I recently extracted the control system out of a severely damaged RC aircraft (a very simple kit deal). It's got two servos, and a pretty good motor, which works out perfectly for me! I want to build a new aircraft from scratch using the recovered control system. For the fuselage I'm thinking of using a simple truss type frame. Simple enough, but I'm getting stuck on what material to use. Balsa wood seems reasonable because of it's low weight. I can see it being fine for the wing ribs, but I doubt it'd work as well for the fuselage, wing spar and other flight surfaces. Does anyone know of any materials that are simple to acquire and that will handle the load? The battery is the heaviest part at about 500g, along with the motor.