Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Working Vessels => Topic started by: ir3 on June 24, 2013, 10:31:50 pm

Title: Iran's Envoy tug build
Post by: ir3 on June 24, 2013, 10:31:50 pm
I am starting an Envoy build and will be installing a Saito T2DR Steam Engine. I will have some questions over the build period and hopefully I can continue posting them here on this thread.

The prop shaft is M5 x .8 and the Saito output shaft is 4mm. Searching the internet I found several suppliers of a do it yourself coupling where I can put a threaded insert in one end and a smooth insert in the other end. M5 inserts are readily available as well as the 4mm smooth insert. Never having used one of these couplings and not available in the US, I sent requests to several suppliers asking if I am on the right track but no response. Am I on the right track and should I just order the parts and not wait for a response. It is very frustrating that very little or no hardware of this type is locally available.

Any suggestions would be appreciated.

Thanks,

Iran Ausley
Title: Re: Coupling For Envoy Build
Post by: essex2visuvesi on June 25, 2013, 06:23:02 am
First question... where abouts are you?


If you mean the Huco type coupling
(http://www.prestwich.ndirect.co.uk/whc1pe2E.jpg)
then they are ok but a little noisy in operation and in my opinion look wrong next to a steam engine.
Have a look for an all brass or all stainless version.
I have seen on the web somewhere someone makes all brass ones to your requirements, but can't find it now


Or these ones
http://modelboatbits.com/shop/category_POWERFLEX%2520COUPLINGS/POWERFLEX-COUPLINGS.html?sessid=B4Ce7uUPEzffOyf21ggUJ1stGcArKwW85JEHp4uXceHL37oNiCYR54wcWPNFzCfj&shop_param=cid%3D%26 (http://modelboatbits.com/shop/category_POWERFLEX%2520COUPLINGS/POWERFLEX-COUPLINGS.html?sessid=B4Ce7uUPEzffOyf21ggUJ1stGcArKwW85JEHp4uXceHL37oNiCYR54wcWPNFzCfj&shop_param=cid%3D%26)
If they dont have what you need on the website email them and they will make it up for you
Title: Re: Coupling For Envoy Build
Post by: derekwarner on June 25, 2013, 06:52:36 am
Hi ir3.......this is Derek from PD's..... %) .......
You could search her on Mayhem......there was recently a long thread about couplings & their shortcomings  >>:-( will your engine be seen next to the coupling?.......
20 years ago I used the HUCO coupling as shown by e2v.....& had no issues what so ever running it with a 12 volt car ventilation fan motor........no vibration at relatively low speeds
1. Why not post some pictures of the Envoy
2. Are you going with a conventional gas fired boiler this time?........Derek
Title: Re: Coupling For Envoy Build
Post by: essex2visuvesi on June 25, 2013, 07:16:00 am
Hi ir3.......this is Derek from PD's..... %) .......
You could search her on Mayhem......there was recently a long thread about couplings & their shortcomings  >>:-( will your engine be seen next to the coupling?.......
20 years ago I used the HUCO coupling as shown by e2v.....& had no issues what so ever running it with a 12 volt car ventilation fan motor........no vibration at relatively low speeds
1. Why not post some pictures of the Envoy
2. Are you going with a conventional gas fired boiler this time?........Derek


Don't get me wrong that style coupling is perfectly servicable, but when fitted alongside a steam engine it looks cheap.  After spending god knows what on a steam setup why ruin it with a plastic coupler?
Title: Re: Coupling For Envoy Build
Post by: ir3 on June 25, 2013, 07:26:06 am
Hi Derek, e2v,

Nice hearing from you. A lot has happened since my short stay at PD's. The Delta Queen and the running gear for it have moved on. I started back in giant scale model aircraft until I found my desire was bigger than the space I have to store them so it's back to boats. I liked the idea of a steam powered Envoy Admiralty version. Easy build and easy to manage.

The power plant is a T2DR and a Macsteam boiler. I am in the early stages of the build and I am at the point where I need to do the initial fitting of the steam engine to the prop shaft. I have an order in for the HUCO coupling but I like the couplings that e2v suggested and will probably order some parts from them also. I can experiment with both.

I didn't plan on a build thread but perhaps I will. The only build threads are with electric so this one could concentrate on the steam plant installation.

I will either start a new build thread or just update this one.

Until next time,

Iran
Title: Re: Coupling For Envoy Build
Post by: derekwarner on June 25, 2013, 08:10:55 am
ir3.....there are may steam build threads here on Mayhem...so if you feel disposed ...please use this tread for your build........as time progresses you can ask a Moderator the retitle the thread & this way we capture everything from day 1
The decision to use a Macsteam boiler sounds a good idea :-)) 
I understand exactly what e2v is saying about the visual of couplings on steam engines & have recently taken delivery of two flywheels from Winfried Niggle to act as coupling's on my Y2DR horizontal SAITO engine........ the down side is they have naturally have no resilience at all  >>:-(  ...so will need to think more about this ....Derek
Title: Re: Coupling For Envoy Build
Post by: Martin (Admin) on June 25, 2013, 08:47:23 am

Sure, what title would you like?
Martin
Title: Re: Coupling For Envoy Build
Post by: oldiron on June 25, 2013, 11:29:57 am
You may find this thread of interest with regard to model boat couplings:

http://www.modelboatmayhem.co.uk/forum/index.php/topic,33847.0.html (http://www.modelboatmayhem.co.uk/forum/index.php/topic,33847.0.html)

John
Title: Re: Coupling For Envoy Build
Post by: oldiron on June 25, 2013, 11:35:49 am
  The posted thread continued on to:

http://www.modelboatmayhem.co.uk/forum/index.php/topic,41338.msg415414.html#msg415414 (http://www.modelboatmayhem.co.uk/forum/index.php/topic,41338.msg415414.html#msg415414)

another good read on the subject:

http://www.modelboatmayhem.co.uk/forum/index.php/topic,42205.0.html (http://www.modelboatmayhem.co.uk/forum/index.php/topic,42205.0.html)

John
Title: Re: Coupling For Envoy Build
Post by: ir3 on June 26, 2013, 06:54:54 am
I have the Powerflex coupler on order. It will be a while but with the length of the coupler I can position the engine with a dummy part made from dowell. Now comes some other basic questions. The steam engine will either be mounted on rails or a plywood board. I plan on completely painting the interior of the hull in gray. I will be water proofing everything that will go into the hull. Do I need any special treatment for mounting the steam engine, i.e. insulation.

For the boiler, it will be hidden but I am told that putting the cladding on will improve the efficiency of the boiler. Should I put on cladding?. It seems that the interior of the hull surrounding the boiler should be protected with perhaps aluminum foil or some kind of insulation.

As you can see, I have never completely installed a steam plant before but I have one or two more projects lined up after this one so the experience gained here will be very useful.

Once I start laying out the steam plant installation I will be asking the moderator to change the name to "Envoy build with steam engine installation" Since the rest of the build is quite ordinary, the thread will deal mainly with Steam Plant issues.

Thanks for all the help,

Iran
Title: Re: Coupling For Envoy Build
Post by: Jerry C on June 26, 2013, 10:32:43 am
This all sounds very interesting and I am looking forward to the rest of the build and lots of pictures. I have no experience of enclosed steam plants so I defer to others who have. I would say however that the whole plant should be quickly and easily removeable from the model in one piece. This is for fueling, cleaning, oiling, drying and adjusting/repair. Make any water connections to the hull using silicone tubing as this can easily be popped off and replaced many times with the fingers. Servo linkages need to be designed and arranged with simple, easy removal in mind. The propshaft coupling also needs to be simple and easy to join up and separate. In use a steam plant splashes an appreciable amount of oil and water and as such, although the boats inner compartments have been waterproofed, this still needs to be removed to avoid mould and worse. The words plywood, heat, water and oil don't mix even if marine ply. Mounting your steam plant on an aluminium or brass tray with the edges turned up and the corners sealed goes a long way to ease removal, contain water and keep the boat clean. The boiler and any steam pipes should be lagged for efficiency reasons but also to avoid burnt fingers when fiddling around when things is hot. I can't speak about insulating the boat itself. My launch is an open boat with only a canopy. Nothing outside of the tray gets hot. A dolls house bucket mounted close to the Maccsteam burner secondary air vent does get hot as does the lower sight glass fitting which causes the water in the tube to bubble. This was cured by a small aluminium screen.
Jerry.
Title: Iran's Envoy tug build
Post by: Martin (Admin) on June 26, 2013, 12:53:42 pm
 
Topic renamed.   :-)
Title: Re: Iran's Envoy tug build
Post by: craggle on June 26, 2013, 03:00:19 pm
Is this a model slipway kit you're building?

Just curious if your building from the kit or scratch building? I have the model slipway kit and built it as electric power as I figured once the cabins were in place you wouldn't see any of the nice steam bits anyway.

Interested to see how it goes though so post lots of pictures.  :-)


Craig.
(http://i227.photobucket.com/albums/dd126/craggle427/photo.jpg) (http://s227.photobucket.com/user/craggle427/media/photo.jpg.html)
Title: Re: Iran's Envoy tug build
Post by: Circlip on June 26, 2013, 03:25:45 pm
Use Shuttle teknowleggy for engine/boiler room lining, Ceramic paper 3mm (1/8") thick and make sure all pipes a lagged and all vents from engine room work to save starving the burner of air. Lagging boiler is also an advantage, keeps heat in and saves burnin yer ands. :}
 
  Regards  Ian.
Title: Re: Iran's Envoy tug build
Post by: ir3 on June 28, 2013, 01:11:12 am
Well, I guess one has to start at the beginning. The ports are cut in the hull and deck shelves are in. The stuffing box is in temporarily to get the steam engine placed. With the position of the prop shaft, the engine sits about 5mm above the hull which allows the output shaft to line up. Not being a metal worker I am putting the engine on hardwood blocks and will work the blocks down to get an exact fit or the engine output shaft to the prop shaft. I have a Powerflex coupling being assembled for me and a backup. In the meantime, when the garage cools down a bit I will make a dummy coupling of the correct length in order to get the steam engine mounts in correct alignment.

Two basic pics to follow:

The first just showing the engine on the raw wood mounts with wood screws. These will probably be switched out for machine screws and blind nuts before fastening the mounts to the hull.

The second shows the relative position of the engine, 52mm back from the stuffing box. The length of the Powerflex coupling is 52mm so I will probably mount it about 55-56mm back from the stuffing box.

Until next time,

IR3

P.S. I forgot to mention that the difference in height of the prop shaft and the output shaft is 4mm so I have a good deal of wood to work with to get the alignment exact.

Title: Re: Iran's Envoy tug build
Post by: ir3 on June 28, 2013, 08:23:31 pm
The mounts for the steam engine are complete. The pic shows the engine temporarily in place. The engine is vertical and very close to being on the center line. My wooden temporary coupling is not exactly centered.

Next operation is to get the prop shaft epoxied in place. The blind nuts need to be installed on the engine mounts and then they will also be epoxied in.

Looking ahead, Derek, if you are following this I need to make an exhaust manifold. I like what you did on the Y2DR. Did you get all the parts from Winifred. Could you send me a list of the parts that I need to order. Thanks in advance.

Until next time,

IR3


Title: Re: Iran's Envoy tug build
Post by: derekwarner on June 29, 2013, 12:36:12 am
ir3........those 4.06 mm OD exhaust tube are orientated differently with the 2DR to the Y2DR  >>:-( ...however
Winfried manufactures 2 bolt flanges which are o-ring sealed....so I asked him to manufacture 5 pr of flanges [16 OD] to suit 4 mm OD tube and 4 x M2.5 bolt holes    #140 420, however without gaskets but with o-ring sealing
 
The 4 mm tube equal tee piece is not his but his equivalent part number is # SP 115 104
Naturally the Niggle fittings accepted the 4.06 mm OD Japanese brass tubing
Both the Y2DR & the 2DR have the original lubricator as the last component prior to the engine steam inlet port.........the instructions with my steam regulator valve that it should be placed after the lubricator....so I removed the original Saito lubricator and installed a Niggle quartz tubed lubricator on the discharge side of the boiler
I find Winfried a great guy to deal with........ :-)) ....Derek
 
Title: Re: Iran's Envoy tug build
Post by: derekwarner on June 29, 2013, 01:54:48 am
ir3......just a few things
1. I am sure the Niggle 2 bolt o-ring sealed oval flanges would be totally acceptable......it was the low cost differential between 2 bolt & 4 bolt & so chose the added visual aspect of the 4 bolt
2. The way Winfried markets these flanges is most competitive with conventional tube unions  O0  & so much more realistic
3. I am not a fan of considering using a 1.2 mm thick full face gasket in a 16 mm OD  flange  >>:-( ...you really need to use a 1.2 mm metal spacer during the soldering process or the flanges will never be truly square when the gasket is installed...just so much easier bolting the o-ring sealed versions up [without o-rings %) ]....soldering & the final joints can be assembled complete with the O-rings etc
4. What brand or type of R/C controlled steam regulator will you be using?
6. Check the Niggle WEB site to ensure that I have quoted the correct numbers............Derek
Title: Re: Iran's Envoy tug build
Post by: ir3 on June 29, 2013, 02:08:56 am
Hi Derek,

Thanks for all of the excellent input on the fittings. Yes, the T2DR has an exhaust port that just clears the reversing lever. I have to check the space that I have to see if I can re-orient them. I do not have a RC steam regulator as of yet. That is next. Taking your lead I will be ordering a lubricator from Winfried as well as the fittings. I did order some items from him back in the DQ days and yes, a delight to deal with.

Cheers,

Iran
Title: Re: Iran's Envoy tug build
Post by: Jerry C on June 29, 2013, 09:08:19 am
I have been admiring Derek's flanges and have heard of winfried before but never found the website until this am. It's the spelling of Niggel that has thwarted me. I thought it didn't look like a German word. Anyway for those who haven't found it it's www.modellbau-niggel.de (http://www.modellbau-niggel.de) Some very nice kit on there.
Jerry.
Title: Re: Iran's Envoy tug build
Post by: derekwarner on June 29, 2013, 09:54:18 am
Sorry... a little off track.........I put http://www.modellbau-niggel.de/ (http://www.modellbau-niggel.de/) on the PD's link WEB site a few years back....& had just assumed MBM knew of this manufacturer
As previously mentioned.........Winfried is a great guy to deal with :-)) ........
ir3 won't mind the intrusion as he is a  http://www.modellbau-niggel.de (http://www.modellbau-niggel.de/) supporter  O0 ............Derek
 
Title: Re: Iran's Envoy tug build
Post by: ir3 on June 30, 2013, 05:15:18 am
No problems, any information that is helpful is certainly welcome on this thread. I started on the rear deck plastic this morning. Several problems have arisen. The styrene under deck was too big for the shape of the hull and needed some trimming. The instructions provide for that but the issue comes from the fact that the installation of the deck supports must be done very carefully. Apparently I must have cause the hull to bow in when the supports were installed. I strongly recommend that spacers be used when installing the shelves to make sure that the hull is not pulled in. I will have to install spacers but they will not show and do not hinder the installation of the deck.

It appears that the steam engine will be a tight fit and not directly under the hatchway. It will require a little shaving to get the engine in properly and I now need to think of how I am going to plumb the engine so it can be removed.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: derekwarner on June 30, 2013, 07:58:37 am
ir3......... >>:-( you have a few space issues here......
1. the T2DR engine steam inlet manifold can be reversed 180 degrees so it is facing AFT ....this would also allow for the alternate Niggle quartz tubed lubricator to be installed FWD  of the steam regulator & engine where both would be accessible for maintenance ........
2. the FWD cylinder head cover appears to have every little clearance with the decking.......that same cylinder head cover will get to say 130 degrees C  <*< during use & this radiant heat will I suspect melt the decking above <:( .........
Possibly best to review a few points prior to installing the decking........Derek
 
Title: Re: Iran's Envoy tug build
Post by: ir3 on June 30, 2013, 05:08:00 pm
A simple fix to the clearance problem was to cut out the deck coaming revealing significant space to manage the maintenance/removal of the engine. The deck still has to be moved aft several mm to complete the exact fit. As far as insulating the deck I defer to the experienced. Should I use the ceramic paper suggested in an earlier post or just use some reflective aluminum foil, or maybe nothing since there is now plenty of clearance.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: andywright on June 30, 2013, 08:51:40 pm
Mobile Marine Models will do a coupling  that will take your Saito twin. You will need the heavt duty one.


http://www.mobilemarinemodels.com/ (http://www.mobilemarinemodels.com/)
Theycome highly recommended, just drop them an email for a price.


Regrds Andy
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 01, 2013, 07:45:42 pm
Thanks for the link Andy. I looked at those couplings and found the Model Boat Bits coupling more suitable for this installation. With all of the various steam parts coming from the EU which will take some time, I started working on fitting the rudder and the main casting to the hull. The moulding of the keel to the hull did not come out perfectly vertical  <*< <*< <*< and created a problem installing the rudder mount casting. It is difficult to see in the picture but the keel is slightly angled to starboard. Unfortunately  :(( I will have to work with it as it is. I have no idea if this is just a bad layup or is typical with this hull.

The rudder support and hinges need a good deal of work to get a reasonable fit. The pic shows the rough workup of the rudder mount. Nothing spectacular but a lot of work.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 02, 2013, 12:31:25 am
The rudder is temporarily in place. I spent a lot of hours on this. Nothing lined up including the plastic rudder halves cutouts, the rudder hinges and the rudder mount. I just hope that this is the worst of getting parts to fit. BTW, when they say that once the rudder is in it is in. The only way this is going to be removable is if the rivet holding the bottom of the rudder bracket to the hull becomes a removable fastener. Make sure you have the rudder exactly as needed before assembling to the hull.

Next update wont be for a few days.

Cheers,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 04, 2013, 02:32:33 am
I spent the last couple of days fitting the decks, making spacers, and some of the hatches. I have enough now to start considering the location of the Steam Plant components.

The first picture shows where the boiler must go. With the deck properly in place, the stack is located directly under the ships smoke stack shown by the sloppily placed main deck. With the boiler in this position and making the wheelhouse removable as well as the hatch will give me access to all of the necessary connections. This creates a monster with all of the rigging involved. If I turn the boiler around, I can't get to any of the connections as there is no access between the rear of the front hatch and the front of the rear hatch with the engine just under it.

The second picture just shows the boiler standing alone and the third shows the boiler and fuel tank which will just be accessible through the main forward hatch. I see in the pic that the fuel output fitting is pointing the wrong way. The fuel tank can be reversed. The only remaining issue is where to locate the puke tank. It could go forward which would put it under the wheel house or I may find some room behind the engine going aft.

So it is rubber meets the road time and I suggestions will be welcomed.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 05, 2013, 06:30:01 pm
I have a problem. I assembled the rudder per the plan including the rudder post bearing within the hull. The way I see the plans, the instructions, and the side view of the Envoy on the cover of the instruction manual, the rudder can lift up out off the pintals. I am including some pictures of what the assembly looks like. It appears that the pot metal on the rudder stock does not extend up into the bearing above the hull. I believe it is this close fit within the bearing that keeps the rudder from becoming unshipped. I have an email to Model Slipways but perhaps someone who has built this model can look at the pictures and tell me what is wrong.

Thanks,

IR3

Note that the rudder frame has not been permanently mounted yet.
Title: Re: Iran's Envoy tug build
Post by: Tug-Kenny RIP on July 06, 2013, 10:59:56 am

It looks like the rudder tube should be coming out through the bottom of the hull. This will stop the rudder itself from lifting.

Hope this helps

Ken

Title: Re: Iran's Envoy tug build
Post by: craggle on July 06, 2013, 11:20:05 am
No, You do have this correct, Or at least it's the same way as I built mine.

I noticed this problem myself but carried on with the build and you will find that once the deck and the rudder hatch cover is in place the rudder really can't lift up that far as it will hit the cover.

I ended up measuring the amount of lift I could get before the rudder post hit the hatch then glued an equivalent length spacer on top of the rudder post above the rudder arm. I just used a stack of plasticard left over from the rest of the boat. Add a spot of grease on the top then clip the hatch cover in place and no more chance of it lifting off.  :-) 
Looks like I got a bit carried away when I used the car body filler around the rudder post!  :}

Craig.

(http://i227.photobucket.com/albums/dd126/craggle427/Rudder/IMG_1628.jpg) (http://s227.photobucket.com/user/craggle427/media/Rudder/IMG_1628.jpg.html)

(http://i227.photobucket.com/albums/dd126/craggle427/Rudder/IMG_1629.jpg) (http://s227.photobucket.com/user/craggle427/media/Rudder/IMG_1629.jpg.html)

(http://i227.photobucket.com/albums/dd126/craggle427/Rudder/IMG_1630.jpg) (http://s227.photobucket.com/user/craggle427/media/Rudder/IMG_1630.jpg.html)

(http://i227.photobucket.com/albums/dd126/craggle427/Rudder/IMG_1631.jpg) (http://s227.photobucket.com/user/craggle427/media/Rudder/IMG_1631.jpg.html)
Title: Re: Iran's Envoy tug build
Post by: craggle on July 06, 2013, 11:41:40 am
Probably a bit late this but I also noticed the mis-match between the metal rudder post and the plastic rudder cut out's.
After a while I concluded the metal rudder post had probably contracted when the white metal it is made from had cooled and was therefore too short so what I did is cut the rudder post between each hinge pin then using the rudder as a guide pieced it back together and pinned it to the bench.

This off course left gaps where it had been cut but an electrical soldering iron and some standard solder stuck it back together very easily. Once I'd soldered all 4 sides and filed it smooth again the strength was returned and it now fitted perfectly.

I suspect the mould for this part was made from a master that fitted the boat perfectly but white metal does shrink a fair amount when it cools so the finished parts end up being too small.

Craig.
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 06, 2013, 04:18:11 pm
Hi Craig,

Thanks for the input on the rudder assembly. It does seem a bit irregular to use a spacer under the rudder hatch cover to compensate but it does work. With this now under control, I will be permanently attaching the rudder frame and get this part out of the way.

BTW, you Envoy build looks great.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 08, 2013, 07:58:28 pm
I managed to get a bit done over the holiday. The Steering and Forward/Reverse Servos are installed but still need to permanently install the rudder. It will probably get done after painting the hull and priming the interior of the boat. I am waiting for various items to come in from England and Europe. It's too bad that very little for steam engines is available in the states so it's hurry up and wait. I would be putting the rear deck on but I think I can get the puke tank mounted between the forward spacer and the engine. I am waiting for delivery of a 90cc tank which should be perfect for the T2DR.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 17, 2013, 10:23:49 pm
I haven't stopped work on this project, just not much to report. I am still waiting parts for the steam plant, which is a very frustrating process since most of the stuff must be ordered outside the US, and not very time friendly. Since this is an admiralty tug, I have been working on the accessories such as ammo boxes and other support boxes. There is a lot of them including PE which I loathe doing.

Just to add to the frustration, I ordered couplings with an M5 thread on one end and a 4mm shaft on the other end. I waited out the long delay to get them only to find that the shaft end is 5mm instead of 4mm. Just adds one frustration to the heap.

I did receive the parts from Winfried and as usual, superb. I also now have a handful of Saito fittings. As soon as I find a condenser and appropriate fuel tank, I will be determining dimensions while in the hull and the put the system together on the bench and get it all working properly.

More to come as soon as I complete the collection of the components.

Cheers,

Iran
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 19, 2013, 02:23:36 am
Another while waiting story. To get more access to the steam plant, it was suggested that another hatch be provided. On the deck of the Envoy, there is very little space to add a hatch except for one place. I built a hatch under the Tow Hook. With this hatch I can place the fuel tank directly under this hatch. There is no rigging that is attached to the Tow Hook platform so this turns into a no brainer. Another step closer to installing the steam plant.

Pardon the poor pictures but the concept is clear. The first pic is from the top of the deck, the second is from the bottom, and the third is with the Tow Hook platform in place.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 27, 2013, 04:32:44 am
I'm still here. I am still waiting for some condensers from Europe to finalize the layout of the steam plant so I have been building most of the accessories. The pics show the rudder hatch, the main hatch with one of the tow bars, the pipeline, and the tow hook. The rear deck is in place along with the bulwarks braces. They need trimming and the cap rails need to be placed. This will happen once I get to the point where I can paint. I am holding off on the forward deck until the steam plant is completely designed. Getting to the boiler will require removing at least the wheelhouse and this has some complications to deal with.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 30, 2013, 01:55:57 am
The Aft end is nearly done. I need to install the railings, accent some of the parts with black paint. Thank goodness for the Salvage Pumps and the Merryweather valve. If not for those I could have just dipped the entire model in a vat of gray paint. Everything hatch is removable to get to the rudder and steam plant. Painting is not my best effort, in fact, I hate painting which is why I picked the Admiralty version. Chip rust and slap on gray.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: craggle on July 30, 2013, 11:28:10 am
That takes me back.....  :-)


Looking great and you are building at a pace, Took me months before I even thought about paint!


Keep up the good work and keep us posted on progress.


Craig.
Title: Re: Iran's Envoy tug build
Post by: cjcj121 on July 31, 2013, 01:12:12 am
Looking good , keep up the good work .
Title: Re: Iran's Envoy tug build
Post by: ir3 on July 31, 2013, 06:52:20 am
Thanks for all the kind words.  :-)) I have tried in every which way to stuff the 3 and 1/2" Macsteam boiler into the hull but it is a no go. <:( I will be substituting Miniature Steam Models 3" boiler which should be easier to shoe horn in. The Macsteam boiler will find a place in another model in the future. So for now, I will be detailing the Pilot House and the hatch holding the stack. Hopefully the new boiler will be expedited and be ready to install when I finish with the detail work.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 03, 2013, 08:56:15 pm
I started fitting the main deck and the main hatch. The hull required two spacers (not shown) to get the proper shape at the deck line. Still waiting for the 3" boiler but I can get a lot of work done relative to the main deck before fixing the deck permanently.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: TugCowboy on August 04, 2013, 09:27:30 am
Really enjoying seeing your build Iran, looking forward to seeing it progress.


Alex
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 05, 2013, 11:12:01 pm
Thank you. I managed to build up the Mizzen mast. Some of the parts are a bit below my normal working size. The turnbuckles for the fore stays are in and will be hand painted when the rigging is in. Also the two rear braces for the stack are in. The forward braces go through the deck and will be dealt with later.

Time to start the foremast. Still waiting news on the new boiler.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 07, 2013, 01:14:17 am
The fore mast is roughed in. The exact position of the mast still needs to be determined but I will cut out a ladder section that is slightly too long and trim to suit. The railings around the searchlight platform tested my nerves. All of the rigging points are installed and the spars will be turned and installed later tonight. I finally have some action on the 3" boiler so it should be here in a week or so. I can mate the two halves of the pilot house and there is a load of detailing to be done. I will be kept busy.

Oh, BTW, I added the shields to the Oerlikon guns so I guess this is no longer an Envoy. Of course, all of my models are after the first refitting from severe battle action so there can't be any complaints about inaccuracies or construction flaws.  :}

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 07, 2013, 11:19:00 pm
The foremast is basically finished. The ladder is a bit longer than needed and will be fitted once the mast is partnered with the pilot house. Now it is on to building up and detailing the pilot house itself. I was hoping to have the foredeck in place so I can correctly shape the base of the pilot house but it shouldn't be too difficult.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: escipion on August 08, 2013, 05:33:21 pm
Hello!!!
Really looking great, nice details   :-))

Best regards
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 12, 2013, 10:04:00 pm
The boiler finally arrived and I am submitting a first layout of the major components. All the items so far are accessible through removable hatches. I am also hoping that I can remove the wheelhouse without too much trouble. I think the only rigging issue is the fore mast fore stay. The aerials can all be installed with small hooks at the ends of the insulators and will be removable.

I put a lot of detail on the wheelhouse and did some painting. Painting is my worst suit so I will not elaborate too much with pictures.

Following is a picture of the initial steam plant layout. The fuel tank is accessible through the removable towing hook deck. The puke tank and the boiler are accessible through the main hatch. The only issue is going to be access to the burner. Hopefully this will be accomplished by removing the pilot house. I am also considering a water pump driven by the steam engine. This will require I find space for the water tank.

Until next time,

IR3

BTW: THIS LAYOUT WILL REQUIRE A 10" FUEL LINE FROM THE TANK TO THE BURNER. IT WILL BE INSULATED SO I HOPE THERE WILL NOT BE MUCH OF A LOSS.

Title: Re: Iran's Envoy tug build
Post by: ir3 on August 22, 2013, 07:23:14 pm
A lot of the cabin structure is complete. Once I am sure I can get the steam plant out the foredeck will be glued in and I can get on to the finishing stages of the build. I have parts of the steam plant mounted on the tray and am waiting for some copper tubing from the local hobby shop to start with the steam line and associated accessories.

More to follow soon.

IR3
Title: Re: Iran's Envoy tug build
Post by: 110samec on August 22, 2013, 11:28:59 pm
Looking good :) I've only ever built one kit which is the model slipway tsekoa (still under construction and I'm back on to building it now) and I must say they do seem to make lovely kits :)
Title: Re: Iran's Envoy tug build
Post by: craggle on August 23, 2013, 08:23:21 am
Looking great, Fantastic work.  :-))


Craig.
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 24, 2013, 01:25:38 am
Thanks for the very kind words.  :-) I have repositioned the gas tank. In the previous pictures the location of this particular tank meant that it was not accessible to remove. It is now positioned under the pilot house and is easily accessible. The boiler and the other components on the tray fits through the main hatch and now I can get the fore deck in place and start the beginning of the end.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 24, 2013, 05:18:17 pm
I need some help from the steam fitters following this build. The threads on the knurled nut do not match the Maccsteam fuel tank outlet fitting. The threads are wrong. I tried to remove the tip of the gas line and replace it with the nut from the Maccstecm fuel tank. My Benzomatic torch could not get the temperature up high enough to loosen the fitting at the end of the tube. I would hate to have to invest in expensive brazing equipment but if I must, then I must.

Any suggestions.

Thanks,

IR3
Title: Re: Iran's Envoy tug build
Post by: Jerry C on August 24, 2013, 05:56:24 pm
Hi Iran, I'm not sure that's the correct nipple for the Maccsteam valve. Mine is a plain brass tapered nipple with no "o" ring. If you have enough pipe length suggest you cut that one off and soft solder a tapered nipple on. No need for silver solder. If you really want to silver solder then use two house bricks at 90° to each other and make a hearth which will get more heat out of your torch. Removing the original nipple can be difficult and the silver solder used may not match the solder you have. It shouldn't be too difficult to convert the Maccsteam nut into a wing nut.
Jerry.
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 24, 2013, 07:57:04 pm
Thanks Jerry,

Good advice, and yes I can do some low temperature silver soldering so that is what I shall do.

Cheers,

Iran
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 26, 2013, 05:35:44 pm
Well, for every start there is a beginning. The pipe work has been started. My hats off to the steamfitters out there. :-)) I struggled with making up the intake manifold for the engine but I think that with every new connection, the job will go a bit smoother. I am applying too much silver solder and I found that once you get the joint up to temp and add the flux, just a touch gets enough to flow to make a tight, leak free joint. Experience, experience, experience.

The intake manifold had to be changed since Mainsteam regulator must go between the engine and the lubricator. Pic shows the new manifold. Next it will be a line to the regulator which will be located under the removable Tow Hook platform.

Until next time,

IR3

THAN GOODNESS FOR THE CLADDING THAT WILL GO ON THE STEAM LINES. :}
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 26, 2013, 08:49:45 pm
The hot steam line is in. Now, onto fitting a support for the line between the lubricator and the regulator. I think it will all be self supporting but a support would help. Also, the servo mount for the regulator need to be installed and then the fore deck can finally go on.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on August 30, 2013, 02:05:39 am
It's nice to have the fore deck in place. The hose reels are not yet glued down. They need to be wound with some thread to simulate the hoses. I have to get the anchors and anchor chain rigged and then the forward railing can be put in place. Starting to see light at the end of the tunnel.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: ir3 on September 06, 2013, 05:15:08 am
The Bridge and Pilot House are just about complete. There is a lot of detail and the railings are a nightmare >>:-( . I do not understand why kit manufacturers insist on hard brass wire for ships railings. The stuff is almost impossible to shape and finding mandrils the right size to form circular or arced sections and the spring back doesn't help. Well, for this model, the dry dock people did not do a great job repairing the battle damage but the tug is desperatly needed so it is going out as is. One lesson I learned is put the railings on at the earliest possible time. I waited till last. A big mistake.

All that is left for the bridge/pilot house are the wooden hand rails for the forward railings and a bit more rigging for the front mast.

Until next time,

IR3
Title: Re: Iran's Envoy tug build
Post by: craggle on October 09, 2013, 08:35:00 am
Haven't seen an update for a while, are you still progressing?


Craig.
Title: Re: Iran's Envoy tug build
Post by: ir3 on October 09, 2013, 03:31:19 pm
Hi Craig,

I have been on a 3 week holiday and just got back. I will be continuing the build and putting up some more posts very soon. I am down to finishing details such as anchor chains, life boat davit rigging and other minor items. Shouldn't be very long till I complete the setup of the steam plant and do some bench tuning. Hope to have the boat in the water in a month or so.

Thanks,

Iran