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Author Topic: Help with Two Halves of a boat.  (Read 2635 times)

walktheplank

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Help with Two Halves of a boat.
« on: January 03, 2009, 09:06:15 pm »

Hi, as you may know I was looking for a set of plans for a canal boat.
I wanted to build it in 1/12th scale, with some help from some of you guys I now have a set of plans. They are copies of original drawings. The plan was drawn in two scales, one was
in ½ inch which was the length and beam, the cross section drawing is in ¾ scale. One question does anyone know why? 
So off I went to the printers and got them resized and now have them at 1/12  This is where I need some more help!  The boat now comes out at
71.6 inches long,  7. Inches wide and 7.10 inches high. As I build my boats in the loft and spray them out in the shed. I would like to build it in two halves and put the two halves together before sailing. I have seen some big ships put together like this for tug towing. My question what is the best way to do this? that will look good and not stand out like dogs bees.   ;)
Any help would be great. Thanks Sonic.
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Rex Hunt

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Re: Help with Two Halves of a boat.
« Reply #1 on: January 03, 2009, 10:30:11 pm »

Haver a look at Rex's Hermes on here

http://www.modelwarshipsuk.co.uk/

 ;)

Rex
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wideawake

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Re: Help with Two Halves of a boat.
« Reply #2 on: January 03, 2009, 11:02:52 pm »

Hi Sonic

I plan to do just that when I get round to my 1:12 model of nb President.  It's about 6th on the list of retirement boat projects ATM, though I do have a set of LHPs plans ready.

I intend to split the hull at the engine room front bulkhead (generally known as the back end bulkhead as it's at the back of the hold!)  I'll double that bulkhead up to gunwale height and arrange either to bolt the two sections together (simple) or make some sort of wedge shaped system to join the two halves.   I could draw this easier than explain it!   If i say "like a camera wedge plate" those in my sort of business will know what I mean but I don't suppose anyone else will  :((

HTH

Cheers

Guy
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Seaspray

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Re: Help with Two Halves of a boat.
« Reply #3 on: January 04, 2009, 12:23:36 pm »

If you have a look at Model Boats January 2009 page 19 photo 6 . There is a split hull there and photo 5 of the model joined. My KG5 @72 inches was split when I got her and no matter what I did I could always see the joint. A case of if you know its there you'll always see it. I can manage it about, so I sealed the end frames and tighten it up on it's bolts, filled the little joint with filler. Hair cracks do appear due to the flexing of the boat . If I were building a split hull I would build it as normally but have 2 identical frames at the point of split with a very thin spacer between them. So when the hull is cut between the 2 frames there is a small amount of materail available to sand back to the frames to try and get that perfect joint. There was 4 locating pins on the rear frame and corresponding holes on the other which always made sure the hull lined up on my KG5. 4 Bolts tighten the 2 hulls together.




Seaspray
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Shipmate60

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Re: Help with Two Halves of a boat.
« Reply #4 on: January 04, 2009, 12:31:38 pm »

As Seaspray has already said, you will always see the join unfortunately.
Over time the mechanism you choose will wear a little allowing the hull to flex.
All I can suggest is that whatever system you use make it replaceable or repairable so when it does wear you can bring back to original spec.

Bob
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