Thanks. The prop optimizer is interesting too. My other interest is
hovercraft. Again, not an airplane, but it does have airplane components
.... and I guess it does fly ... even if it is only inches above the surface.
:-)
http://groups.msn.com/UH13p

I have emailed them and asked for the appropriateness of their programs for
my non-standard applications.

"Fitzair4" wrote in message
...
Bates Engineering has a DOS computer program for designing a wing spar.

www.aeroOptimizer.com

I have met him and listen to his forums at Oshkosh many times.

Larry Fitzgerald