"Jdandy" wrote in message
om...
Heres a question that I don't seem to get a straight answer on. I want
to build a wooden aircraft. Instead of using sitka spruce, I'm
considering douglas fir. Since fir is stronger by approx. 25%, can the
limitations of the plane be pushed up by 25%? Is there a formula to go
by, or a place to contact? Given the right sized powerplant, could the
numbers be higher?
Jim

Nope. You can move stress, by making it stronger, and end up making it
weaker. What you can do, is use less wood, but the weight still will be
slightly heavier.
--
Jim in NC