A discussion about WWII aircraft came up over drinks tonight and the topic of conservation of resources was brought up. The question was put to me whether anyone had tried a wooden spar and ribs configuration with metal over it. I couldn't recall any such design but do recall hearing of the reverse (wood over a metal frame) although the specifics escape me. Anyone have anything further to add? I told my friends that I'd ask my homebuilder friends because I figured if anyone knew about oddball designs, it would be you guys.