Re: REFLECTOR: Carbon fiber vs. E-glass

[David Doshay <ddoshay@cisco.com>]

> Kevlar?

Kevlar is very strong in tension and very weak in compression. It is
great for impact loads. From what Alan wrote:

	90% of all structural problems are compression

I'd be very careful about using Kevlar unless you are very sure that
it is to be for added strength in tension only. So, that rules out
stuff like spars, where one side is in tension and the other in
compression, and which side is compression flips when the G's go 
the other way.

Kevlar is also good for scraping, and is often put along canoe keels
for that reason (scraping on rocks and river banks). Might be great
along the lower edges of the winglets or the belly of a retract.


In my opinion, probably not worth the trouble.

David