Content-Type: text/plain; charset=ISO-8859-1
Content-Disposition: inline
X-Mailing-List: lancair.list@olsusa.com

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
>>
All,
        Error in my last post. "Spruce perp. to grain" should have read
"Spruce parallel to grain."
Sorry for the confusion. Scott, your responses are on the mark, but I think
you slipped some zeros
in your epoxy modulus. I get a range closer to 500,000 psi. That would make
your epoxy stress be
only 1800 psi so your example still holds true. Also, I hope noone ever
reinforces with purely
unidirectional carbon. It has great stiffness but lousy strength.

Guy Buchanan
Buchanan & Newcomer