Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: Spiney on July 27, 2020, 09:52:39 am

Title: Spiney's Grand Banks
Post by: Spiney on July 27, 2020, 09:52:39 am
Having shelved (for the time being) the Amati Riva kit due to excessive weight issues I thought I'd have a crack at the Grand Banks.  I've been admiring this kit for some time and spurred on by Stan's progress on his I took the plunge and ordered the kit from Cornwall Model Boats.  This time around I'm prepared for the challenge of an overweight kit and have made a start by weighing and test floating the hull to get an idea of the scale of the diet required.  I've decided on a target all up weight of 3.5kgs and the hull as supplied out of the box already accounts for 1.727Kgs of that.  Decision made to attack the pristine hull it now looks like this and still weighs 1.65Kgs.  The enforced wait for delivery of the motors, mounts and stern tubes will give me time to mull over whether to leave it as is or try to find ways to remove more material before continuing. 

Thanks to Stan by the way for all your help and advice before I've even started.....
Title: Re: Spiney's Grand Banks
Post by: Martin [Admin] on July 27, 2020, 11:15:22 am
 
Slots  cut  freehand?   :o
Title: Re: Spiney's Grand Banks
Post by: Spiney on July 27, 2020, 12:07:35 pm
Pretty much Martin, Ran the outside of a pencil down the gunwales and my finger along the inside as a rough guide and the winged it, as is my way!
Title: Re: Spiney's Grand Banks
Post by: Taranis on July 27, 2020, 06:26:45 pm
 8) Nicely done


   I see lots of further possible holes without it sinking  {-)   


Watching  :-))
Title: Re: Spiney's Grand Banks
Post by: Stan on July 27, 2020, 07:36:03 pm
Not holes in the hull you need to worry about. I need to do more work on my hull  at some time.


Stan. :-)) :-)) :-)) :-)) :-)) :-))
Title: Re: Spiney's Grand Banks
Post by: Spiney on July 28, 2020, 12:45:25 pm
Still waiting for the shafts and tubes to arrive so tried an experiment to see what weight reduction is possible by grinding off some of the interior gel.  Just this amount removed around 10 grams so its probably worth the effort to continue once the Dremel has recovered and recharged.


Down to 1.64Kgs........
Title: Re: Spiney's Grand Banks
Post by: Spiney on July 28, 2020, 02:32:54 pm
1.61Kgs - quite encouraged....
Title: Re: Spiney's Grand Banks
Post by: Stan on July 28, 2020, 04:03:59 pm
I can see daylight take it steady. {-) {-) {-) {-) {-) {-) {-) {-) {-) {-)


Stan
Title: Re: Spiney's Grand Banks
Post by: Spiney on July 30, 2020, 12:39:29 pm
1.57Kgs.  May stop here and just give the inside a coat of white emulsion to hide the carnage.  Im still waiting for the props and shafts (beginning to think that they are lost in post) so have plenty of time to mull it over....
Title: Re: Spiney's Grand Banks
Post by: tsenecal on July 30, 2020, 03:56:14 pm
i like what you are doing here, but have you considered what you will have to do to the cabin to keep this thing from capsizing when it is all together?
Title: Re: Spiney's Grand Banks
Post by: Spiney on July 30, 2020, 04:07:09 pm
I have (kinda) but it's all guesswork at this stage really.  The way I see it is even at this weight it's still a massive chunk of glass and plastic and there's loads of scope for weight saving above the gunnels, much more so than in the hull so I don't expect to see an issue.  Even if it turned out that a bit of weight is desirable it will be a darn site easier to add it than it has been to take it away!


I'm now at the stage of diminishing returns anyway so I've just given the insides a coat of white primer and will be calling it a day until the stern tubes, shafts and props arrive (if they ever do).
Title: Re: Spiney's Grand Banks
Post by: Spiney on July 31, 2020, 09:40:50 am
Primer now dry the final hull weight is just under 1.55Kg.  It looks a little battle scarred but is still strong enough to ram a battleship and come off best!


Guess this post will now go quiet until the Post Office find my props and shafts or the nice guys at Modelboatbits ship me some replacements...
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 01, 2020, 11:28:17 am
Stern tubes and props arrived so started on the rudders, the hole for which is marked on the hull by a small indentation.  Unfortunately at least one was in the wrong place, something I realised after I'd drilled the hole.  One hole filled with epoxy and redrilled now at least I have two holes the same distance from the centreline.
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 04, 2020, 03:09:05 pm
Although I've been quiet over the past few days I have been busy and now have the motors, shafts, tubes, props and rudders in place.  There is also an as yet unfixed electrics board with the ESC's and receiver in place and the basic wiring all done.  The weight of the hull has now shot up to 2.6Kgs but this includes a NiCad battery which may or may not get replaced with a LiPo.  Pictures to follow soon....


In the meantime and whilst waiting for various bits n bobs to dry I've had a crack at recreating the little RIB in balsa rather than attempting to lighten the one supplied.  It's been a fiddly old job but I think I now have the makings of a passable replacement although it still needs quite a bit of tidying up (not to mention a hull and floor).  The bit benefit, the supplied RIB in grey just over 100 grams, mine 10 grams...
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 09, 2020, 12:05:06 pm
Finally got to a point that I'm reasonably happy with.  All the basic electrics are now in place and working as are props and rudders etc.  I had a real problem with vibration which is the reason for the large fin between the prop shaft and hull.  Unfortunately that means the underside can hardly be considered scale but at least it should run smoothly.  There's a large unused area on the electrics shelf which will be used to run various lights but I'm not sure yet whether they will be remotely controlled like Stan's or a simple bank of switches.  I should probably fit at least a main fuse but not too sure whether it's better to be able to retrieve a model that looks a bit smokey on the water or have a fuse blow to protect everything but leave it stranded on the water?  Advice welcome......
Title: Re: Spiney's Grand Banks
Post by: Stan on August 09, 2020, 01:53:40 pm
Hi spinney if you check out my electrical installation you will see both motors are fitted with separate fuses. These are from Action model electronics in terms of vibration my shafts are exposed when they leave the hull and are supported with P frames which go into the hull. In terms of lights that will be your choice but I do like to use my radio to do the job. Looking good up to press.




Stan. :-)) :-)) :-))
Title: Re: Spiney's Grand Banks
Post by: Stan on August 09, 2020, 08:42:44 pm
HI Spinney picture showing the P frames and exposed shafts fitted in my model no problems with vibration.


Stan. :-)) :-)) :-)) :-)) :-)) :-))
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 10, 2020, 10:41:40 am
Thanks Stan, I did see how you'd done your shafts but as I'd already ordered full length stern tubes I went with what I had.  I will take your advice on fuses though, except mine will end up between the battery and ESC rather than ESC and motor.  Love your mast wiring by the way, very tidy and the boat will look a treat with the deck lights on under the spreaders.
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 13, 2020, 02:14:53 pm
Today I've made a start on the topsides.  In keeping with weight savings in the hull I'm determined to keep the rest as light as practicably possible so the ply and MDF are largely being replaced by balsa although there are at least two very slender frames where I'll keep the original parts for strength.
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 17, 2020, 12:11:47 pm
So the topsides are beginning to take shape.  Using balsa by comparison with the beautifully laser cut parts supplied in the kit feels a little like making the kit from sponge but even though it definitely looks a lot rough round the edges all the balsa is under the skin and provides a framework for what comes next.  On the plus side it is having a major effect on weight.  Todays weigh in (as pictured below) comes in at 157g even including a number of parts used from the kit where strength seems more important than low weight.  The weight of the discarded parts so far (picture 4 below) is 328g.
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 21, 2020, 02:33:39 pm
Apologies!  This seems to be a fun stage where the boat starts to take shape and I've been beavering away ignoring my Mayhem duties.  Here are a few pics of where I am now.  The paint is Humbrol acrylic matt white spray and I do like the look of it although it'll be finished in semi gloss silk.  Looking for something more affordable though as the Humbrol is nearly 10 quid a can and lasts no time at all.


Similarly to Stan I am installing instrument back lights and there are a couple of LED's installed under the flybridge panel housing to spread the light a little but running a half power so as not to look silly!


Still pleased I replaced much of the ply and MDF with balsa although I'm a having to be very careful with the structure and have already had a couple of accidents, thank god for superglue and filler!
Title: Re: Spiney's Grand Banks
Post by: Stan on August 21, 2020, 03:25:52 pm

Looking good I think you may have yours finished before mine.


Stan.







Title: Re: Spiney's Grand Banks
Post by: Spiney on August 22, 2020, 01:35:00 pm
Thanks Stan.  Next stage will be to illuminate the main cabin and I canít think of a better way of doing so than your layout.  Out to the garage in a moment to play with some new LEDís but I apologise in advance if I just end up copying your design.
Title: Re: Spiney's Grand Banks
Post by: Stan on August 22, 2020, 05:21:26 pm
HI Spinney have you glued down the fly bridge? If you have this will make fitting a sub roof to accommodate the lighting difficult.


Stan.
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 22, 2020, 05:37:27 pm
No itís just placed for the picture.  I have a draft cabin roof with 6 ledís installed and want to finish with a clear or frosted dome, about the size and shape of a jelly tot, any ideas?


Postie brought me a bag of tiny magnets today and I am intending (but not yet worked out how) to fix the fly bridge and one cabin side using these.


Cheers
Spiney
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 23, 2020, 01:12:03 pm
Nav lights made and ready to go.  Managed to make 2 port assemblies, TWICE.  >>:-(
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 25, 2020, 02:54:32 pm
A couple of pictures of progress today with the electrics.  Everything is now installed in the flybridge and cabin overhead lights.  Some of the wiring is a bit of a rats nest right now but the effect with everything on is great.  The next stage will be to install magnets between the cabin and flybridge.  Sadly the pictures don't quite do justice to the effect.  The instrument panel lights are just about right although I have to get rid of the light seepage around the edges but the gauges look very convincing, it's a shame that highlights in the photo are completely blown out.  Once the electrics are properly installed and everything can be turned on without lashing everything together I'll get some better pictures.  All in all I confess I'm quite chuffed.   :-))
Title: Re: Spiney's Grand Banks
Post by: Stan on August 25, 2020, 03:18:57 pm
Hi how many light are in the roof area any pictures? My top deck panel used one 2mm LED. Are using electronic switchers to turn on the lights?


Stan

Title: Re: Spiney's Grand Banks
Post by: Spiney on August 25, 2020, 03:44:49 pm
Hi Stan


There are 6 lights, arranged just as yours.  I did take your advice and ordered some led lenses but theyíre not all that convincing so still on the lookout for my frosted jelly tot!


I will be using a receiver driven switch but different to yours, same principle but with eight switches and still waiting for it to arrive.  Once Iíve tidied everything up and installed the switch Iíll take some more photos.
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 27, 2020, 02:20:44 pm
I've now installed magnets between the flybridge and cabin and arranged the wiring to align with notches in the cross members.  All the wiring exits via the small locker immediately forward of the flybridge steps so that once the flybridge is in place no wiring can be seen.


I'm using pre-formed LED / resistor combinations which means that it is often not possible to cut wires to the ideal length so I've ended up with quite a few stragglers, hence the masking tape making sure that everything lies flat.


Next stage, once the 8 port receiver switch arrives will be install it, and all the wiring underneath the cabin floor.  That'll mean that the only wires I will need between the hull and the topsides will be one radio receiver cable for the 8 port switch and one pair of wires for power.


The last picture just shows the 6 cabin lights shining through 3mm holes and still awaiting a flash of inspiration for my frosted jelly tot ceiling shade.
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 27, 2020, 02:30:50 pm
Oh, and I meant to add that the all up weight for the topsides as shown above is 360 grams  :-))
Title: Re: Spiney's Grand Banks
Post by: Stan on August 27, 2020, 03:53:11 pm
HI Spinney looking good you must have had a good teacher.


Stan. :-)) :-)) :-)) :-)) :-)) :-)) :-))
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 28, 2020, 03:08:42 pm
Thanks Stan although there's no teacher as with most things I just make it up as a go along!


Today I've just been replacing the failed plastic Amati tiller arms with nice shiny ones made from 3mm aluminium.


Have you managed to repair the damage to yours yet?
Title: Re: Spiney's Grand Banks
Post by: Stan on August 28, 2020, 06:51:05 pm
Simple answer no to busy with very large paint brushes. ( decorating)


Stan. <:( <:( <:( <:( <:( <:( <:( <:(  but there is some light at the end of the tunnel. :-)) :-)) :-)) :-)) :-))
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 30, 2020, 04:21:40 pm
This is the interior steering position with LED installed for the instrument lights.  Trying to be quite fastidious with the way this is built because once installed it'll be totally inaccessible.  The LED I'm using is red and seems to have a pronounced beam effect compared to the white ones so will need diffusing to spread the light over the whole instrument panel.
Title: Re: Spiney's Grand Banks
Post by: Stan on August 30, 2020, 04:57:08 pm
HI Spinney the answer to gaining access to this or any other items in cabin area is to glue one side down and make the other side removable. All of my furniture is held in place with servo screws and all the wiring can be reached with no problems. Most of this can be seen in my build log


Stan. {:-{ {:-{ {:-{ {:-{ {:-{ {:-{ {:-{ {:-{ make one side removable problem sorted. :-)) :-)) :-)) :-)) :-)) :-))
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 30, 2020, 05:07:05 pm
Thanks for the advice Stan, I was aware that your model has a removable side held in place with magnets but having mulled things over I think mine will have fixed sides.  The reason is that Iíve used a lot of balsa in my build to keep weight to a minimum and I suspect Iíll need the sides to be glued down to build a little integrity back into the structure.  Of course that might change when I get to that stage but in the meantime Iím building as if I wonít have access later on.
Title: Re: Spiney's Grand Banks
Post by: Mark T on August 30, 2020, 05:20:57 pm
Spiney what a lovely build and I think your wiring is extremely neat too.  You have made this a very thoughtful build - just lovely  :-))
Title: Re: Spiney's Grand Banks
Post by: Spiney on August 30, 2020, 05:36:43 pm
Thank you Mark.  Just been looking at your saw bench -JEALOUS-
Title: Re: Spiney's Grand Banks
Post by: Mark T on August 30, 2020, 06:43:41 pm
Ha ha hi mate - it took me many years to get my table saw.  Without a doubt the best tool that I have ever owned and I couldn't do without it now  :-))   Keep your updates coming as your build is inspiring.  By the way what not make your own light diffusers?  It seems to me that you have the skills so crack on!
Title: Re: Spiney's Grand Banks
Post by: Spiney on September 01, 2020, 12:37:50 pm
Today I've added two more red LED's for the instrument backlighting.   The original didn't have quite enough punch on its own and it was masked from the lower instruments by the woodwork.  The two new ones were therefore installed to project towards the instruments at 90 degrees.   The effect is finally what I was hoping for.
Title: Re: Spiney's Grand Banks
Post by: Spiney on September 09, 2020, 02:25:36 pm
I've spent the last few days putting together the various pieces of furniture for the cabin.  As these are all small pieces I've not worried too much about weight and gone with the kit supplied wood.  Once at the little sofa however that changed.  The seating piece along with lots of similar parts will be junked and remade.  Amati really do have absolutely no regard whatsoever for weight in this kit.  The sofa in the picture below weighs 100 grams.  Remade in balsa 20 grams.  I do have turn furniture maker and cover the sofa next but Amazon just delivered 1m of cream PVC.  I'll show how this turns out in another post unless it's complete rubbish in which case I'll just delete all this!
Title: Re: Spiney's Grand Banks
Post by: Stan on September 09, 2020, 03:37:49 pm
I used this item but i removed a load of resin from underneath. Are you using the dark wood supplied in the kit?


Stan.
Title: Re: Spiney's Grand Banks
Post by: Spiney on September 09, 2020, 04:57:42 pm
I am Stan, I know the mahogany ain't exactly kosher but it is fine grained so it scales well and looks quite nice if not quite right!
Title: Re: Spiney's Grand Banks
Post by: Spiney on September 12, 2020, 03:09:56 pm
Today a few pictures to catch up to where I am.  I've now installed the steering position with the red backlit instruments.  Apart from the instrument / steering position all the rest of the furniture is just placed for the benefit of the pictures.  There's a bit of light leakage just below the instrument that needs sorting but pretty pleased otherwise.
Title: Re: Spiney's Grand Banks
Post by: Spiney on September 12, 2020, 03:15:39 pm
The sofa is now complete and again, pretty pleased apart from the upholstery right at the bottom where the two arms of the sofa meet.  There was a long piece of PVC designed to wrap under the seat and be pulled tight to pull the material into the 'L' unfortunately it just ripped off.  I don't have the patience to go back and start over so I'm hoping to graft a small piece of PVC into the joint to disguise it.
Title: Re: Spiney's Grand Banks
Post by: Spiney on September 12, 2020, 03:19:18 pm
Next are the interior cabin lights, the covers for which I finally found on a jewellery site on Ebay.  There are the "Frosted Jelly Tots" I've been referring to which I hoped would resemble ceiling shades.  With a bit of gold paint around the rim they are pretty much what I was hoping for.
Title: Re: Spiney's Grand Banks
Post by: Spiney on September 12, 2020, 03:27:58 pm
Last post today shows the electrics for the various LED's finally tidied up.  I had originally used an 8 way switch to turn everything off and on (I won't reveal the source) which did have the advantage of being incredibly small and light (so small that I had to buy a new set of micro screwdrivers to connect the wiring) and after many confusing attempts to get it all working I found out that this strange device is only capable of switching the return (negative) side of the load.  As I had designed the entire boat wiring to have a common return it was never going to work and so it joins the pile of scrapped Amati pieces.


It's now been replaced with an Action Electronics switch which installed with no problems whatsoever and is what Stan told me to use in the first place.  Live and learn, should have listened. :-))
Title: Re: Spiney's Grand Banks
Post by: Mark T on September 12, 2020, 04:02:25 pm
Very nice tidy work and the lights look great - I wouldn't worry too much about the light leakage around the instruments I think its nice as it is
Title: Re: Spiney's Grand Banks
Post by: Spiney on October 03, 2020, 04:01:42 pm
Apologies for the absence but there's two things that have been bugging me, the sofa which, despite what I said above, is going to be re-made.  the carcass is complete and I'm awaiting some PVC which should be a little more stretchy that what I used before so should, I hope, mould itself around the curves.


The second thing is the electrics.  Everythingl works OK but the whole design kinda grew organically with bits added on here and there as the layout evolved.  Today I bit the bullet and ripped everything from the hull and will start again.  This time I think I've got all the hardware I need so should be able to make a better fist of the layout and wiring.  Just made a start by mounting the switch gear onto an aluminium plate which will be used for main on/off plus the on/off for each esc.
Title: Re: Spiney's Grand Banks
Post by: Stan on October 03, 2020, 08:42:51 pm
Hi Spinney I sealed my top instrument panel by simply masking off the panel leaving the edges clear.Then I mixed some epoxy and applied it with a cocktail stick to the edge and smoothed it out with a very small screwdriver dipped in water.Finally paint to match your model.
 
Glad you decided to use Action switches for me they are the best.


Stan



Stan.
Title: Re: Spiney's Grand Banks
Post by: Spiney on October 14, 2020, 12:54:11 pm
I've felt like I've been moving backwards lately as I have returned to the parts I've not been happy with and started over.  Finally I'm at the stage where I can move forward again.


First picture, the Mk 2 electrics board.  I'm still using the Action Electronics 4 way switch installed under the cabin roof but have also added the two remote controlled relays to channels 5 & 6.  The nav lights and the cabin lights can therefore be switched on and off with two spare transmitter switches.  Everything else is switched with the 4 way.


Second picture, the Mk 3 sofa.  Slight flaw where the PVC isn't quite bonded to the backrest but there definitely won't be a Mk 4
Title: Re: Spiney's Grand Banks
Post by: Spiney on October 26, 2020, 10:47:20 am
Picture showing the underside of the topsides.  The 15way connector fits into the socket in the electrics panel and carries all signals and power to the Action switch and various LED's.
Title: Re: Spiney's Grand Banks
Post by: Stan on October 26, 2020, 04:25:27 pm
That set up looks very similar I wonder were that come from?


Stan. {-) {-) {-) {-) {-) {-) {-) {-) {-)
Title: Re: Spiney's Grand Banks
Post by: Spiney on October 26, 2020, 05:48:46 pm
He He, not too many ways to crack this egg Stan 🤓
Title: Re: Spiney's Grand Banks
Post by: Spiney on October 29, 2020, 12:47:03 pm
A few pictures of the interior before the final touches (charts and magazines spread about) and the cabin sides and windscreen go on.  Still haven't decided whether these will be permanently fixed or held on magnetically but permanent for the extra strength is my guess right now.