side.



Title: Re: Building the CalderCraft Imara
Post by: david48 on March 19, 2017, 11:27:01 AM

You have made a good job of the rudder support , Just as a observation the needle roller bearing will not be turning very much and the environment that it is in you will have to keep plenty of lubrication there I have a feeling that it might start to jam if grit gets in so you might find the rudder fouls .
just my thoughts you can tell me to take a running jump I will understand
David
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 19, 2017, 02:26:58 PM
David,


you may well have a point there, I haven't thought of that. Will have to keep an eye on it if and when pond yuck gets into it and what it does.
Yours is probably good advice to keep it well lubricated.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 19, 2017, 03:57:49 PM
While the epoxy for the supports of the stern electronics plate is setting, I'm thinking about a possible layout for the steam engine parts (boiler, condensers, gas tank).
Although I can't finalise anything until I'm 100% sure where the funnel is going to sit, I need to order a couple of supplemental steam pipes for making the connections.


I guess there's still room left for the battery and some other stuff (three electric pumps, for instance  :D  )
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on March 19, 2017, 08:33:07 PM
Dom....as you progress, you will find the following very useful for manufacturing your own self bent tube spools

Du-Bro tube benders for both 1/8" and 5/32" OD tube.....also suitable for 3 mm and 4 mm OD hard metric sized tubes

Manufacturing small tube bends in 3D is an art O0....some say for every 1" of correctly bent tube.....[maybe you have used 12" of material]

Refillable gas torch is great for soldering tube connections and annealing tube prior to bending

Are you aware that plumbers soft solder may be suitable for exhaust tubes, however steam lines from the boiler to the engine should be joined preferably via silver solder or high temperature soft solder

There a  number of threads here on MBM about soldering

Derek

PS......

1. your engine bed is good that you have a raised lip around the edges, as oscillator's tend to spray a little sloshy water about.....  :o
2. what type of electric driven water pumps are you considering?
3. please remember that the gas tank should be made easily removable [for filling outside of the hull]
4. you may wish to research a little in the actual recommended placement of the gas tank to the boiler may be critical with respect to temperature gradients especially with the cooler ambient temperatures in Europe
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 20, 2017, 10:48:01 AM
Derek,


many thanks for your tips and considerations! Mucho helpful  :-))





Are you aware that plumbers soft solder may be suitable for exhaust tubes, however steam lines from the boiler to the engine should be joined preferably via silver solder or high temperature soft solder

Actually I intend to use pre-soldered (ready-made) tubing which is available in different lengths from the manufacturer. This has 'only' to be bent in the right shape.


2. what type of electric driven water pumps are you considering?
One is a bilge pump, two is a gear type pump for a fire monitor (I like having one of these for scaring people off the pond :embarrassed: ) and three is a small peristaltic pump for a cooling water outlet simulation.


3. please remember that the gas tank should be made easily removable [for filling outside of the hull]
4. you may wish to research a little in the actual recommended placement of the gas tank to the boiler may be critical with respect to temperature gradients especially with the cooler ambient temperatures in Europe


Actually, I'm just considering discarding the tank and going with small gas cartridges instead. This would make the whole re-filling procedure redundant. Also, I'm looking at an automated gas flow regulator (http://shop-holzapfeldampf.ch/contents/de-ch/p9422.html) (link destination is in german).
Any thoughts on this?


Thanks,
Dom
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 20, 2017, 07:23:30 PM
The first rudder and keel extension plate fitting test. Everything seems to fit nicely. The rudder got some coats of red oxide and I like the color  :-)


Inside the hull I made a plate for the servos and other electronics. At the front end it is held in place by a strong magnet, let-in flush, but I will probably still add an additional mechanical clamp for good measure.
Now I'm thinking about how to mount the three servos, which will be the next step.
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on March 20, 2017, 10:08:01 PM
Dom......the photograph suggests the servo plate may be ''MDF" type board......unless it is the type specially listed as OK for bathroom/laundry and moisture....best avoid it  O0

Most MDF board material will swell  >>:-( when exposed to moisture even if painted or varnished

Marine grade ply is a suitable alternative......and will accept paint or varnish without issue

Derek

PS......if your engine plate is the same MDF material it will be best to also replace this with marine grade ply sheet
Title: Re: Building the CalderCraft Imara
Post by: T33cno on March 20, 2017, 10:09:41 PM
I use paxolin
Can drill and tap it superglue it and waterproof
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on March 20, 2017, 10:37:33 PM
Agree with Derek - don't use MDF if that is what it is.

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 21, 2017, 06:18:09 AM
Oh  :o


Yes, the servo plate is indeed MDF. Thanks for the heads up, guys!


The engine plate is made out of plywood, fortunately. Only the two small supports beneath it are MDF as is the drive shaft / servo plate support...
These will have to go, then, I'm afraid  <:(
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 22, 2017, 08:51:37 PM
You guys probably saved my bacon there by advising me not to use MDF  O0


Still, this gives me a bit of a headache now since I have to remove the drive shaft/servo plate support plate which is also MDF, lest it swells and misalignes the drive shafts. We can't have that now, can we.
So this thing has to go by way of the Dremel mill. Of course I just glued in an additional cross-support the day before  %)



Anyway, once that thing is gone, it will be replaced by this cross-beam (see image below, not yet painted).
Title: Out with the old, in with the New
Post by: Tafelspitz on March 24, 2017, 03:28:14 PM
I milled out the dreaded MDF support plate  <:(
It was a messy and somewhat difficult job, but I got it done eventually. I had to be extra careful not to damage any other structures or the hull.


Anyway, now I'm already in the process of re-assembly.
in the pictures below you can see the new and improved (as in: plywood) servo plate and the new crossbeams replacing the old MDF plate.


And the peristaltic pump for the cooling water simulation just arrived  ok2
I wonder where the cooling water outlet should go. Any suggestions?
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on March 24, 2017, 09:01:41 PM
Dom....please give us the heads up on the detail and supplier of the baby peristaltic pump......at a controlled speed this will simulate the characteristics of a steam driven piston pump :-))

[Many years ago, I supervised the 'shock testing' <*< of the Dutch Bredel peristaltic pump for our first Australian Collins Class submarine build......it was in the original equipment build from Kockumms {Malmo}]

Derek
Title: Peristaltic Pump
Post by: Tafelspitz on March 26, 2017, 06:41:19 AM
Derek,


The peristaltic pump is a WPM1 from Welco (www.welco.net (http://www.welco.net/product/wpm.html)).
They have many different sized models and you can configure them to your needs (motor voltage, tube size and so on).

The WPM1 draws approx. 0,3A at 12V.

Dom
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on March 26, 2017, 08:28:30 AM
Thanks Dom....that is a very interesting WEB site

If the image below is your pump, it would appear that you have chosen a silicone pump tube from the broad and exotic range of tube materials available

The life of any peristaltic tube is only relative to the number of pulsations, the pressure & the medium .......& that the pump tube is mechanically deformed & closed/stressed when not in use

An advantage of this pump is that it appears that you could simply disable the pump outer shell...& remove the rotor when not used

If this is the case, you could expect a lifetime of operation based upon the frequency of operation of a model ship over a given time period

Please keep us posted with your pump installation & progress

Derek

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 29, 2017, 06:35:17 AM
Just a minor update and a lousy picture of yesterday's work.
Prepared the crossbeam which will hold the electronics plate by means of some strong magnets. The magnets in the electronics plate are not yet glued in, that will be today's task.


I also made a servo plate for the two steam engine servos.
Title: Servo Plates
Post by: Tafelspitz on March 31, 2017, 06:12:55 AM
The servo plates are now done and got their first coat of paint, as did the backside of the electronics plate with its 5 magnets.


Next step will be a rough layout of all the stuff that will be mounted on the electronics plate:
- Servos
- Receiver
- Electronic switches (pending)
- Sound board
- Peristaltic pump
- Gear pump
- DC/DC converter 12V --> 6V (pending)
- DC/DC converter 12V --> 3V (pending)

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 03, 2017, 08:05:21 AM
The servo plate is taking on shape. I have mounted the two servo seats and the seat for the peristaltic pump.
Tonight I will test mount the servos.

Title: Servo Plate
Post by: Tafelspitz on April 03, 2017, 08:05:30 PM
Some progress with the servo plate.
Mounted the Servos and the rods, also there's some bits and pieces to see where they may go eventually (peristaltic pump, gear pump, sound module).
No receiver yet, but it's practically clear where it will go.
I still need some more bits and parts, but there's enough room on the plate for everything, it seems. O0



Title: Re: Building the CalderCraft Imara
Post by: T33cno on April 04, 2017, 11:22:22 PM
 :-))






Some more pictures to grab here
http://www.ebay.co.uk/itm/MODEL-TUG-BOAT-IMARA-/112356720275?hash=item1a28fb7e93:g:5dUAAOSwXYtY4VLT
Title: Servo Plate
Post by: Tafelspitz on April 09, 2017, 07:09:35 AM
Some more progress with the servo plate. What's still missing is the DC/DC board which will convert and distribute the 12V from the battery to 12V, 6V and 3V for the different appliances.
I got a waterproof housing for the receiver in place, but no receiver yet  :D
And there are three power switches for the RC for switching the pumps and the light.

I also made a plate for the boiler and condensers, but I can't glue it in yet since i still don't know where exactly the funnel is going to be  %)


Title: DC/DC Board
Post by: Tafelspitz on April 11, 2017, 06:20:26 AM
Just cooling off the soldering iron after soldering the DC/DC board which converts and distributes the 12V from the battery (pending) to +12V, +6V, and +3,3V for the receiver, pumps, light, sound board and whatever I may come up with during the build  ;)
It's already tested and working fine  :-))



There's a dedicated row of pins for every one of the 3 different voltages (+) and one for the ground (-). The pins can either be soldered to or plugged.
Title: DC/DC-Board, Boiler Planking
Post by: Tafelspitz on April 13, 2017, 10:14:09 AM
The DC/DC-board is now complete and ready for use. There's a second, dedicated 6V DC/DC-converter for the receiver and everything is fitted onto a small plywood seat which can be velcroed to the servo plate. Ready for making all these connections and the servo plate starts to look kinda busy  :}


I also started planking the boiler and I have to confess that this isn't my favorite task so far, as you may be able to tell when looking closely at the picture (please don't  ok2 ). But what needs to be done needs to be done, I guess.



Title: Re: Building the CalderCraft Imara
Post by: Brian60 on April 13, 2017, 04:49:49 PM
Some very neat and very nice work being done there.  :-))
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on April 14, 2017, 12:14:49 AM
Dom.....

I am sure in is in your longer term planning, but how will control the two standard servos for speed/direction of each engine....simultaneously & individually?

I understand that Robbe market a 'Navy' version transmitter with two side by side [twin stick] independent controls,........but not sure of other possibilities as marketed

Derek

 
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 14, 2017, 04:27:52 PM
Some very neat and very nice work being done there.  :-))


Thank you, Brian!



I am sure in is in your longer term planning, but how will control the two standard servos for speed/direction of each engine....simultaneously & individually?


Derek, I'm looking into this RC set from Graupner (https://youtu.be/9l3eq8c2nUY) (mz-24 PRO). It has lots of mixers and stuff and I'm sure programming a mixer for the engines / rudder action may be accomplished with this.


Yesterday I mounted the boiler parts on their seat and test mounted the deck boards to get an idea of how things may eventually look inside the hull.
Title: Lugs and Filler and Rudder, oh my!
Post by: Tafelspitz on April 18, 2017, 07:44:28 PM
I decided to go with the supplied keel extension, after all. I fitted it with a plain bearing to lessen the friction. After covering the whole thing with car body filler and sanding it down, I think the result is kinda pleasing.
The rudder is now firmly in place and the inside part of the stern keel section is filled / sealed with epoxy.
Apart from that, I drilled a couple of holes into the keel for the lugs that will supply the two pumps.
And then there are a couple of holes and lugs in the shell plate: one is the outlet for the cooling water simulation, and the other is the outlet for the bilge pump.
Title: Re: Building the CalderCraft Imara
Post by: Korp1010 on April 18, 2017, 08:29:58 PM
Looking good, can I please ask what the white glue holding the propshafts and rudder support is, car body filler? Looks more like a silicone type glue.


Thanks
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 18, 2017, 08:38:45 PM
Yes, it's car body filler. It's the first time I'm working with that stuff, but I like it. It smells kinda nasty until dry, but it's very easy to sculpt and sand.
Title: Re: Building the CalderCraft Imara
Post by: Stavros on April 18, 2017, 09:22:57 PM
PLEASE put some P40 over that filler on the inside of the hull car body filler HAS NO STRUCTURAL strength at all it can crack under vibration.Others will jump on the bandwagn here and say it works for me TRUST me I do know what I am talking about here


Dave
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 19, 2017, 06:12:40 AM
PLEASE put some P40 over that filler on the inside of the hull car body filler HAS NO STRUCTURAL strength at all it can crack under vibration.


Dave, thank you for the heads up. I intended to cover the filled joints of the drive shafts with some epoxy soaked glass fibre. May I ask what you mean by 'P40' as I couldn't find anything on the net (https://en.wikipedia.org/wiki/P40) about that?
Title: Re: Building the CalderCraft Imara
Post by: Paul2407 on April 19, 2017, 06:42:47 AM
What Dave is suggesting is Isopon P40 it's a fibreglass based filler http://www.halfords.com/motoring/paints-body-repair/fillers-preparation/davids-isopon-p40-glass-fibre-repair-paste-600ml  (http://www.halfords.com/motoring/paints-body-repair/fillers-preparation/davids-isopon-p40-glass-fibre-repair-paste-600ml)

hope that helps
Paul
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 19, 2017, 07:44:55 AM
Gotcha. Thanks, Paul!
Title: Re: Building the CalderCraft Imara
Post by: Fred Ellis on April 19, 2017, 08:42:58 AM

I am just loving this post and your work, I also go along with the comments with regard to the car body filler.
I use Milliput two part epoxy putty for most of my filling and fixing, as it is like a putty, you can smooth it with water so less sanding, can be drilled and more, have a look at there Webb site  www.milliput.com
Fred
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 19, 2017, 01:31:21 PM
Thank you, Fred, I think I've used that putty before and I think they got this stuff in our local hardware store. Will check it out next time I'm there  :-))
Title: Water Outlets
Post by: Tafelspitz on April 22, 2017, 07:47:37 AM
Here are the two water outlets for the cooling water and the bilge pump from the outside. Being a tug, the Imara has a rather high water line, meaning that the distance between the deck and the water line is kinda small. Therefore I guess that the water outlets will sit only approx. 2-3 cm above the water.



Title: Re: Building the CalderCraft ImaraSteam Bending some Wood
Post by: Tafelspitz on April 23, 2017, 07:42:01 PM
Tried something I've never done before: steam bending wooden bands for the deck support. One of the bands cracked slightly, but I think I can still use it (provided they actually stay in shape after cooling and drying  :} ) since the crack is on the side that will be glued into the notch.
I have no idea what kind of wood this is, but it gave off a slightly unpleasant smell during steaming. Anyway, I wonder what the result of my bending attempt will look like tomorrow. Stay tuned  ok2



Title: Re: Building the CalderCraft Imara
Post by: steam up on April 24, 2017, 06:39:52 AM
Give "Windowlene" it works treat ,spray on let it soak in then bend simple. :-))
Title: Re: Building the CalderCraft Imara
Post by: T33cno on April 24, 2017, 07:17:53 AM
I found steaming costly and messy
I've been soaking wood overnight and then forming it
Then let it dry out in the required shape
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 24, 2017, 08:46:11 PM
Well well, the bow side bands turned out almost perfect. The stern ones will need some additional treatment, though. I will try T33cno's suggestion and soaking them over night  :-))


Glueing in the first of the bent suppport beams. I'm a bit short of big clamps, so it will be one beam after the other.



Title: Some more Soldering
Post by: Tafelspitz on April 25, 2017, 08:42:16 PM
Well, it turns out that I wasn't very successful with the soaking method, after all. After soaking the wood over night, it just cracked when I tried to bend it. But never mind, I will solve this problem in a different way that won't involve bending.


Anyway, while the glue of the second bow band settles, I did some more soldering on the servo / electronics plate. I don't think it's much of a secret that I'm a bit more capable with the soldering iron than I'm at bending wood  {-)
Also, I finally went and bought (mail ordered) the RC set and it should arrive tomorrow or on thursday. Then I can complete the board and smoke test everything.


BTW I now covered the car body filler parts with glass fibre and epoxy as some of you guys advised. It's not very pretty in places but it sure adds security and stability.
Title: Re: Building the CalderCraft Imara
Post by: T33cno on April 25, 2017, 08:50:34 PM
If its only support beams why not put several cuts part way through to take the resistance out of it?
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 26, 2017, 09:26:13 AM
Yes, that's what I'll probably end up doing  :-))
Title: Look what Santa brought me :-)
Post by: Tafelspitz on April 26, 2017, 08:48:42 PM
Well, well, well. I guess Santa was a bit early this year and he brought with him a nice RC set  :embarrassed:



Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on April 26, 2017, 09:44:53 PM
Reading what Stavros said about P38 being prone to vibration, I will try some other methods to secure my deckwales as well.

Your work with the epoxy and matt is quite tidy as is your filling around the keel/dead water area :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 27, 2017, 06:26:27 AM
Your work with the epoxy and matt is quite tidy as is your filling around the keel/dead water area :-))


Thank you! It still needs some more sanding, though.
Title: More Entrails
Post by: Tafelspitz on May 02, 2017, 07:34:50 PM

Been working on her entrails again. The servo plate is now almost finished. Added the receiver and had to relocate some parts because the receiver is bigger than anticipated with all the plugs inserted.
Put in a couple of 6V 4,2Ah batteries connected in series to give 12V.


I also fitted the bilge pump. And this got me thinking... looking at Brian Robert's Imara build from this thread (http://www.modelboatmayhem.co.uk/forum/index.php/topic,15584.msg175624.html#msg175624), I realized that she sits really, really low in the water and that the wash may come up to the designated bilge pump outlet, which will then lead water straight down into the pump and hull. So I probably better lead the bilge pump outlet someplace higher, over the deck level (a sailor figure working with a hose comes to mind).
I can then use the lower hole either as a second cooling water outlet (no problem with that being flushed over occasionally) or as a decoy.





Title: Re: Building the CalderCraft Imara
Post by: steam up on May 02, 2017, 07:53:35 PM
Could I ask how you arrived at selecting those steam engines for motive power?
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 02, 2017, 08:28:04 PM
This is the steam engine that Krick, the German re-seller, is recommending. See here: http://www.krickshop.de/Produkte/Funktionsmodelle/Schiffsmodelle-mit-Funktion/Imara-Zweischr-Baukasten.htm?a=article&ProdNr=27012&p=73#productdetails-csr (http://www.krickshop.de/Produkte/Funktionsmodelle/Schiffsmodelle-mit-Funktion/Imara-Zweischr-Baukasten.htm?a=article&ProdNr=27012&p=73#productdetails-csr)
Title: Re: Building the CalderCraft Imara
Post by: steam up on May 02, 2017, 08:48:33 PM
Interesting can't wait for the maiden voyage
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on May 03, 2017, 10:41:35 PM
Using the Sailor with hose idea will be attractive and a novel idea.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 04, 2017, 06:35:52 AM
Interesting can't wait for the maiden voyage
Thanks, me too  :-)


Using the Sailor with hose idea will be attractive and a novel idea.


Yes, I think I'll keep this idea in mind. Any ideas where to find some sailor figures, preferably made from plastic? I'm not sure I like the provided white metal figures.


Meanwhile, here's a short video from the first test of the cooling water pump (https://www.dropbox.com/s/jeg0ruonc623orq/2017-05-03%2017.21.48.mp4?dl=0). I have integrated a potentiometer to the pump to regulate the water flow once she's on the pond.
Title: First Water
Post by: Tafelspitz on May 08, 2017, 03:20:55 PM
Yesterday my Imara saw her first dip in the tub for a leak test and ballast evaluation. After putting everything into the hull, I determined that:
1. No leaks (good job with the filler and epoxy, obviously)
2. I will need an additional 4-5 kg of ballast to get her down to the waterline. Finally I can put some of my spare gold bullions to good use  {-)

Title: Re: Building the CalderCraft Imara
Post by: steam up on May 08, 2017, 03:28:10 PM
Would love to see the steam plant running in that test tank :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 08, 2017, 05:54:47 PM
Yeah, me either... but alas, the steam engine is not yet ready. Before I can install it and bend the tubing for the connections, I need to know the exact location of the funnel. I'm afraid this will take some time still.


But I have a picture of the steam engine with the (now attached) gas regulator valve. Made the connecting tube for it the other day.
Title: Taming the Tubing, Glueing the Cross Beams
Post by: Tafelspitz on May 14, 2017, 07:16:05 PM
Now that the innards are almost complete, it's time to wrap up this building phase and go a step further.
After unscrambling and taming the tubing by way of some pieces of pvc tube I'm now ready to mount the crossbeams. Before fitting the stern crossbeam, I will perform another ballast test. After the beams and deck are in place, it will be much harder to fit additional ballast, should there need be. i have now 5 kg of lead pellets for the purpose.
Title: Led Zeppelin
Post by: Tafelspitz on May 18, 2017, 09:55:41 AM
Time to wrap up the work on the servo plate. I filled the stern keel section with about 1,5 kg of lead, all the way listening to Led Zeppelin's "Mothership" album  %%


Lead trivia alert:
Did you know that the english words for plumbing and plumber derive from the days of old when the plumbing actually was made out of lead (latin: plumbum)?
As we all know today, this was (and still is) a bad idea as lead is kinda poisonous. This is also why we don't sweeten the wine with lead acetate any more  :-X
Also, did you know that the Mythbusters once built a baloon made entirely from lead (https://youtu.be/HZSkM-QEeUg) and it actually floated? Still not actually a led Zeppelin, but probably as close as it gets  O0


Anyway, the lead in my Imara is safely tucked away under a sheet of glassfibre and polyester resin. I coated/soaked the lead balls with resin first to secure them inside the hull.


After the resin set somewhat, it was time to insert the servo plate for good and glue in the last one of the crossbeams.
Although it will still be possible to move the servo plate somewhat (this is why I mounted it with magnets), it will need some effort and fiddling to do so once the deck is in place. But basically, in case of an electrical emergency, it should - at least in theory- be possible to access most of the stuff that is mounted on it.



Title: Re: Building the CalderCraft Imara
Post by: steam up on May 18, 2017, 10:01:54 AM
Your a brave man I always need to adjust the lead once the boat is in the "big" pond rather than the test tub (bath).
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 18, 2017, 10:10:53 AM
Bravery has nothing to do with it. It's simply the fact that I won't have access to the stern keel section after the deck is in place.
But there will still be need for adjusment later. I'm gonna need approx. 4-5 kg of ballast in total.
Title: Re: Building the CalderCraft Imara
Post by: furball on May 18, 2017, 10:15:49 AM
Quote
Did you know that the english words for plumbing and plumber derive from the days of old when the plumbing actually was made out of lead (latin: plumbum)?
As we all know today, this was (and still is) a bad idea as lead is kinda poisonous. This is also why we don't sweeten the wine with lead acetate any more   


Up to about 10 years ago when they replaced the pipes with plastic, all our mains water came through lead pipes.


The water company had real fun trying to connect the water meter to it...


Lance
Title: Re: Building the CalderCraft Imara
Post by: Korp1010 on May 18, 2017, 05:43:46 PM
Nice build, can I ask where you get the lead shot from? Thanks
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 18, 2017, 08:15:49 PM
Thank you! The lead shot is from a local store here in Switzerland (which is presumably of little use to you, I'm afraid): http://www.plomben.ch/bleiteile.htm
Title: All Hands on Deck
Post by: Tafelspitz on June 15, 2017, 08:29:19 PM
Hello gang  :-)


After a couple of weeks away (been on a vacation in Sweden - among other things, we visited the Vasa museum in Stockholm. That thing would make a great build, if you're into historic model ships, that is. I'm not  ok2  ), it's now all hands on deck again - glueing in the deck after sanding it to shape and filling the pores.

And should I ever get behind the strange behaviour regarding font size in this forum, I buy a round.
Title: All Hands on Deck, Pt. II
Post by: Tafelspitz on June 19, 2017, 08:14:24 PM
I must admit that glueing in the aft part of the deck felt a tad scary. From now on, access to the innards is strongly limited and it won't be easy to fix or amend something, should the need arise  :o
Anyway, the deck is now firmly in place and the gap between the deck and bulwarks is all filled up with car body filler. Jeez, that stuff smells evil.


Any advice on how to smoothen the bulwarks above the deck? The manual advises levelling with car body filler and then sanding, but I wonder if there's an easier way? How are you guys doing it?







Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on June 19, 2017, 08:24:20 PM
I have found the best way to treat the uneven side of the bulwarks is to line them with thin material. My preference is to use 0.5mm birch ply but others have used styrene fixed with thick superglue.

Colin
Title: Re: Building the CalderCraft Imara
Post by: steam up on June 19, 2017, 08:32:45 PM
Must admit I have used the bodyfiller method it's messy but effective.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 19, 2017, 08:59:39 PM
The problem with body filler, as I see it, is that that stuff hardens so fast I don't have enough time to neatly scrape it in place all around. I wonder if there's something similar with a slightly longer workability time.
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on June 19, 2017, 09:23:22 PM
Body filler takes a lot of effort to smooth down to a level surrface. I have used the lining method on two boats and it is much, much easier. Plus it gives a better flat finish.

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 20, 2017, 06:14:38 AM
OK, thanks, Colin, I will consider the lining method. Sounds like a good alternative, although I can't just see how this works at the bow and stern section where the bulwarks are considerably bent in three dimensions.


BTW, Colin, in your Imara build review from back when you wrote something along the line "I simply gave it two coats of resin which had a similar effect" (quote from top of my head). Do you remember and if so, could you elaborate a bit on that?
Title: Re: Building the CalderCraft Imara
Post by: T33cno on June 20, 2017, 07:02:08 AM
You would need to make a template from thin cardboard and transfer this to a sheet of styrene
Title: Re: Building the CalderCraft Imara
Post by: T33cno on June 20, 2017, 07:54:12 AM
So
(https://photos.smugmug.com/Portgarth-volume-2/i-DS9HQMd/0/19eac1c4/L/IMG_1040-L.jpg)
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on June 20, 2017, 10:43:06 AM
When I made Imara I did use resin. Laid the hull on its sides and at angles for the bow and upright for the stern and used the self levelling of the resin to do the job. It worked reasonably well but on subsequent models I found that lining did a neater job. Obviously you do need to do it in sections to avoid having to make complex curves in the templates .

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 20, 2017, 10:52:11 AM
Gotcha. Thank you guys, I will look into it  :-))
I hope my local hardware store has 0,5mm styrene plates. I do know they have the 3mm kind.
Title: Anchor Hawse
Post by: Tafelspitz on June 26, 2017, 08:22:09 AM
Another question for you guys concerning the holes for the anchors: the instructions states one should drill the holes and fit the white metal hawse, and in goes the anchor. But there doesn't seem to be any kind of pipe envisaged. I'm afraid that the model can and will draw water through the anchor hawse.
I thought of glueing in small plastic beakers or a short piece of plastic tube, which would probably be the obvoious solution.


Any suggestions?
Title: Bulwarks and Filler and Holes oh my!
Post by: Tafelspitz on July 02, 2017, 07:59:31 PM
I went for the styrene lining method, at first. I even succeeded at cutting some pieces in the right shape. Alas, I got frustrated since the sheets came off the day after. Probably took the wrong kind of glue.
Car body filler to the rescue. Although you guys are right, it took a lot of effort and I couldn't get it down to an even, level surface. Plus, the new batch of body filler is darker and slightly softer (almost rubberish) and won't sand as smooth as the other one from Graupner. Oh well. Some frustration goes with every build, I guess  {:-{


After spending the better part of a day sanding, it was time to cut some holes for stem bar and anchor hawses.
Title: Need some Help
Post by: Tafelspitz on July 09, 2017, 10:30:13 AM
Hello fellow shipmates


I need some help, if you've built the Imara or have access to one.
Building the aft section where the two bollards sit, I can't make out which part they're sitting on. The descriptions don't indicate any measurements, and the plans are not to scale  >>:-(
I have two almost identical plates, one is 25 x 9 mm and the other one is 28,5 x 13 mm. My guess is it's the smaller one, but I really can't be sure.
It's part #46 on the plan pics below, indicated with red arrows on the picture of the ply.


Also, if anyone has any detailed pictures of the plate with the gratings (parts #24 - 28) and how exactly this is built, I'd greatly appreciate it.
Title: Re: Building the CalderCraft Imara
Post by: Tug-Kenny on July 09, 2017, 10:37:48 AM

Here's my Imara.

Any help ?

ken

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 09, 2017, 10:45:48 AM
Thanks, but I'm afraid this isn't detailled enough. If you could take some close-ups from the section in question and / or measure the size of the small bollards plate, I'd appreciate it and I'd also owe you a beer or twenty  ;)
Title: Re: Building the CalderCraft Imara
Post by: Tug-Kenny on July 09, 2017, 10:49:46 AM
I'm afraid the model is long gone and all I have are the build pictures you see. 

There is a build blog on here if you have the time to go through it, but I feel that the accuracy that you require may not be found in this builders repetois.    :}

I have been looking back through the site and cannot find my build, but there are other builds where you might find the information you are looking for.

Hope this helps


ken
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 09, 2017, 12:01:30 PM
Thanks, Ken!
I will sift through the pictures on here and on another forum, maybe I can solve this problem.
Or hopefully maybe somebody else with the Imara may show up and points me in the right direction.
Title: Re: Building the CalderCraft Imara
Post by: Martin [Admin] on July 09, 2017, 12:42:37 PM
 
Anything useful here? - http://www.modelboatmayhem.co.uk/Gallery/Imara/index.htm
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 09, 2017, 02:04:52 PM
Thank you, Martin.
Unfortunately also way too little detail on these pics.


One thing I figured out now is that, contrary to the description, the gratings seem to be made from laser cut plywood instead of white metal. Why Caldercraft didn't bother updating the descriptions and the plans is beyond me, though.
Still need to figure out the size of the small bollards plate.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 09, 2017, 06:37:03 PM
OK, I think I got it sorted. I found a picture in another forum that shows the aft part I'm interested in. After some measuring and interpolating, I came to the conclusion that it must be the bigger of the two parts, after all.
http://modeltugforum.com/index.php?action=dlattach;topic=1222.0;attach=15886;image


Thank you!
Title: Re: Building the CalderCraft Imara
Post by: Martin [Admin] on July 09, 2017, 07:37:06 PM
 
I must have dozens of photos of the Imara, but no good ones of the aft deck....  :((

A few from the web:

(http://www.imarablog.org/wp-content/uploads/2009/03/brians-imara-6.jpg)

(http://www.hobbiesguinea.es/759-1483-thickbox/caldercraft-7012-imara-harbour-tug-boat-length-1105-mm.jpg)

(http://www.modelboats.co.uk/sites/2/images/member_albums/137922/539193.jpg)

(http://www.jotika-ltd.com/CKitPics/LRG/Imara_01_07_lrg.jpg)

(http://www.wicksteedparkmbc.com/uploads/1/1/7/3/11739964/1295030_orig.jpg)
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 09, 2017, 08:39:27 PM
Thanks, Martin! Some nice and useful stuff there.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 10, 2017, 08:11:49 PM
All the cutouts cut out. Now she's almost ready for her first coat of primer and paint. First mate already inspecting his future vessel  :police:  But I suggest he better not quit his current day job yet  ok2



Title: Agent Orange, or: The Paint Job from Hell
Post by: Tafelspitz on July 18, 2017, 07:40:37 AM

Agent Orange, or: The Paint Job from Hell

Done some painting over the weekend.
The first round of white metal fittings - filing them took lots of patience and time, but they turned out very well. Two coats of primer and two coats of Tamiya black.


I then went to painting the deck and the inner bulwarks. Applying two or three coats of primer worked like a charm. After the primer was dry, the proverbial poop started hitting the fan, however. My rattle can of orange-red (or Agent Orange, as I soon started to dub it), was very problematic. First of, the color hue was not exactly what I anticipated - too red. And the paint itself was horrible. I can only assume that they sold me an ancient can - and I swear on my grandmothers grave that I gave it a thorough shake - because what exited the can was a mixture of dry powder and messy, sluggish paint. Mostly it was just dry, orange powder  >>:-(
Unfortunately I didn't notice this right away and I ended up painting-powdering the whole deck with that horrible dust-can.
After the mess was dry, I could wipe most of the powder right off with a dry cloth. The sticky, sluggish parts of the paint, not so much.
The good news is, it took me all evening yesterday to remove this messy Agent Orange - sanding, wiping - both dry and with ethanol to get an acceptable surface again. I just realized I started this sentence with "the good news is". I have no idea, why I did that...  {:-{ :(( >:-o >>:-(


Anyway, she's now ready for another coat of fresh (in every sense of the word) and nicer hue of paint  %)
The image below shows her in all her messy glory.


So much for buying paint in a speciality shop  <*<
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 19, 2017, 08:52:56 PM
Whew, what a difference a decent can o' paint makes. She's now properly painted and although I wasn't able to remove all and the last part of the dusty, sticky old Agent Orange, the result is not perfect (my sanding job around the inner bulwarks also wasn't, as the primer mercilessly revealed), but somehow natural looking in a slightly almost kinda weathered way, if you know what I mean.
Next up is carefully covering the top part of the hull and then priming and painting the lower part. I hope this works out less painfully. At least I learned one important lesson with Agent Orange: always test drive a new can of paint  {:-{


The shots below show her after applying the new and proper orange (traffic orange, as it is called for one reason or another). I also included a somewhat wider shot for your viewing pleasure as to get a glimpse into my working space  ;)
Oh, and I brush painted some gratings, which won't be needed anytime soon, but just because I felt like it  {-)


Title: Re: Building the CalderCraft Imara
Post by: BFSMP on July 19, 2017, 09:27:21 PM


I must have dozens of photos of the Imara, but no good ones of the aft deck....  :((

A few from the web:

(http://www.imarablog.org/wp-content/uploads/2009/03/brians-imara-6.jpg)

(http://www.hobbiesguinea.es/759-1483-thickbox/caldercraft-7012-imara-harbour-tug-boat-length-1105-mm.jpg)

(http://www.modelboats.co.uk/sites/2/images/member_albums/137922/539193.jpg)

(http://www.jotika-ltd.com/CKitPics/LRG/Imara_01_07_lrg.jpg)

(http://www.wicksteedparkmbc.com/uploads/1/1/7/3/11739964/1295030_orig.jpg)




I recognise the second picture down as the aft end of old member, Neil's Imara, but built as Perseverance, driven by 2 cheddar steam engines. I know it as his, because he put the aft cabin wrong way round, just to wind up the purists and rivet counters.......irreverent bar manager that he is at times.....but much to his chagrin, no one ever noticed,  {-) {-)


Jim.
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on July 19, 2017, 10:27:46 PM
She has come a long way and looks a treat  :-)) I think you can get away with a certain level of 'crud' representing the crew maintaining what needed to be done to make their vessel earn it's keep and little else.

Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on July 19, 2017, 10:30:18 PM
Never having studied an Imara build  %)....why do some examples depict the AFT lengths of the steering chain box casing of larger section than the FWD sections?......also in another image here we see :o a multitude of eye bolt lugs/eyes......atop of this larger section...

Derek
Title: Imara Build
Post by: Tafelspitz on July 20, 2017, 07:10:16 AM
She has come a long way and looks a treat  :-)) I think you can get away with a certain level of 'crud' representing the crew maintaining what needed to be done to make their vessel earn it's keep and little else.


Yes, you got a point there. While it may serve as an excuse - after all, my skills (and sometimes also my patience, I must admit) are somewhat limited, even if I aim for perfection - I do think that you can actually be too fusspotty with a build. After all, as you correctly point out, real ships are hardly prestine if you look at them: sloppy paint jobs and welds prevail.
Title: Re: Building the CalderCraft Imara
Post by: JimG on July 20, 2017, 10:41:25 AM
Never having studied an Imara build  %) ....why do some examples depict the AFT lengths of the steering chain box casing of larger section than the FWD sections?......also in another image here we see :o a multitude of eye bolt lugs/eyes......atop of this larger section...

Derek
The larger section will be to cover the spring that is normally fitted in the steering linkage.

Jim
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 20, 2017, 08:24:23 PM
....why do some examples depict the AFT lengths of the steering chain box casing of larger section than the FWD sections?......also in another image here we see :o a multitude of eye bolt lugs/eyes......atop of this larger section...


Hi Derek


This is what the plan of the aft section with the chain boxes looks like.


Cheers,
Dom
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 22, 2017, 07:02:21 PM
I don't believe this. I had another stinker of a rattle can  <:(
Bought two cans of brownish red oxide for the lower part of the hull. The first one worked like a charm, but the second one started behaving a bit like that dreadful can of Agent Orange: dry powder exiting the can. I can only assume that one of the two cans was sitting in the shop for too long and part of the solvent evaporated. I always give all the cans a very thorough and vigorous shake, this can't be the problem (and the first one was OK, as I said).
Well, not much of a problem, provided that I can get my hands on a proper can  {:-{


I don't know if you can see it on the pictures below, most of the color is from the good, first can but the white patches is from the bad one where the dry color didn't stick.
This really can't be true.



Title: Proper Pain Job Part II
Post by: Tafelspitz on July 24, 2017, 08:48:22 PM
I can only echo my sentiment from earlier: what a difference a proper can of paint makes. Today I bought not one but two cans of brownish red (or is that reddish brown?  :-) ), just to be sure, for good measure.
And what can I say: mucho better - like a can of spray paint ought to behave. The result was accordingly convincing. This time I left some of the rough, powdery patches from the earlier Can of Death in place on purpose to give it that slightly rusty, weathered look that I came to like from the Orange Disaster last week. I think it looks the part.
Next up is determining her waterline (talkum powder is at hand) and spray painting the upper part of the hull in Tamiya Black.


I also got some pots of paint and started hand painting some of the fittings. I like doing that - it's almost meditational. And I can listen to some good music or to an audiobook or twenty  {-)



Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on July 24, 2017, 09:06:26 PM
Revell do some good colours, I bought some to paint an Albacore some years back and the acrylics were a delight to use.

Re the rattle cans, did you buy them from the same shop? If so, I would avoid them and find another stockist, not always easy I know.

Your hull looks good  :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 25, 2017, 06:32:28 AM
Thank you!
Nay, the two cans were from different shops and they're not even from the same manufacturer. My guess is that these two colors are not exactly bestsellers and sat on the shelf for too long... but I wonder. There's no exp date on any of the cans, nor a lot number or anything. How does one keep track of one's cans, age-wise?


Anyway, for the black paint job I have Tamiya rattle cans and I'm positive that they won't cause me any trouble. And after that it will primarily be hand painting.
Title: Waterline
Post by: Tafelspitz on July 25, 2017, 08:28:08 PM
After cleaning and polishing the hull, I noticed that there were some parts on the A-frames where the color wouldn't stick, probably due to a layer of powder from the bad can. Will have to amend this, but right now it's raining and I can't go outside for this until our lawn has dried up.


In the meantime, I made a nifty waterline tool to draw the, you guessed it, waterline. This gave me a good excuse to finally tidy up my workbench a bit.


On the coloring front, I tried a little bit of weathering on some kind of hatch. What do you think?
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on July 25, 2017, 08:31:56 PM
If you just have a small area to touch up then squirt some of the spray paint into the can cap and use a soft brush. Usually blends in very well I have found.

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 25, 2017, 08:34:27 PM
Brilliant idea, Colin. Thanks!
Title: Paint it Black
Post by: Tafelspitz on July 30, 2017, 08:14:25 AM
Tamiya rattle cans may be small and expensive, but they sure are of good quality. I used up two cans of matte black on the upper section of the hull.
Unfortunately the masking tape came off a bit in places which led to a less than perfect line. Some manual amendment necessary.

I think she slowly starts to look like a ship  ;)


Now as for the white waterline, I think some of you guys tend to use some kind of adhesive band for this?
Any recommendations?


Thanks!
Dom



Title: Re: Building the CalderCraft Imara
Post by: steam up on July 30, 2017, 08:49:43 AM
Mask with Tamya tape paint along the edge with your Base colour, black for the top tape and red for the bottom then any paint bleed will not show, over paint in white.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 30, 2017, 12:00:43 PM
Mask with Tamya tape paint along the edge with your Base colour, black for the top tape and red for the bottom then any paint bleed will not show, over paint in white.

Thank you, but I'm afraid I don't get exactly what you mean. Could you please elaborate a bit?
Title: Re: Building the CalderCraft Imara
Post by: steam up on July 30, 2017, 12:24:02 PM
OK, the problem you described with the "bleed" of paint is caused by the paint creeping under the masking tape. If you apply the tape then paint along the edge (black and red in your case) then the "bleed will be the same colour as the hull. When you paint your white line you will not experience any bleed and the white line on removal of the tape will be crisp and sharp.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 30, 2017, 12:36:53 PM
Ah, now I got it. Sorry for being thick slow. Great, I will try this. Thank you!  8)
Title: Re: Building the CalderCraft Imara
Post by: Fred Ellis on July 31, 2017, 06:46:06 AM
I have always used pin stripe for the boot line, I go to my local Auto paint suppler.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 02, 2017, 06:16:03 AM
I have always used pin stripe for the boot line, I go to my local Aoto paint suppler.


Thanks! I also considered this, but I couldn't get ahold on any auto paint suppliers in the area. I think I'll go with the masking and painting option.
I have painted up a small dummy made from an old toy car for some practicing. The tamiya masking tape should arrive by way of mail today.


In the meantime I glued the aft deck plankings in place and mounted the wash ports (or whatever they are called) to the bulwark. Also some more fittings built and painted.

Title: Re: Building the CalderCraft Imara
Post by: Fred Ellis on August 02, 2017, 08:08:41 AM
Hi Tafelspitz


Your boat is looking good, do you have a sign manufacturer near you? if you have then they some times they have scrap vinyl that they may be willing to let you have.


fred
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 02, 2017, 10:13:40 AM
Thanks, Fred! Good idea  :-))
BTW, is that the Imara on your avatar?


BTW, on another note I learned that Cyanacrylate super glue dissolves Tamiya paint. Who would have thought.
Title: Re: Building the CalderCraft Imara
Post by: Fred Ellis on August 02, 2017, 02:08:11 PM
Hi Tafelspitz


No it is the Perseverance from 1803, back in the early 90's I got a hull from S.W.M Models along with a set of templates, and now that I have been retired for the last three years i now have the time to start working on her, I am also working on a Mobile Model Marine Lady "T" along side her.


I used to be into Model Submarines but I was left a Tug by an old friend and that started my off on tug's.


I all most forgot to say I always get my red oxide and grey undercoat and any body filler I need from my local auto body shop suppler. as it works out cheaper than getting it from the model shop or from Halfords.


All the best


Fred   
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 07, 2017, 06:52:22 PM
Some more progress on the deck planking and some work done on the hatch. In the meantime I'm drawing the white waterline, fingers crossed that it will turn out well.
And just because I had the SLR camera out, a nice shot of the engine for your viewing pleasure  :-)
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on August 07, 2017, 08:38:49 PM
They will work well for you  :-)) No stalling and lots of power with four cylinders I am sure.
Title: Re: Building the CalderCraft Imara
Post by: Martin [Admin] on August 07, 2017, 08:52:38 PM
 
              :-))
Title: Down to the Waterline
Post by: Tafelspitz on August 12, 2017, 08:38:22 AM
OK, the problem you described with the "bleed" of paint is caused by the paint creeping under the masking tape. If you apply the tape then paint along the edge (black and red in your case) then the "bleed will be the same colour as the hull. When you paint your white line you will not experience any bleed and the white line on removal of the tape will be crisp and sharp.


I don't now whether you guys get my occasional song references or not, but during the last week or so I was down to the waterline  ok2
It took some effort, not least 5 (count 'em, five) coats of white until I was completely satisfied with the covering. Thanks to steam up's advice, which was well worth following, I ended up with only minimal bleeding of the white color, namely around some of the rivets, which was amended in no time at all  :-))
I think the white waterline makes all the difference in the world as far as the paint job is concerned. Well worth the effort.
The line is a tad slanted in some places, bit I doubt anyone will notice once she's on the pond.


Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 15, 2017, 08:03:32 PM
Railing time.
All the railing parts are sanded, rounded and primed.
And the steam engines are again mounted in their place. Also, I tried to apply some weathering to the deck.
Title: Some more Minor Progress
Post by: Tafelspitz on August 16, 2017, 08:09:37 PM
Some more minor progress. Painted the railings black, and the hatch is now completed. Glued in the bollards.
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on August 17, 2017, 01:09:59 AM
Great progress :-))....certainly looking forward to the chapter on the steam installation O0........ Derek
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 17, 2017, 08:19:11 PM
Thanks Derek! Looking forward to steamin' her up as well. Will take some time, though. So many things to do, so little time.
Title: Re: Building the CalderCraft Imara
Post by: steam up on August 19, 2017, 05:25:42 PM
Nice to see the progress, love to see that hull under steam power.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 20, 2017, 08:20:39 PM
Thanks!


Today I finished the railings. Pictures show the progress, glueing them in place, sanding the connections and connecting the lower stern section with the upper one using some Milliputty, and finally covering it up in black.
Next up manufacturing of the bulwark stanchions (hence the dremel tool at hand)  :-)

Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on August 20, 2017, 08:32:59 PM
She gets better all the time  :-)) The paint problems were an ordeal and I hope they are over now.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 24, 2017, 08:50:59 PM
Thank you!  :-)


This is just a small update after I finished the stanchions. I will need to amend the black paint in some small places that got chipped away during the installation process. No big deal.
The stanchions were hand painted. I like hand painting, it has a calming and almost therapeutic effect  :-)
Title: Paintbox
Post by: Tafelspitz on August 29, 2017, 08:32:40 PM
Last weekend I made myself a paintbox for spray painting (priming) fittings, parts and pieces. It also makes carrying the stuff outside and back easier.
Plus It gave me something to test run my new Proxxon circular saw  :}


Up on the table is the next batch of white metal fittings.
One of the next tasks will be sanding and fitting the two parts of the upper structure. For some reason, that's something I keep procrastinating.
Anyway, next week will be off since we're on vacation. See you guys the week after the next.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 13, 2017, 04:11:35 PM
Hey guys and gals,


after a great vacation in the Swiss mountains (done some hiking and photographing), I'm back at the build.
Some minor progress today: added some fittings and sanded the machine house in shape. I'm not impressed with the mould quality of this part as it has (had) some thick seams on the side along the rivets.
I had to sand these all down and fill the gap with car body filler.


Speaking of sanding - I also got myself a small Proxxon Disc Sander. Nice addition to the workshop  :-)



Title: Re: Building the CalderCraft Imara
Post by: david48 on September 13, 2017, 11:51:02 PM

Do you know about the block of crepe you can get to clean the sanding disk ,this gives you a lot longer disk life.
Axminster Tools  do them I think .
David
Title: Re: Building the CalderCraft Imara
Post by: maffen on September 14, 2017, 07:52:46 AM
Do you know about the block of crepe you can get to clean the sanding disk ,this gives you a lot longer disk life.
Axminster Tools  do them I think .
David
a piece of rubber sole of a shoe is also great for cleaning disks and cheaper
Title: Chim chiminey Chim chiminey Chim chim cher-ee!
Post by: Tafelspitz on September 14, 2017, 06:47:11 PM
Do you know about the block of crepe you can get to clean the sanding disk ,this gives you a lot longer disk life.



Thank you for the advice, I didn't know that. Good idea!


I did some major sanding today, albeit not with the disc sander. I rubbed down the main structure (the main house, or whatever you call it in english). This was a messy piece of work but I eventually got it done.
Sanding is not my favorite job, but hey, somebody needs to do it  8)


And now, ladies and gents, drumroll please: I finally know where the funnel is going to be located. This is important because it decides where the funnel of the steam engine will sit and I can now finally install the board with the steam engine  :-))
My guess is that within this month you may be able to witness a test run of the steam engine. Stay tuned  :police:



Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 14, 2017, 06:48:24 PM
I hate it how this forum software automagically changes the font size of ones posts sometimes  >>:-( <*<
Sorry about that. I have no idea how to change it back to a legible font size.
Title: Re: Building the CalderCraft Imara
Post by: Tug-Kenny on September 14, 2017, 07:04:22 PM

It's a problem we seem to be getting these days.

I have altered the text above for you.  You only have 30 mins to  'modify' any letter, once it's typed.

ken
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 14, 2017, 08:28:58 PM
Thank you, Ken! I owe you a beer and a half.
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on September 15, 2017, 02:47:35 AM
Do......what is the ID on the oval shaped glass/plastic shaped chimney from the kit?.........

I cannot see the material listing for the Krick boiler chimney, is it grey painted brass?.....or aluminium?

Either way the temperature of the actual boiler chimney tube I expect would be about 100 + degrees C.....

Are you OK temperature wise for clearance?...

Derek
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 16, 2017, 12:22:09 PM
Quote
what is the ID on the oval shaped glass/plastic shaped chimney from the kit?


Derek, I think it is aluminium. There should be enough clearance around it for the temperature to not be an issue.
The ID of the oval chimney is 4, it's made from GRP.
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on September 17, 2017, 05:55:16 PM
Phew! One thing you don't want is a saggy funnel  %% Seriously though, I am looking forward to see your first trial steam up with the plant in situ.

Title: Re: Building the CalderCraft Imara
Post by: steam up on September 17, 2017, 06:03:08 PM
Me too
Title: Grey Funnel Lines
Post by: Tafelspitz on September 17, 2017, 07:33:14 PM
Slowly getting there, boys. Besides working on Imara, I made a Cross-Cut Sled for my circular saw today. Most useful accessory indeed  :-))
After that, I was able to make some woodwork which will keep the plant (and the gas cartridge) in place while still easily removable for service.


I also cut out the hole in the roof of the superstructure for the funnel. Since Imara's funnel is not symmetrical at the base, I had to turn the plant slightly so that the exhaust tube sits in the center of the funnel.
I will probably clad the inside of the funnel with epoxy to prevent it from sagging and then paint it with stove enamel which I have sitting around from the smoker BBQ.


I also made the connecting tubes from the plant to the oscillators, but I still have to solder the end fittings. That's a job for tomorrow.



Title: All the Steam Connections Made
Post by: Tafelspitz on September 20, 2017, 07:16:09 AM
Another step towards steaming up the boat. I have now all the connections made, both gas and steam.
There was a small ordeal with one of the connections I made earlier, though. The pipe that leads from the boiler to the gas regulator valve somehow wouldn't hold. Turns out I used a wrong locknut. Since I got the valve from a different vendor than the boiler, they're using a differently threaded system that isn't quite compatible. So I had to unsolder the fitting and replace the nut. But after that I realized that the fitting and the nut aren't compatible. So I had to unsolder yet again and replace the fitting with a small adaptor tube and the correct fitting  ;D
After I had sorted it all out, everything turned out to fit nicely, at last.
Next step will be leak testing all the gas pipes and connections to make sure everything is, well, leak-proof (gonna use some soap and water). We don't want any gas leaks inside the vessel  :embarrassed:
If everything goes well, I expect the first trial steam up this weekend. Keep your fingers crossed.
Title: Re: Building the CalderCraft Imara
Post by: steam up on September 20, 2017, 07:34:58 AM
You have an audience waiting to see the  big day looking great
Title: Gimme Steam!
Post by: Tafelspitz on September 23, 2017, 03:23:21 PM
Today was the Big Day, I steamed her up for the first time. Everything went well and I filmed it not with one, not with two, but with three HD cameras for your viewing pleasure.


Now if I only knew how to use iMovie to edit it  {:-{
I guess I need to watch some tutorials on youtube first to get me started. Stay tuned.


Some things I learned during the steam-up:
- One of the machines is running slower. I suspect the inner nut on the propshaft is a bit too tight. Should be easy to amend.
- One of the machines has a slightly runny valve. I guess I need to tighten the top screw a tad.
- The portside propeller is running in the wrong direction. I need to reprogram the servo control on the rc.


Title: Re: Building the CalderCraft Imara
Post by: bfgstew on September 23, 2017, 03:43:04 PM
Looking forward to seeing this beauty in full flow.


Stewart
Title: Gimme Steam!
Post by: Tafelspitz on September 23, 2017, 09:09:34 PM
Alright, ladies and Gentlemen. I made a short (approx. 5 minutes) video of the steam-up. Here it is in high definition (https://www.dropbox.com/s/q6a80zra2zk612a/IMARASteamB.mp4?dl=0) but beware, it's over 500 MB.
Let me know what you think  :-)


If you have a fast connection, you may download a better quality file here (https://www.dropbox.com/s/3xjuqht4jubj990/IMARASteam.mp4?dl=1).
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on September 23, 2017, 10:35:09 PM
Well congratulations on her first steaming Dom.....[I used the first download link]

The engine speed control is very realistic [stdb engine 4:44 minutes] displays extremely smooth engine speed control  :-))

I am sure you will find even greater control with the a load on the propellers [hull in water]

We did see a wisp of steam from the Port engine a few times......I would not be concerned....this is totally normal

I am also sure the manufacturers instructions will talk about using a greater flow of steam oil, and journal lubricating  during initial running ...bed in of the mating faces etc......

Sit back & have a beer......Derek
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 25, 2017, 06:22:33 AM
Thanks for your encouraging words, Derek!
It sure is fun to see some pieces finally falling into place.
Title: Re: Building the CalderCraft Imara
Post by: steam up on September 25, 2017, 07:10:02 AM
Looks great get it in the water lol
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 25, 2017, 08:23:19 PM
Thanks  :-)
Title: Re: Building the CalderCraft Imara
Post by: MrP1986 on September 26, 2017, 09:28:16 PM
Looks fantastic! One of our club members has one and the size of it never fails to amaze me. As does the weight!
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 27, 2017, 07:31:04 AM
Thank you. Yes, she's quite a big lady  ok2
Title: First Light
Post by: Tafelspitz on October 02, 2017, 08:11:06 PM
After letting off some steam, I'm back in the electronics lab with some first LED soldering. This is the first time I use SMD LEDs, they're quite tiny and need a steady hand soldering. One has also to be very careful not to overheat them and protect them from static electricity. Fortunately soldering is an art I master quite well. But they're worth the effort, I like the warm white light they emit. It fits the epoch and represents tungsten bulbs well enough.


I also made the connections to the super structures for light, sound, the fan and a reserve function.


Also some more bits and pieces in production for the windlass, and so on.
Sometimes I have the feeling I'm a bit all over the place with my build, but if this part A dries and part B sets, I can make part Z  :-)



Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on October 02, 2017, 09:34:08 PM
Lovey job and a splendid video of her working pretty well given its her first run, so the issues you had won't difficult to fix, and with some running in like what Derek says, she'lll be a beaut.

Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on October 02, 2017, 11:36:27 PM
Hullo Dom.....even the designers of the model kit can get it over zealous :o .....

That Fwd hatch cover has too many screw down dog nuts ...the Stdb & port side are shown with 3 per side......but you cannot tighten them as they hit each other

Just a thought....maybe a little patch work......but you could consider removing the centre pair...[or in reality, 4 dogs I would have thought adequate  :-)) ]

Derek

 
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on October 03, 2017, 07:15:30 AM
Lovey job and a splendid video of her working pretty well given its her first run, so the issues you had won't difficult to fix, and with some running in like what Derek says, she'lll be a beaut.
Thank you!



That Fwd hatch cover has too many screw down dog nuts ...the Stdb & port side are shown with 3 per side......but you cannot tighten them as they hit each other


Hey Derek, yes, you're absolutely right and of corse I also noticed that. But since all the pictures of Imara out there show it that way, and since the cover isn't a functional part anyway, I thought so what  {-)
Title: Styrene
Post by: Tafelspitz on October 03, 2017, 07:23:18 AM
BTW, what are you guys using for gluing styrene parts to wood? This is the second time one of my styrene parts came apart. Neither super glue nor araldite seem to do the job  :o
And yes I'm always sanding and cleaning with ethanol to remove dust and grease.
Title: Re: Building the CalderCraft Imara
Post by: T33cno on October 03, 2017, 07:26:03 AM
Deluxe materials FUSION.
I agree about the hatch if it donít look right it ainít  {-)
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on October 03, 2017, 07:36:20 AM
Deluxe materials FUSION.


Thank you, that stuff looks interesting. Only problem, they don't ship outside the UK.
But I will check for something similar to get locally.


Quote
Please note! Cannot be sent overseas. Can only be sent UK MAINLAND


EDIT: OK, I found something similar. Thanx again!
Title: Re: Building the CalderCraft Imara
Post by: T33cno on October 03, 2017, 09:39:09 AM
Why buy from Uk? There are dealers else where
http://www.oupsmodel.com/308_deluxe-materials (http://www.oupsmodel.com/308_deluxe-materials)
Title: Remote
Post by: Tafelspitz on October 08, 2017, 08:20:22 PM
Today I filed and sanded all the parts and pieces for the windlass. What a tedious job  :P
And meanwhile I programmed a mixer function for the rudder / steam engine. It's not yet perfect, but I'm still learning.



Title: Re: Building the CalderCraft Imara
Post by: Martin [Admin] on October 08, 2017, 10:34:21 PM
 
I've seen more subdued '80 Disco lighting than that Transmitter!!!   :o


   BTW: How many times did you jab yourself with the needle file when filing the winch?!   O0
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on October 09, 2017, 06:48:12 AM
Yes, the transmitter is quite colorful, isn't it? But it has many possibilities. Alas, it's not always easy to wrap your head around the programming functions. I guess some of the timers may come in handy as gauges for water and gas filling levels.


Oh, and I didn't jab myself with the file. Should I have?  :}


BTW, I noticed that my kit is missing the 2,4 mm steel rod used for axles for the winch. I guess my local hardware store should carry these...
Title: Bow Section
Post by: Tafelspitz on October 14, 2017, 04:05:34 PM
I turned my full attention to the bow section. While the paint on the windlass parts cures (sorry for the really crappy picture), I finished the small cabin construction (whatever it is called). Except I could't locate the door handles yet amongst the gazillion of white metal parts. They will turn up eventually, I guess. If not, I can always make my own.
I also drilled a couple of holes into the deck for the wires of the small cabin, the mast, and the anchor chain. There will be a short stub of tube underneath for the chain to go in.


I made a small construction from some scrap wood to paint and weather the anchor chains  :-)


Next step will be assembling the windlass.
Title: IMARA: Notice anything different?
Post by: Tafelspitz on October 19, 2017, 08:48:17 PM
Notice anything different?


I had the lettering made in three different sizes: big, too big and way too big. So I went with the big one. The Dar-Es-Salaam I also had made is way too big to fit. I will leave it out (don't like that too much, anyway).



Title: First Light, Pt. II
Post by: Tafelspitz on October 24, 2017, 08:14:40 PM
Made some progress on the bow area. While the winch itself is almost done, I will have to re-do the rustall weathering since I'm not satisfied with the way it looks. The anchor chains are still in the weathering shop.
I also made the resistor bank for the bow section lights (mast lights and interior of the small cabin).
Speaking of the small cabin, there's a problem with the light I haven't considered. Since I made the bent roof from styrene, the light is shining through, showing off my nasty paint shop beneath the top layer of paint. While the roof looks good without the light, it looks nasty and ugly with the light on. I will probably renounce the light in this cabin since it's already glued in place and there's no easy way to fix this. Oh well. You learn something the hard way every now and then  ;D



Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on October 25, 2017, 07:43:45 AM
Do you guys think two coats of black paint and then covering it in white again would make the plastic roof impermeable to the light?
Title: Re: Building the CalderCraft Imara
Post by: terry horton on October 25, 2017, 09:57:35 AM
Yes...It would certainly help stop the light showing through .. I've done this many times on my own models.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on October 25, 2017, 10:03:42 AM
Brilliant, thank you, Terry. I'll try this, then.
Title: Re: Building the CalderCraft Imara
Post by: steam up on October 25, 2017, 10:22:22 AM
You could line it with Aluminium foil :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on October 25, 2017, 01:46:19 PM
Yes, that would definitely do the trick. But it would also not be as easy now with the cabin glued in and the vent mounted to the roof  {:-{
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on November 01, 2017, 08:17:21 PM
Some assorted work being done. The light-leaky roof first painted with two coats of black and now I'm in the process of painting it white again. It will take another 3-4 coats until it will be uniformly white again. The roof used to be 1 mm plasticard, now it's probably double that thickness  :}


Also, rusting the anchor chains is taking progress as you may (or may not) see on my sh!tty tablet photograph. I really need to bring the SLR camera to the shop more often.


And then, finally, I started work on the smaller deck structure. This will be spray painted white after the doors and window frames are in place. Since this is made from sturdy GFK there won't be any light shining through. Still, I may give the inside a coat of black for good measure.
The hole in the roof is for the wires of the rear navigation light which, incidentally and strangely, does not sit in the middle.
Title: Re: First Light, Pt. II
Post by: missyd on November 05, 2017, 10:56:04 AM
I also made the resistor bank for the bow section lights (mast lights and interior of the small cabin).
Speaking of the small cabin, there's a problem with the light I haven't considered. Since I made the bent roof from styrene, the light is shining through, showing off my nasty paint shop beneath the top layer of paint. While the roof looks good without the light, it looks nasty and ugly with the light on. I will probably renounce the light in this cabin since it's already glued in place and there's no easy way to fix this. Oh well. You learn something the hard way every now and then  ;D

I use bulbs for cabins and wheelhouse. They have a very warm light. LEDs have this strong white light. I had the same problem with the N. Loredana. The LEDs I used where to white and I ended up putting some dark color on them till only a little bit of light came through.
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on November 05, 2017, 11:52:09 AM
You can buy small warm white LEDs these days, I have some in my fishery cruiser model. I used the white ones for the Nav lights.

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on November 05, 2017, 12:00:13 PM
Ye, my LEDs are of the warm white kind. Nothing wrong with them. The problem was only due to the roof not being dense enough. After adding two coats of black, everything is ok now  O0
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on November 05, 2017, 12:15:42 PM
I had the same problem with the superstructure deck lights shining through the boat deck overhead. I used some black insulating tape to cure it.

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on November 05, 2017, 08:29:02 PM
Here we go again, filing another batch of white metal parts for the engine house structure. It isn't as arduous and boring a task if you can spread it out throughout the build.
The deck house is now ready for priming and painting. To prevent the light of shining through, I will give the inside a coat or two of black. Lesson learned  8)



Title: Re: Building the CalderCraft Imara
Post by: T33cno on November 05, 2017, 09:31:26 PM
So much satisfaction  O0
Have you even considered what next  :-)
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on November 06, 2017, 06:59:09 AM
You mean "what next" as in "after I finished this build"? Not really... I guess this one will occupy me for another year or so.
Only the flying spaghetti monster knows what happens then  ok2


But if I'm going to build another ship (that's an if, not a when), it most probably won't be steam driven. The Resolve would be tempting, but I'm not sure I'd want to go with another CalderCraft kit. A somewhat more modern vessel with bow thruster would also be nice.
I don't know. I'll cross that bridge once I'm down at the river, I guess.
In any case, don't quote me on anything  {-)
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on November 06, 2017, 08:58:54 AM
Dom...

We see the Talcum powder plastic bottle and Talcum on your work paper  ...are you using this as an anti caking/anti clogging medium on your files when cleaning the soft white metal components?

Derek
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on November 06, 2017, 09:20:05 AM
Yes, that's correct. I got that brilliant piece of advice from ballastanksian awhile back.
Title: More lights
Post by: Tafelspitz on November 07, 2017, 08:43:19 PM
Tonight was another soldering session. I made a resistor bank for the machine house lights (two interior lights and one position light on the roof).
I glued the two interior LEDs directly to the electronics board which itself will be mounted on the inside of the roof.
Let there be light  :D


As soon as the weather allows it, I will rattle can spray the machine house.
Title: Re: Building the CalderCraft Imara
Post by: Brian60 on November 08, 2017, 09:29:06 AM
With regard to your leds shining through plasticard.

I am now using A paint from Vallejo model paints in their Metal Colors range. The colour I have used is 'silver', this paint is very high in powdered aluminium so has reflective properties. I paint on two coats of it and then overpaint that with the colour of the actual item -white for my particular application. It seems to work quite well for me, I use it on floodlight fixtures. The led is embedded in resin which is the shape of the floodlight, so the whole thing becomes luminous when lit. The Vallejo has at the moment has done the trick of letting it shine just through the front 'lens'

Edit: its also acrylic so goes on by brush and clean up is ordinary water,  a second application can be done in as little as 20 minutes as well.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on November 08, 2017, 10:50:36 AM
Thank you, Brian!
Although I don't have any more plasticard structures, that's something to consider in the future and I have saved the link to Vallejo model paints for further use  :-))
Title: Bend it, bandit!
Post by: Tafelspitz on November 19, 2017, 08:30:42 PM
And what was I up to in the last couple of days? Well, for one, spray painting the machine house despite the cold and nasty weather. Since the paint won't dry very well outside I bit the bullet and moved the paintery inside my workshop. Oh well.


The windlass and the anchor chains are now installed. I think the rust job on them is not too bad. It looks even a tad better in real life than on the pictures.


And then I started work on the tow rope guards. I soaked the wood stripes in ammonium hydroxide (ammonia solution) to soften the lignin. Worked a treat, but if you ever try this be extra careful and only do it outside wearing gloves and safety glasses.



Title: Sound, Light!
Post by: Tafelspitz on November 20, 2017, 06:47:41 PM
Fiat lux, let there be light. The 3 SMD LEDs in and on on top of the rear building in action. The windows will be matted a bit and some "ornaments" are not yet painted in their eventual color, but it gives a good impression of what it is going to look.
Title: Slow Progress
Post by: Tafelspitz on December 03, 2017, 08:20:51 PM
Progress is slow but steady. Rope guards are taking shape, but since I don't have enough clamps I have to draw out the gluing. I guess I should add some more clamps to my christmas wish list  ok2
Anyway, also some more detail added to the machine house (painted the latches and the air vents, added door handles).

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 03, 2018, 07:36:26 PM
Hey guys, I'm still alive and kicking, although work was a bit slow over the holidays.
Who would have thought that these rope guard rails were that much work  :-)
But now I'm almost done, painting was a bit laborious with two colors and two coats each, but slow and steady will do it.


Pictures show the progress so far. After the paint is dry and the supports are glued in place, I will then apply some weathering.
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on January 03, 2018, 07:51:28 PM
Looking good!

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 09, 2018, 08:18:43 PM
Thanks, Colin!


The rope guard rails are finally done and done. They were not difficult by any standards, just surprisingly complex to make with bending, glueing, painting, fitting... but very satisfying.
Now up to some more white metal parts. The stern capstan... this got to be the worst moulds so far. Lots of stepping, mould lines and foul edges and corners. No way to file this to perfection. I will have to wind a rope around it when finished to conceal part of the imperfections  (https://www.cosgan.de/images/smilie/boese/a030.gif)
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on January 10, 2018, 10:36:40 PM
Ooh, that is a sickly baby isn't it Dom. I can see the metal has crystalised and the mould was probably scalding hot when that was cast. Better in resin in my opinion. She's looking a top class model, and like the cabin with all the rivets and rounded plates  :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 11, 2018, 09:48:21 AM
Yes, but fortunately this seems to be the worst part of the kit. Everything else I've seen so far looks OK.
But the package with the capstan parts is a t'urd. Even the frame is bent out of shape. But I guess once bent back, filed and painted, it's gonna look OK.
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on January 11, 2018, 11:58:08 AM
Ask them to send you a replacement.

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 16, 2018, 08:16:47 PM
Some exciting news: I made myself a late little christmas present and got an Ultimaker 2+ 3D-printer  %%
This will allow me (among other things) to replace some of the more cumbersome parts that came with the Imara kit with plastic printed 3D parts  ok2
I already test ran it with a couple of things I found online (some cool battered oil barrels and a wooden barrel, see pics).
Today I got a bit adventurous and tested my skills at 3D designing... with an easy initial part which is the aft oil tank of the ship. I made it from 2 parts that are supposed to fit together with a triangular guide.
Fits perfectly, but I will have to re-print it again because of a couple of imperfections due to me not calibrating the print bed properly before printing.
Anyway, looking forward to doing some of the fittings in 3D. The refrigerator and the water tanks come to mind  :-)


Can you tell I'm excited?  :police:
Title: Re: Building the CalderCraft Imara
Post by: Tug-Kenny on January 17, 2018, 10:43:40 AM

I would also be excited it I could get quality like that..   

Looks great.   :-))

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 17, 2018, 11:08:40 AM
Thanks  :-)
Title: Re: Building the CalderCraft Imara
Post by: Footski on January 17, 2018, 02:19:26 PM
Beautiful work. I am very jealous... %)
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 18, 2018, 09:18:13 AM
Thank you, Footski!  :-)
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 19, 2018, 07:09:03 AM
The second time around, the aft oil tank came out much better after properly calibrating the printer bed plate. No more warping of the corners.
Also, I 3D printed the large water tank that will eventually sit somewhere on the main upper structure. Of course this ain't no very challenging part to print as it's basically just a square block of plastic, but it was still fun to make instead of the wooden parts provided with the kit  {-)
However, I got a bit more adventurous yesterday and CAD-designed the wooden aft rope crate. Took me about an hour and a half to design according to the plans. This will be a bit more challenging to print as the top section contains some overhanging of the top boards, which is by nature a bit difficult to print. I will probably have to try-and-error some printer settings to print it OK.
I intend to print it with wood filament to give it a, well, wooden look. You guys (and gals) will be the first to know how it turns out. Watch this space  :-)


Anyway, the aft capstan is also work in progress, pictures showing assorted parts in different states (primed, first coat of color etc).
Also you can see some 3D printed "battered barrels" I was talking about in an earlier post.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 21, 2018, 08:29:48 AM
Printing the rope crate in woody filament didn't turn out well and I had to abort the print after the bottom layers. The woody filament is apparently a bit too brittle for this delicate structure.
I then went with the standard filament that came with the printer. This turned out very well. It took about five hours to print. There are some rough edges I will need to sand and of course I will yet have to cut away the brim around the bottom (this is being built to prevent warping of the build when it is cooling down).
I guess after sanding and painting, it will look good  :-)



Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 23, 2018, 08:06:11 PM
Rope crate now cleaned and sanded, feet attached and ready for priming and painting  :police:
The oil tank is also glued together and ready for a slab of paint. Showing these two parts in situ. What do you think?

Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on January 23, 2018, 08:13:07 PM
Unless you planned to keep the crate unpainted, you chose right to re print it in the other polymer and you can paint something to look like wood with a little effort and a pallette of brown paints.

All in all, you have printed some crisp pieces that should last for longer without joints that might split over time due to damp ingress etc.

The seas's the limit for you now  :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 23, 2018, 08:39:22 PM
Yes, I'm definitely gonna paint it. In fact, it is now already primed. We'll see what I can do with my color palette and the weathering kit  :-)
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on January 23, 2018, 08:50:37 PM
Dom....some of these discrete rust weathering is superb  :-)) ............ Derek
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 24, 2018, 06:46:04 AM
Thank you, Derek! My "rust" is a combination consisting of Rustall and Raw Sienna acryllic paint.


Incidentally, I just have to ask: you do know that you can take screenshots very easily and conveniently directly from your computer without the need of a camera, right?  (https://www.cosgan.de/images/smilie/verschiedene/a015.gif)
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on January 24, 2018, 07:21:50 AM
Yes Dom.........nice rust......"our Martin has preached & constantly reminds me in the virtues of 'screenshots very easily and conveniently directly from your computer without the need of a camera'

However in my aging years ......I find chewing a bone sometimes nicer than a steak dinner  :-X

Derek
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on January 29, 2018, 07:33:27 AM
After some painting and aging, the rope crate is now finished along with the capstan and the oil tank. Aft deck is slowly taking shape.
I have no idea what the wooden barrel is for, but I liked it so much that I decided to keep it around  :-)

I guess I need to make some ropes soon (ropeway kit is at hand but not yet built).


Incidentally, I've uploaded my 3D designs to Thingiverse (https://www.thingiverse.com/search?q=imara&sa=&dwh=315a6ecb6ada0d3) (and intent do do so with future part designs), just in case somebody is interested in them in the future. There's nothing wrong with the parts from the kit, but it gives you an alternative  ok2

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on February 09, 2018, 07:56:21 AM
As the work on the aft deck section continues, I have one more water pump to cover.


Not sure if I ever showed you the bilge pump outlet. It's the bent black tube and I hope that it won't see too much usage once on the pond.


Picking up on an idea I had earlier, I intend to have a sailor with a water hose that can spray some water off the boat.
I designed and printed a fire hydrant like structure. It is hollow so I can thread the hose through the opening and down below deck to the pump.


Question for you guys and gals: as I'd like the hose to be black or darkish brown, does silicone rubber take on Acrylic paints?

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on February 18, 2018, 09:28:06 PM
I finally mounted the rudder linkage cover grate and will leave the aft section be for now. Moving on to the main structure.
Doors and window frames need yet some processing, then I will have to cut and drill some holes.
Once again it is a pity that the plans are not to scale, it would be so helpful if I could take measurements directly from them.
But then it would be too easy, I guess  %%



Title: Re: Building the CalderCraft Imara
Post by: Ianlind on February 19, 2018, 12:19:16 AM
 I think you'll find that nothing will stick  to your silicone tube.


Ian.
Title: Re: Building the CalderCraft Imara
Post by: Brian60 on February 19, 2018, 09:08:31 AM
You will find it very difficult if not impossible to get anything to stick to silicone, be that paint or glue. The answer is obvious. Check out ebay in the car spares section for coloured silicone hose, yours looks to be 6mm so it is readily available for windscreen washers, comes in many colours so you could have red, black, brown blue etc. Apparently those hatchback car customisers use it by the truckload for tarting up their car engines.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on February 19, 2018, 08:46:27 PM
Thanks for the heads-up, guys.
I will look for some coloured silicone tubing, then  :-))
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on February 20, 2018, 08:04:00 PM

I had a quick look for silicone paint and silicone based paints but found nothing but tools made of silicone!


Pre coloured hose is a good idea  :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on February 21, 2018, 09:26:35 AM
Thank you  :-)
I shall go out into the wild wide web in search for some pre colored silicone tubing.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on March 12, 2018, 01:36:51 PM
Not too much work done recently, but now I started work on the large structure. Drilling holes for windows and doors and gratings.
Again, the plans are of limited help but I guess I will get there eventually. Identifying all of the correct white metal parts is also a challenge since some stuff has been changed since the plans and the manual went in print back when. But it's all part of the fun, I keep telling me  :}







Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on April 15, 2018, 08:50:04 PM
Miss me a lot recently?  :}
Had some other stuff coming up, like setting up a new computer after the old one died a hardware failure death. Glad I had everything backed up properly. Do back up your stuff, friends.


Anyway, back in the shop I cut out all of the windows and other openings. Glued in some of the window frames and noticed that not all of them had exactly the same size, so I'm left with some gaps. Some car body filler coming up. I already missed that stuff  :D





Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 15, 2018, 07:25:27 PM
Not much time lately, so here's just a tiny update.
Window frames are now glued in, filled and sanded.
I started to make a couple of wooden parts to mount the funnel. I will also need some wooden framework for the speaker and the air intake fan (next up on this channel, stay tuned  {-) [size=78%]). Now that the temperatures are up I can then start spray painting stuff again [/size] :D

Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on May 16, 2018, 10:27:09 PM
Lovely work  :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 17, 2018, 08:08:00 PM
Thanks!  :-)




The funnel will be removable for... whatever reason there may arise. It is mounted by means of three 3mm screws. The wooden parts are going to be glaced later.
After that I tested a new gadged, the circle cutter. The hole will hold the speaker. Worked like a charm and produced a perfectly clean and circular hole. Recommended  :-))
After cutting the planks that will hold the speaker plate I called it a day. Next time I will glue them in. A small frame for the air intake fan is also still missing.



Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on May 17, 2018, 08:30:40 PM
It looks like you could cut rings with that tool as well.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 17, 2018, 08:38:47 PM
Yes, that's correct. There's also an extension arm that allows you to cut holes up to approx. 30 cm, but my drill press is not large enough for it.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 22, 2018, 02:27:20 PM
Test fitting the speaker after mounting the wooden frame. The speaker will sound through the portholes on the upside of the engine housing while the hull serves as sound box  :-)
The steam oscillators are just beneath the speaker, so it may need some shielding as they tend to spray oil and water around as they run.


The doors are primed and ready for glueing. In fact they're already glued to the structure but I haven't got a picture to prove it.  :police:
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 25, 2018, 07:20:09 AM
Doors are in place and also the vent grilles on both sides.
The single vent on the port side covers the small 12V air intake fan.
Funnel is not yet sanded, I just put it on there to show what it will eventually look like. Soon it will be time for priming and painting.
Title: Re: Building the CalderCraft Imara
Post by: Brian60 on May 25, 2018, 07:48:35 AM
In your first photo why is their a vent cowl stuck on top of the companionway on the starboard side? This is the strangest place I've ever seen one, surely if air was needed here, just open the door in the companionway!
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 25, 2018, 08:04:12 AM
Good question, Brian.
I have no idea and all I can say is "it's in the plans" and practically all of the other Imara models on the web (https://www.google.ch/search?rlz=1C1GGRV_enCH752CH753&biw=1369&bih=878&tbm=isch&sa=1&ei=V7QHW4ObN-yEgAb7uLw4&q=imara+tug&oq=imara+tug&gs_l=img.3..0j0i24k1l3.59145.60931.0.61101.9.9.0.0.0.0.103.660.8j1.9.0....0...1c.1.64.img..0.9.644...0i67k1j0i10i67k1j0i10k1j0i8i30k1j0i30k1.0.i0QOGUrkLA8#imgrc=kuNELzsODD7g_M:) also have it  :-)
Title: Re: Building the CalderCraft Imara
Post by: Brian60 on May 25, 2018, 06:45:47 PM
Hmmm, could be a confusion by the person who drew up the plans methinks! I found this photo of Imara (which was renamed Perseverance) There is a cowl vent shown but it clearly rises from the deck next to the companionway, slightly to the front and port side of it. Above the companionway you can see the ships bell, which would be hung on the fore part of the superstructure - you wouldn't see this if there was a cowl sprouting from the companionway.
But you are correct in that every model of the ship on Google has the cowl vent on the 'shed' :}
Title: Re: Building the CalderCraft Imara
Post by: Subculture on May 25, 2018, 10:46:23 PM
You can purchase silicone hose in black.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 31, 2018, 08:30:35 PM
You can purchase silicone hose in black.


Yes, I'm onto it, thank you!



Anyway, I designed and 3D-printed some door hinges to go with all of the doors and I think they fit the model well and add a touch of reality. They will need a slab of weathering here and there to simulate old grease and stuff, but for now I'll let them be. Door handles not yet added.
Inside the cabin, I mounted the fan and the speaker. Ah and yes, it's spray painted white with two coats of clear varnish.
While the superglue cured, I car body filled the seams of the funnel, but I don't have a picture of that yet.
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on May 31, 2018, 08:32:19 PM
That's all very neat Tafelspitz, you are making a superb job of the model.
Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on May 31, 2018, 08:36:35 PM
Thank you, Colin!
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on June 01, 2018, 02:04:36 AM
With the Pillow fan, are you pulling in air for combustion?...if so, this is actually typical of coal fired boilers where fans pressurised the boiler spaces by a few PSI over atmosphere to aid combustion

So you may need to provide some shim trunking from around the fan 's round cowling, down toward the boiler gas burner area location......

A consequence of not doing this is that the air that the fan draws in will be lost to atmosphere out of the portlights or any air spaces between the deck & the superstructure

The second consequence of no direct air trunking is that the boiler burner will need to draw substantial amounts of free air [oxygen] to maintain combustion....the only way to achieve this is to have a great number of portlights or mesh grill's & doors open

Remember a gas flame with insufficient oxygen will burn with a yellow flame, where as all of your trials without the superstructure fitted yielded a bluish flame at the burner....when you fit a superstructure, you may loose the ability to see the flame >>:-(

Shim brass of 0.003" thick is an excellent material to use for trunking......it folds well, cut easily with kitchen scissors, and all joints can be soft soldered to make a rigid trunking

[it also returns you to your school days of developing shapes from paper of cardboard %)]

Derek
Title: Re: Building the CalderCraft Imara
Post by: Steve Mahoney on June 01, 2018, 06:27:54 AM
Your rope cradle has inspired me.
I think I need one. I'll have a go at it at 1/50.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 01, 2018, 06:53:55 AM
Your rope cradle has inspired me.
I think I need one. I'll have a go at it at 1/50.


You may download the file here (https://www.thingiverse.com/thing:2791221) at Thingiverse if you want and scale it to your needs. At 1/50 you may want to print it with a smaller nozzle size (0,25mm), though.


With the Pillow fan, are you pulling in air for combustion?
(...)

So you may need to provide some shim trunking from around the fan 's round cowling, down toward the boiler gas burner area location
(...)


Derek,


yes, the fan is intended to help keep the fire burning  :-)
Actually I was planning on keeping things simple. I will go with either of three possible scenarios:
- Using only the fan
- Keep the windows and portholes open
- Keep the windows and portholes open + using the fan


I guess after test running the machine with the structure in place once the funnel is installed, I will see what is needed. I can then use tape to close and open the windows.
Shim trunking would be only the last resort if everything else failed...


Dom
Title: Re: Building the CalderCraft Imara
Post by: Steve Mahoney on June 01, 2018, 11:00:03 PM
Thanks Tafelspitz, that's very generous of you.
I'll try one next time I have an order from Shapeways. Unfortunately the postage costs to NZ mean that I need to order several items at once to keep costs down.
In the meantime I might try to make a similar cradle from styrene strip.
Title: Re: Building the CalderCraft Imara
Post by: Capt Podge on June 01, 2018, 11:16:38 PM
Having just caught up with your build I have to say she's a beauty - great work Dom. :-))

Regards,

Ray.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 03, 2018, 08:42:53 AM
Thank you, Ray!
While I'm quite happy with the overall result, I wish that I had a bit more experience and skill (and yes, patience) when some detail work is concerned.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 04, 2018, 07:27:26 AM
Funnel time  :-)
After sanding and filling (and sanding again) I now glued in the base plate which then will screw to the roof of the cabin.
I glazed the inside of the funnel with a coat of epoxy for added stability, to prevent the structure from sagging with the hot exhaust fumes from the steam engine. It took ages for the epoxy to cure and I had to constantly keep the funnel in a rotary motion for almost an hour until it was viscose enough to let it sit alone.  <*<  But it was worth the effort as it left me with a smooth and uniform surface.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 06, 2018, 08:23:23 PM
I glued in the top of the funnel. A very heavy piece of white metal, which isn't necessarily what one likes to sit so far up above the water line. But there you have it.
After filling and sanding some more, it is now ready for priming and spray painting.


While the primer cures, I test ran the sound module with the speaker. Holy god, that thing is LOUD! I probably scared all the cats away and almost busted the window of my workshop  {-)  Let's hope I'm not gonna drain the lake with that honker  :-)


Dom
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 07, 2018, 08:29:49 PM
Finally it was time for a slab of paint. Perfect conditions outside for spray painting: nice and warm and not too windy. Only the occasional bug sitting onto the wet paint  %)
Test fitting the painted funnel onto the upper structure and everything fits nicely. I also drilled holes and glued in the rig lugs.


Next up: filing and sanding a bunch of white metal parts. May be a while until the next update.


Dom
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 10, 2018, 07:16:59 PM
Something about the appearance of the funnel bugged me, so I amended it with a white band between the buff and black. I think this makes all the difference in the world, doesn't it?
I moved the hull up into my office to free some space on the workbench since I'm now mostly working on the main upper structure.
Speaking of which, this also needs a resistor bank for the lights. The bank holds resistors for 6 warm white LEDs, one red and one green navigation light LED.
Although I probably won't need all 6 white lights, I like to have some spares. You never know  O0
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 11, 2018, 08:03:06 PM
Interior lights are working. I marked the pins for the red and green LEDs with red and green color so I will remember where to connect them when the time comes (they need different resistors from the whilte LEDs). Yes, I know I'm a genius  {-)
I fettled and sanded another batch of white metal parts. Some of them go to the funnel and some are bits and pieces for the cabin.
I noticed that one of four beams that will hold the small platforms beneath the life boats is misshapen, so I replaced it with a 3D print.
Some other smaller white metal parts will also be replaced with 3D prints - the door handles and some latches, for instance.



Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 12, 2018, 07:24:05 PM
A batch of fresh door handles and latches cooling down after the print.

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 13, 2018, 08:19:05 PM
Door handles are now glued to the doors. They're small and tiny but I think they look the part.
I then started assembling the evaporator. --> Any suggestions on the color scheme for this part? What would this have looked like?



Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 15, 2018, 07:58:09 AM
Slowly outfitting the funnel. The 4,5mm o.d. aluminium tubing for the pipes was missing from the kit (as is the 6mm one), but not a great deal. Or so you'd think. All hardware stores and model shops only carry 4 or 5mm tubes. I then went with a 4mm brass tubing since the holes in the white metal clamps are on the small side anyway (due to missaligned mouldings, it seems). The steam whistle is also made from the 4mm brass tube. I cut the lip with the dremel cutting disk and filed/sanded it until smooth.

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 18, 2018, 02:27:35 PM
Just as a funny side note, this is what she looked like one year ago (to the exact day, on June 18 2017). I think she came a long way, but the road is still long and winding  :police:


(http://www.modelboatmayhem.co.uk/forum/index.php?action=dlattach;topic=57420.0;attach=174676;image)
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on June 18, 2018, 09:08:57 PM
The whistle looks good as does your pipework. You did right to get the 4mm pipe I reckon.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 19, 2018, 08:29:26 PM
Thank you!  :-)


The electric parts (light board, fan and speaker) are now connected. I tryed to tidy the wiring a bit by using drinking straws. Alas, one piece came loose after soldering. I need to try another glue for that task, it seems. So far I've tryed Zap-a-gap and Deluxe Fusion.
Outfitting of the funnel and cabin also taking place. The deck extension beams for the life boats are now glued in place as well.
The... portholes? Scuttles? What do you call these in english? (Heck, I don't even know what to call them in German  {-) ). Anyway, I had to re-print the latches for these a tad smaller cuz they wouldn't fit. They're still on the print bed, waiting to be collected.
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on June 20, 2018, 09:53:18 PM
I know the round openings in the hull are scuttles, but so are the holes in the deck for access and coaling etc. A question for those on Mayhem with greater knowledge.
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on June 20, 2018, 10:02:23 PM
The hull openings are scuttle portholes. Those in the deck are scuttle coal hatches. Just namings.

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 21, 2018, 09:10:04 AM
So then let's just wait and see if something hatches. If so it then probably also scuttles  :police:
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on June 26, 2018, 08:41:09 PM
Another batch of white metal parts filed, sanded and cleaned. Ready for primer. There is so much detail stuff on the cabin alone it's almost a bit overwhelming. But one step after the other, I guess.
Once again, the plans are of not much help, not being in scale. But at least I can get a rough idea of what goes whereish.
I'm also glad about all of the pictures of finished Imaras floating about on the net to clarify this and that and also to get inspirations about colors for different parts  :-)
Title: Steaming Her up in the Tub
Post by: Tafelspitz on July 01, 2018, 06:48:46 PM

Because I otherwise have a bit of a boring task at hand (cutting lengths of wire for some grates), I decided to fill the test tub (aka our bath tub) and give her a Steam Up for testing purposes.
I'm happy to report that it all went very well. The aggregates are running smooth and the water stayed outside  :-)


I thought maybe you'd like to watch her, too, so I uploaded a short video of the even (https://youtu.be/30-n7xsN0Do)t to YouTube. Have fun and let me know what you think!



Title: Re: Building the CalderCraft Imara
Post by: hama on July 01, 2018, 08:46:58 PM
Nice!! She' s a real beauty and I look forward to seeing her on the water. :-))
Hama
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on July 01, 2018, 10:41:15 PM
Goodness Dom...I know I have mentioned some time back..... ;) ...but those engines tick over at low speed & start-up beautifully  :-))...,. Derek
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 02, 2018, 07:19:06 AM
Nice!! She' s a real beauty and I look forward to seeing her on the water. :-))
Hama


Thank you, Hama! Still a long way to go but at least she floats already  :-)



Goodness Dom...I know I have mentioned some time back..... ;) ...but those engines tick over at low speed & start-up beautifully  :-)) ...,. Derek


Yes, Derek, and you were right that the water resistance would smooth things even more than back when I test ran her in the dry dock.
BTW, I also put on the cabin structure (not on the video) to see whether this would affect the performance of the gas burner, which it didn't at all. Next time I will try it with the windows covered.


Dom
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 08, 2018, 08:15:43 PM
The towing hook is painted (but not yet weathered) and glued in place. No actual towing going to take place with this white metal part, though.
Cutting and sanding the brass rods for the grates was a lot of tedious work, but they're all done and painted now.
Rope guard rails are starting to take shape. When I drilled the holes for the latter I bored into one of the wires leading to the speaker underneath. D'oh!  %)
I ran out of stanchion bases, so I 3D-printed a couple more. I love that printer  :police:

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 17, 2018, 08:35:20 PM
Installing the rope guard rails after giving them a coat of paint or six. Incidentally, the Tamiya brand of spray paint must no longer be sold here in Switzerland due to environmental and health issues, so I switched to Revell.
When drilling the holes for the guard rails, the plastic chipped a bit in some places and I had to use filler to mend the flaws.
The lower water tank is almost finished but not yet glued in place.
Also building and preparing some more bits and parts to help procrastinate building the wooden cabin  ok2

I'm sure I got the wooden steering gear box wrong, but for the life of me I couldn't figure out how this part is meant to be. Neither the plans nor pics from the web were of any help so I decided to ad lib that part a bit. Looks a bit (too) creative maybe, but after sanding and filling, we'll see what it looks like.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 18, 2018, 08:20:40 PM
I don't know, but that steering gear box is a bit of a mess. So I sat down and replicated it with the CAD program. Will print it tomorrow, I hope it fits the white metal front.
I'm not much of a wood worker  :((
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 19, 2018, 08:37:51 PM
I printed a prototype of the gear box and it fits nicely. However, I noticed that there's very limited space between the flagstaff and the funnel since the deck is shorter than it should be according to the plans ( I remember reading that other Imara builders ran into the same problem).
I guess I'm going to shorten the gear box a bit, lest the steering wheel sits right next to the funnel  %)
The rope guards are now securely glued in place and paint has been applied to the joints. Speaker re-mounted below deck.
Some woodwork for the cabin is also looming. Provided I can figure out what goes where. Help!  {:-{
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 22, 2018, 07:28:58 PM
I finally bought a sorter box to sort all the small white metal parts. Speaking of which, I filed and grated another batch of these.
The steering gear box is assembled and ready for priming and painting.
Cut, sanded and glued the wooden platforms for the life boats with a little help from a piece of adhesive tape to get the spaces even.

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 25, 2018, 07:55:42 PM
I applied some weathering to the life boat platforms (still a bit wet on the photo).
The large cowl vents are made from the white metal parts from the kit (upper half and the handles) plus some custom made (i.e. CAD made and 3D-printed) bases glued together and filled/sanded with car body filler.
Some other parts and bits now waiting to be primed and painted. It's a bit too hot to spray paint outside, will have to wait until it cools down a bit.
I also bought (ordered) myself an airbrush set which partially arrived today. I guess this will take some practicing before I can and will use it on the model  :police:
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on July 26, 2018, 12:35:59 AM
Dom....

Just a general question on the Imara........why did she have a steering station aft of the funnel?  %)

Is this some form of emergency steerage?......with a large enclosed bridge, one would have thought the Skipper & steerage was performed from there?

Derek
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 26, 2018, 06:40:05 AM
Good question, Derek, and I wondered that myself. I can only assume that it has been used for manoeuvres like backing up since otherwise from the bridge the quite large funnel would have obstructed aft visibility quite a lot, I guess.
But then I'm only an inland landlubber and I'm sure there are more knowledgeable lads and gals on this forum who might shed some light on the subject  ok2


Dom
Title: Re: Building the CalderCraft Imara
Post by: Brian60 on July 26, 2018, 12:34:10 PM
There is this Facebook group... https://www.facebook.com/groups/RMASPortsmoth/   dedicated to crew and dockyard workers of the ships. Somebody there should be able to answer the question about her. You will have to join the group but that's as easy as just clicking the blue button.
The link works even though they have left the 'U' out of portsmouth!
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 26, 2018, 02:40:03 PM
Thanks, Brian!
Maybe somebody with a Facebook-Account can inquire there  :-)


Dom
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 26, 2018, 08:29:46 PM
The parts are now primed. Looking at some example pics on the net for possible color schemes. It's kind of interesting how many different looking Imaras there are out there. No two seem to be looking alike  :police:
One of the next steps will be building the cabin. Some wooden parts cut out but not yet sanded. Everything is supposed to fit together, something like so.... Wish me luck  :embarrassed:
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 28, 2018, 08:48:53 AM
There are some times when one needs to take a short break from model building and appreciate some other things.
Like the Lunar Eclipse last night. I set up my camera on the roof of our garden pergola and took some pictures of the event.
We also saw the ISS when it was passing by at around 22:34. What a spectacular view it was!
(In case you're interested, shot with Sony A99II with Minolta 500/F8 and Sigma 70-200/F2,8)


(https://www.dropbox.com/s/3bx2xtvp40kmaz2/DSC04495.jpg?raw=1)


Moon and Mars






(https://www.dropbox.com/s/g3279qdgg9zz1xy/DSC04439.jpg?raw=1)
Title: Re: Building the CalderCraft Imara
Post by: Dreadnought on July 28, 2018, 09:57:17 AM

That's some great shots you got of the moon their! :-))
Unfortunately the we had thunder storms and rain were I live in the UK last night so I missed it. :(( <:( 
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on July 28, 2018, 10:05:04 AM
Great pictures! But as Dreadnought says, it coincided with the temporary(!) end of our heatwave and was not visible from much of the UK, a real shame.
Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 28, 2018, 10:26:12 AM
Thanks, guys! Bummer you couldn't witness it  {:-{
Here's a couple more from when it started and when it ended.


(https://www.dropbox.com/s/6pxguiu5cxnbkll/DSC04396_DxO.jpg?raw=1)


(https://www.dropbox.com/s/4ywaq6qg56jfic5/DSC04514_DxO.jpg?raw=1)


(https://www.dropbox.com/s/s7w5z59i3uyii4s/DSC04559_DxO.jpg?raw=1)

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 29, 2018, 08:12:05 PM
Back on topic  :police:


I painted the wheel and the wheel gear box. Also painted the fire hydrants and the fire buckets. I use Tamiya brass polish for the fire hydrants and for the screw knobs on the wheel. Looks awesome (better in real life than on the pictures).
The tapered flagstaff (it's not really a FLAGstaff actually, but the translator always turns up with that expression) is 3D-printed from two parts bolted and glued together. Not yet filled and sanded. This pole was supposed to be made from a piece of round timber, but since I don't have a lathe... well, I could have used the drill and sanding paper, of course. But since I do have the 3D printer, why not go down that route.
I'm even considering making the main mast this way, probably from 5 parts, all tapered in the right way and glued together with a piece of steel peg between them for stability and guidance. It's also supposed to have a small crease along its length for the lamp wires. I'm not sure they will print, though. Tall structures like that are a bit difficult to print.


 
Title: Re: Building the CalderCraft Imara
Post by: nmbrook on July 29, 2018, 10:48:40 PM
Awesome work Tafelspitz.The twin steam engines really set this model apart.Even Caldercraft anticipated most would only ever fit one,hence the single screw version.


I am a little surprised at the poor quality of some the fittings.Having spent a good number of years doing period ship modelling,I regard Caldercraft as one of the best kit manufacturers in that field.


Regards


Nigel
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 30, 2018, 07:14:50 AM
Thanks, Nigel!


Having no other kits to compare this one to, it's hard to tell how the Imara compares to other kits.
But to put things a bit into perspective, though: the kit contains literally hundreds of fittings and most of them are OK. It's just about 3 or 4 pieces so far that suffer from really bad quality (the life boat support beam and the aft capstan come to mind), with a hand full of others suffering from more or less missaligned mouldings. This is of more concern with smaller parts since the relative error is much bigger in these. You can only file and sand so much on tiny parts. I can easily replace some of these with 3D-prints (like the stanchion bases and latches), but not everybody has this opportunity.

That said, I think the overall quality of the kit is quite good. The moulds may have suffered a bit from wear and tear over time, but it's far from bad. I would buy it again.

Me not being very experienced in model building is another big factor. I have learned a lot so far (not least from this forum) and given the opportunity to start over, I would do a lot of things differently now. The build also gave me a good excuse to upgrade my shop with some nifty tools. Amongst the things I bought in the last year or so are a drill press, circular saw, disc sander and now an airbrush kit :}

Dom
Title: Re: Building the CalderCraft Imara
Post by: Colin Bishop on July 30, 2018, 10:04:12 AM
Poor quality fittings do sometimes get through 'quality control. However, the manufacturer should replace them free of charge on request.
It is also true that some white metal moulds have passed their 'use by' date when they should have been recast from the masters.

Colin
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 30, 2018, 08:43:22 PM
I couldn't resist and printed two of the parts for the mast (the middle two of four). This took about 2 hours and despite my skepticism turned out well. I don't know yet if my calculations and CAD conversions added up, the parts are still cooling down. Will check that out tomorrow.
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on July 30, 2018, 08:49:08 PM
You are doing a fab job there Dom! The lifeboat platforms and steering box are lovely pieces. If the metal parts are cast in a centrifugal mould then the misalignment is often caused by the mould being spun too fast. Moulds will indeed harden and erode over time becoming very hard in extreme cases especially in the centre reservoir area. Mould replacement needs keeping on top of, and if the company has their own press then isn't too expensive to do unless they are using very large moulds.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on July 31, 2018, 07:43:00 AM
Thank you, Sir!  :-)
Interesting insights into the moulding technique. I had no idea how this was done. Seems to be an art in itself  O0


Dom
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on July 31, 2018, 08:14:27 PM
Yes, part art, part science! I have cast 10 kilos of white metal model parts in the last two days. That is a lot of figure strips and vehicle parts in 1:300th  :-)
Title: Worksop Show
Post by: Tafelspitz on July 31, 2018, 09:26:00 PM
10 kilos  %%  Wow. You wouldn't happen to have a couple of pictures to show, would you?


While I'm waiting for the airbrush kit to arrive, I decided to clean up my workbench a bit. While I always try to maintain a certain level of tidiness, there's always some stuff cumulating over time.
I thought I might as well give you a small tour of my workshop while I'm at it  :-)


I have an old closet where I store some tools and also the parts of the model kit that are yet to be built, painted, glued... and also some other bobs and pieces I have no idea where else to put.
You can see my ever growing collection of glue, the weathering kit (weatherall, rustall, and scenic rust, amongst other things).
In another compartment I keep my Dremel kit, circular saw, lab power supply, drills and what not.
We also keep a big refrigerator in one corner of this room which prevents me from expanding all the way to the right, but that's not necessarily a bad thing  :}
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 01, 2018, 08:58:42 PM
Meanwhile, all 5 parts of the mast are printed. They came out very well, I only had to re-print one part once because the groove was not deep enough. Had to quickly go back to the drawing board.
I printed the parts in Tough PLA, a new material that is as easy to print as regular PLA but stronger and less brittle.
The segments have holes in them to better align them with short rods and also to improve mechanical stability at the joints.
Glued everything together and I think it came out pretty straight. Only the top element seems to be slightly slanting, but I may be able to amend that by heating and bending it slightly.
Some filling and sanding will be necessary, of corse.

Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on August 03, 2018, 09:31:26 PM
That is a tidy way of doing the mast Dom. I will take a picture of some castings next week.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 05, 2018, 04:28:35 PM
I just inaugurated my new airbrush kit and the spraying cabin. I guess there's a steep learning curve in using this tool properly, but already i think from these two easy parts that I used as guinea pigs that the surface gets a lot more even than with anything I ever could achieve using brushes.
The flagstaff is now painted and glued in place, as are the fire hydrants and the aft steering box.
I also spray painted the upper water tank (using up my supply of Tamiya rattle cans) and encountered a small problem when a bug decided to land on the wet surface  %)

Title: Re: Building the CalderCraft Imara
Post by: nmbrook on August 06, 2018, 05:01:59 PM
The superstructure is looking really sharp,super work Dom.I recently downloaded the free emachineshop CAD software from Shapeways site with the idea of having a few parts printed by them.Been too busy building the big bits to have a go with it yet.It seems fairly simplistic,but that suits me.Last time I used CAD was at college in the late 80's and that was with one of the first 3D modeling programmes.
I had hoped some of the items might be listed on the shapeways inventory,they may be,but gave up for now when I had spent 3 hours trolling through stuff %)


Regards


Nigel
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 06, 2018, 09:08:41 PM
Nigel,


I don't know emachineshop CAD, but will check it out one of these days... I'm using TinkerCAD, which is also free and it runs in your web browser. So no need to install any programs. It was the only program that I could use from the go. Ostensibly it's fairly simplistic, but it's also powerful and, most importantly, intuitive to use - at least for me. You can't do organic models (like faces and stuff), but for mechanical and geometrical parts it's pretty easy to use.
I only knew my way around 2D vector graphics (CorelDraw, Inkscape and the like) and apart from the additional dimension, I felt right at home with TinkerCAD. I also test ran some other programs (can't remember their names) but was all but lost.


In the dry-dock today, I painted the inside of the large cowl vents (using a paintbrush since I didn't knew how to to mask it off for airbrushing).
When soldering resistors, I always put the lengths of "legs" that I cut away aside to use them for wire bridges. They came in handy today for making some handles for the fire buckets. I bent them around a 9mm drill and using needle-nosed pliers, I bent the ends to fit into the bucket holes.
I then filled the buckets with some epoxy with a faint bluish tint to emulate water.


Dom
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on August 06, 2018, 11:04:54 PM
So Dom says.......'then filled the buckets with some epoxy with a faint bluish tint to emulate water' ...

With the warm weather you are experiencing the evaporation may be a little high....so that is why [on ships] they fill the buckets with sand

Scale sand?.... %)  maybe try a model train supplies shop  .....just put a small heaped dusting over the epoxy.....then the finest wisp of a Polyurathane spray to seal the top surface [with your new airbrush]

Derek
_________________

PS...that is a very snazzy model sized vacuum spray booth...... :-))

1. is it a commercially produced unit?
2. does it connect to a domestic vacuum cleaner?
3. can you get a miniature Lazy Suzan rotatable table for it?

[If the answer to each is yes, this would then alow your neighbour Danielle [also from Switzerland] to spray paint in her kitchen {-)
Title: Spray Booth
Post by: Tafelspitz on August 07, 2018, 06:54:09 AM
With the warm weather you are experiencing the evaporation may be a little high....so that is why [on ships] they fill the buckets with sand

Sand... I never would have thought of that. But of course, now that you mention it, it makes perfect sense, Derek O0
(Also for the crew to stub out their fags, I assume  :} )



PS...that is a very snazzy model sized vacuum spray booth...... :-))

Thank you, Sir!

1. is it a commercially produced unit?
2. does it connect to a domestic vacuum cleaner?
3. can you get a miniature Lazy Suzan rotatable table for it?

1.: Yes, it is indeed. This is where I got it (https://www.conrad.ch/de/airbrush-absauganlage-206465-206465.html).
2.: No, it comes with its own blower which connects to a length of flexible tubing. I simply hang the latter out the window when in use. The whole thing is a tad bulkier than I have anticipated, but I stow it away under the table (next to the airbrush compressor) when not in use.
BTW, I would also highly and strongly advise against using a vacuum cleaner to aspirate any flammable fumes like from spray painting!
3.: You can't see it very well on the picture I posted above because it is black, but there's one inside the cabin under the round(ish) piece of paper. It comes with the booth.


Dom
Title: Sandy Stuff
Post by: Tafelspitz on August 07, 2018, 08:14:30 PM
Sand.
So I went to the local grocery store and beelined to the pet food corner to grab a pack of bird sand. After sieving a portion through a tea sieve to get rid of the larger seashell and cuttlebone fragments, I was left with some fine grained sand. I used clear canopy glue to glue the sand on top of the epoxy. The sand may be a bit on the light side, color wise, but once the glue cures, it should darken things a bit. At least that is my theory  %)
Since I got one bucket too many, I left that one with "water" for the crew to swab the deck.
Title: Re: Building the CalderCraft Imara
Post by: ballastanksian on August 07, 2018, 08:23:01 PM
A dab of thinned paint (sand coloured mon naturel  :} ) will finish those buckets off nicely. I love what you are acheiveing Dom  :-))
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 07, 2018, 08:37:03 PM
Brilliant idea! I will see to that tomorrow. I have still about 1,998 kg of sand left for some color tests  {-)
And thank you, in general, for encouraging me. That really means a lot to me!
Title: Re: Building the CalderCraft Imara
Post by: derekwarner_decoy on August 07, 2018, 10:31:23 PM
I wouldn't trust that Fireman Freddy....you know the old story, 'that most Fireman were pyromaniac's as youngsters'.... don't you  O0

1. So if sand is silica, why not try adding a table spoon [from the 1,998 kg of sand left for some color tests] and mix it with another  table spoon of common salt, then sprinkle this into a little red bucket........then pour a teaspoon of strong tea from your teacup........let it evaporate & the sandy tannin colour will remain  {-)

If you are happy with the colour...try the next logical step

2. mix 1 tablespoon of sifted silica + 1 tablespoon of common salt + 1/2 a table spoon of sugar....then sprinkle this into a little red bucket........then pour a teaspoon of strong tea from your teacup........let it evaporate & the sandy tannin colour will remain  {-)

The sugar when evaporating and whilst returning to it's original crystalline state will also coat each of the silica and salt granules as a binder & stick the mass as one :-))....so no need for polyurathane spray

Derek
Title: Enter Sandman
Post by: Tafelspitz on August 11, 2018, 06:38:48 PM
Thank you for you suggestions, guys!  :-)


A dab of paint was indeed all it took to darken things up.


Dom
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 15, 2018, 08:52:53 PM
Another batch of white metal parts grated, filed and sanded.
This lot contains pulleys for the steering chain, some parts for the mast and a couple of assorted bits and pieces.
I also gave the mast a first tentative sanding. I have not yet decided on the best sequence to fit everything together without one job getting in the way of the next (wires, lamps, filling, sanding, painting, soldering, fitting the fittings et cetera). I guess I will actually have to sit down and make a plan to figure this out.

Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 20, 2018, 07:29:50 AM
I'm getting pretty good at making tapered masts with my 3D printer. The yard for the main mast was a bit challenging as it is rather delicate.
First I tried to print it in only two parts, but at 4mm at the base and 2,5 mm at the top with 7,5 mm height each and a 1,5 mm bore, that was just pushing it. After approx. 5 cm height, the print failed. The parts were just too delicate and labile. So back to the drawing board and breaking up the yarn into 4 pieces of about 3,75 cm each.
Printing all four parts simultaneously at a relatively low speed to give the material enough time to cool down between layers did the trick. Using the tried and tested method of inserting a length of 1,5 mm steel rod for additional strength between the parts left me with a minimum of filling and sanding.

Apart from this, I'm painting and fitting the parts for the steering linkage and some other stuff. I darkened the steering chain using Ballistol brass dye. If I only knew about this method back when I painted the anchor chains %)
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 21, 2018, 08:11:23 AM
Steering linkage chain is now complete. I noticed a small problem... the pulleys for the chain will be in the way of the life boat davits... as they are supposed to line up with the small flagstaff mast thing. They will end up offset a bit, no other way of doing this now, I'm afraid. As noticed earlier, the deck structure is a bit shorter than it is supposed to be according to the plans and layouts. Oh well, not a big deal, but a bit annoying none the less.


The yarn is ready for priming. I'm waiting for some thin copper wire (0,1mm) for the mast lights that I have ordered. The wire I bought some months ago turned out to be too thick for this job (0,3mm) since I need to fit 6 wires into the mast (well, technically I could use only 4, but that would make the soldering a bit too complicated with the tiny SMD LEDs I'm using).
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 27, 2018, 08:09:03 AM
Once again I found myself replicating some white metal parts from the kit with the 3D printer. This time I went for the lamp pedestals. There was nothing wrong with the white metal parts this time, but since I'm going to fit the lanterns with SMD LEDs, I was a bit afraid that the white metal base, being conductive, may short my circuit. So better safe than sorry and go with plastic. The prints turned out very well and I already designed them with a 4 mm hole for the SMD LED. They will need some minor sanding to rid them of the ripples from the print.


Meanwhile on the mast, I pulled in the six copper wires and secured them with super glue. Next up will be filling and sanding the wire groove.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on August 27, 2018, 09:03:01 PM
Some more progress on the mast. The wire groove is now filled and sanded and everything glued together.
I made two small mistakes, though. The super glue on the lowest ring cured before I got it aligned the right way, so the four lugs are not symmetrically positioned. Not a big deal since this ring doesn't hold any cables, only some kind of bolts. And second, I put on the yard mast the wrong way around, so the small gap in the white metal cleat is facing up instead of down. Also not a biggie, just a bit irritating  %)


And when was the last time you had a great idea that felt like a, well, really brilliant idea on paper at the time but turned out to be kinda stupid in practice? Well, I just had one of these today when I thought it was a good idea to protect the tiny and delicate copper wires for the lamps from physical stress by sticking them between two pieces of duct tape. Yes, stupid, I know (now)  <*< I eventually got them out of the sticky mess and I sure hope they are still OK {:-{


Next up priming and painting and then fitting the lights.
Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 16, 2018, 07:45:19 PM
Hey guys, what's cooking?  :}
After two weeks of vacation at the German North Sea I'm back in the shop. Airbrushing the mast, worked a treat. The base is not yet painted (green) and after that it needs a couple coats of matte varnish.
Unfortunately the wires for the topmost lantern broke off right at the mast from manipulating them a bit too often... bummer. No way to fix this now. And just as I was in the process of protecting the points where the wires exit the mast with a drop of glue. Oh well, if I'm not mistaken, the topmost light would only be lit if she was towing, right?



Title: Re: Building the CalderCraft Imara
Post by: Tafelspitz on September 30, 2018, 03:14:22 PM
Mast is done  :-))
After painting, varnishing and fitting the lamps I gave the lights a test run. As mentioned above, the topmost light ain't working because I accidentally broke the delicate wires. But as the thirt light would only be lit when towing, this actually adds a touch of realism  ok2
After test fitting the mast and making the electric connections to the resistor board below deck, it was showtime: Using a line laser, I aligned the mast and then glued it in place.
I think she slowly starts to look like a ship, don't you think?