We've got some Fly Baby builders who are considering building the Hevle
Classic tandem Fly Baby. We're trying to work out what would be a good
thickness for the spruce spar. My thought was that comparing it to that of
a production plane would be a good start.

So, can anyone tell me the thickness, height, and length of the wooden
spars for the J-3 and the Aeronca Champ?

Ron Wanttaja
www.BowersFlyBaby.com