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Subject: Re: Trapper 501 Bilge Keel for sale


Author:
Brian Henry
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Date Posted: 16/04/04 21:38:25
In reply to: nick 's message, "Re: Trapper 501 Bilge Keel for sale" on 16/04/04 19:49:23

Nick,

Yes, of course there are many boatbuilders' products that are keeping the boatyards busy with osmosis projects, it's far from being only a Trapper problem.

We did once discuss the subject when I had my Trapper pages on my Worldcom home site with some remarks about my osmosis treatment - you were surprised about that and commented that you believed that Trapper yachts were generally free of the problem.

An informative source on osmosis is David Pascoe, a marine surveyor in Florida - he has some persuasive arguments about osmosis blisters and causes at:
http://www.yachtsurvey.com/moreonblisters.html.htm
where he emphatically states:
"The fact is that boat bottoms blister because builders knowingly make the decision to the cheapest possible resins to reduce their costs. Build a boat with better quality resins, resins that are not water permeable, and they will not blister, barring other major production faults. This is the reason why some boats blister while others do not."

He goes on to say that lay-up techniques are also a factor but I think that Trapper hulls were properly constructed with correct wetting out of the woven rovings, from my own work on Beachcomber.

I find it difficult to accept your surveyor's comment that ALL fibreglass boats will get osmosis in time - Pascoe makes the claim that Hinkley yachts do not, at any age. I believe that when a yacht is built and protected with isophtalic/vinylester resins there should be no osmosis blisters even when, as my Trapper is, kept afloat the entire year.

It makes me nostalgic for my wooden boats, at least I could set a new plank in myself without incurring horrendous yard costs like osmosis treatment!

Best,

Brian.

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Re: Trapper 501 Bilge Keel for saleNick18/04/04 13:57:40


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