Not about but homebuilt airplanes, but still inspired by one.... I am looking at little teardrop trailer and truck camper projects, some of which use largely foam construction. That got me thinking about the Sky Pup's wing spars with wood capstrips and foam webs. Can anyone with more engineering knowledge than me explain what might be the pros and cons of that sort of structure in order to say, cantilever a sleeping area over truck cab? To put it another way, if I take a pair of nice knot-free 8' 1x2 furring strips and bond them to a 8' x 10" x 1.5" foam web, how much could that "spar" support? The easiest thing to do, of course, would be to just build one and test it, but I am traveling for work so that's not an option at the moment. Thanks!
