"Lou" wrote in message
oups.com...
Well,,,,,,,,,,, at this point I'll have to say half and half.
The plans call for plywood over the ribs of the wings, structural.
the other parts are to cover the fuselage but the strutural is taken
care of on the inside.
Lou

I did it with different fiberglass years ago. I made lay ups with different
types and amounts of glass cloth. I cut my samples in 1" wide coupons and
took them to a testing company simply chosen from the phone book. Since I
didn't require any written reports with the test results, they did it
extremely cheap. I think the pulled 8 coupons for $20, in about 1985.
Roughly $40 today.