Re: [Paddlewise] Durability

From: 735769 <735769_at_ican.net>
Date: Thu, 6 Jan 2000 08:36:55 -0500
Bob wrote;


> I totally agree that anecdotal evidence is just that.
>
> Tests could probably be (have been????) done with sample pieces of
fabrics.
> Much more uniform than busting up different boats and cheaper too.
>

(Large Snip)

An extensive body of test data exists for a wide range of laminates (done by
fabric and resin manufacturers and others) but, while it provides some
comparative measure of the various strengths it doesn't answer the basic
questions, "How strong is strong enough" and "what are the relative
importance of  weight, impact resistance, stiffness .etc. etc".

I love the numbers but they don't tell me the difference between "just
right", "under built", and "overbuilt" not to mention the difficulty in
understanding them.

Try comparing such disparate materials as Royalex, FRP, Polycarbonate and
Polyethylene and the numbers don't make a lot of sense without expected
loads.

A tough problem where publication could cause more confusion than good.

Cheers,

John Winters
Redwing Designs
Web site address, http://home.ican.net/~735769



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Received on Thu Jan 06 2000 - 10:56:08 PST

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