Costs of composites

"Pilot Guy" wrote in message
...
I went to the local chapter. Most of the guys there built an ultralight in
the 60's, and that was it....

I am not saying anything bad about that chapter, or the EAA, but I need a
little more guidance. I am looking at cost verses weight & stength. Any
words of advice besides "Join EAA"?

I still think that a chapter, or more than one, is a good starting point for
other people's experience. As you point out, you may finda fairly hide
bound group who are quite content with the past... However, they are
the most easily accessible. EAA headquarters is also a resource for
the members, and they also sell books on composite fabrication; as well
as other methods.

Additional sources that *may* be available could include AE/IA's, some
of the guys in your nearby SCCA (Sports Car Club of America) who
may have some experience with composites in racing cars, and boat
builders (although they may have a nearly total disregard for weight).

I have heard that carbor fiber is/was popular for outer bodies of race
cars; but that it shatters on impact. Apparently very strong and very
stiff, but low energy absorption.

Assuming that you are already very comfortable with the design
requirements, including the attachment of hard points and the transfer of
loads from the wings, tail, and engine to the fuselage; the manufactures
and dealers of the fiber, cloth, and resin will be the best source of prices
as well as any special procedures specific to their products.

By the way, if you are really comfortable with the design requirements
of these highly directional materials and with their attachment to any
necessary mounting hardware or dissimilar materials, evenbefore you
know the weight, cost, and other specifics; then you are probably either
much smarter or much more foolish than the rest of us!