RE: Foam combat plane
You can do a search for the FUNK on the forums. Made form 3/4" pink insulation foam. If you want something with a real airfoil I've built a plane with foam core wings and a coro fuse. Cheap and light. I haven't maidened it yet, but I plan to next weekend (travelling a lot lately). I'm planning on offering kits with CNC cut foam core wings for $45 bucks. Let me know if your intersted. Look a few posts back in RC Combat for twin tail SSC design. Chris