On Aug 17, 6:49*pm, "Eisboch" wrote:
wrote in message

...

On Aug 17, 6:33 pm, wrote:

And you twisted the question, a typical trait of yours. First it was
"what stitch and tape..." now it's "what ocean going.. " you are
toying around while folks are trying to get serious info, but you
obliviously don't know the difference between stitch and tape, and
composite, and skin on frame.. Three different construction methods,
three sets of engineering tricks to provide structural integerity,
although there are also several ways to hybred two or three of the
techniques, which I have done for several dozen boats, How many Epoxy
resin (not polyester) Occoume laminate, and Bi-axle boats have you
built, any size will do, and please provide either pictures, or just
spin it another way. * I just can't stand to see someone passing along
so much wrong information, but I will try again to ignore you...
later..

I am a complete dummy about working with fiberglass and resins, mainly
because my brief employment at Boston Whaler exposed my severe allergic
reaction to the stuff.

But, a few years ago, in Florida, I was talking to a guy who was involved in
litigation with his new boat manufacturer. * Seems the bulkheads and other
glassed-in components were separating from the hull structure, and the boat
was basically falling apart.
This was a large boat (55+ footer).

I learned later that the hull had been built, but then sat around for some
long period of time before completing the manufacture of the rest of the
boat. *The problems were apparently due to the fact that once fully cured,
the resins used to install the bulkheads, etc. did not properly bond to the
hull. * I was told that the process has to be done in a timely manner to
ensure proper bonding.

I don't know, but it made sense, because other boat from the same
manufacturer did not exhibit these problems.

Eisboch

I would have to guess either the surfaces were not prepared properly
as you noted, or they used Polyester Resin as an anhesive as well as
for the laminations.. Polyester is for laminating, Epoxy is an
Adhesive.. They can, and in many cases can be used in conjunction, but
proper care must be taken as you must rely on a mechanical bond as you
can not mix the two and create a chemical bond. I should also note
that there are still many huge manufacturers out there that will
insist that these resins are waterproof and we have had that
discussion before but for this conv, I stipulate that they are...
"until the seal is disrupted", then they just make great barriers to
hold moisture in, which is a great way to delaminate, uh, laminates
and rot wood. Over time folks are learning to use Epoxy as an
adhesive, and to never try to "seal" frame components, paint is much
better at letting the wood breathe.. HTH..