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Old 04-19-2002
davidk davidk is offline
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High Tech vs traditional-Comments?

Jeff, firstly please understand I am not the expert boatbuilder. The first boat is a 20ft half deck centreboard dayboat of carvel construction on frames and ribs. Yes everything was disassenmbed, dried out where necessary and planks which could be re-used were entirely coated. The planks were fastened and glued to the new ribs, frames etc and I believe these joints to be the main source of strength. The Epoxy between the plank edges was effectively caulking.

The new boat is a 42 ft yawl (technically she is a rebuild but only the lead and keelsom were retained). It started with the old boat, and the original plans which were found in a maritime museum. The old boat was checked for shape ref the plans and jacked back to her shape (some sag removed) - this was all measured with laser levellers. New frames were laminated up to fit the shape as old frames were removed one by one (for the order think like you were tightening down a cylinder head). Only when the old boat had new frames was the old planking removed and discarded. I have wondered if it wouldn''t have been easier to loft new frames from scratch since everything was being checked against the plans anyway (and the new boat is infact much closer to the plans than the old was anyway ... not just in hull shape). Whilst the carvel construction is edge to edge planking (i.e. no gaps designed-in unlike the first boat) of course the main strength must come from the plank/frame type bonds. These are all bolted as well as glued. Being a traditional shaped ''metre'' rating boat her wine glass shape is more white wine glass shaped than red wine glass!
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