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From: Barry Brazier (no email)
Date: Thu Jul 03 2003 - 20:22:33 EDT
Many of the modern racing boats are made of Kevlar and Carbon fibre set in epoxy. Some of these are now out of date for IMS rating rules and are available at reasonable prices for conversion to cruisers.
I saw some very good conversions of the older IOR racers like one and two toners.
Does any one know of a successful "composite" IMS conversion?
Barry
----- Original Message -----
From: Bryan Genez
To:
Sent: Friday, July 04, 2003 6:06 AM
Subject: Re: [world-cruising] Coring and delamination
wrote:
>> Airex also has a wonderful
>> characteristic of changing shape under heat; you can literally see
>> waves
>> develop in an Airex-cored boat that's in the summer sun.
>
> Assume you are talking about decks, not hulls.
Actually, I'm talking about hulls...but to be honest, these are
lighter-weight performance hulls, where the glass laminate is thinner than
the Airex core. These hulls really will deform in the summer sun.
>
>> Not necessarily. Fiberglass is notoriously low in abrasion
>> resistance.
>
> Absolutely true, especially if it is a polyester laminate using mat and
> woven roving.
>
> OTOH, epoxy and knitted glass laminates offer better abrasion resistance.
> (You would be amazed how fast it can render a 16 grit sanding disk
> useless<G>)
Almost everyone, when discussing fiberglass boat construction, is talking
about mat, woven roving, and polyester resins. Other than the Hodgett Boat
Works, is anyone constructing with epoxy and knitted glass? Are any of
these boats available to John Q. Public?
If not, we should probably assume that "fiberglass" is synonymous with mat,
woven roving, and polyester, because that's all that's out there.
BTW, in the "bullet proof" category...a friend who owns a Valiant 50 had a
naval architect run strength tests on his hull. He determined that he could
hit an immovable object (e.g., the infamous "semi-submerged container") at
hull speed without compromising the hull's integrity. That evaluation
eliminated my friend's interest in watertight compartmentation. My guess is
that Lew's boat will be a few notches stronger....
--
Best,
Bryan (KB3HMZ)
"Capella" Valiant 40 #158
Annapolis, MD
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