The only rules we had for combat was a limit of a .25 engine. That allowed a lot of freehand designing. Some worked some didn't. The best combo was a Norvel .25 with an APC 8X4 prop and a 24 inch span flying wing. Sheeted foam wings 3 servos goes like a bat out of hell and does loops small enough you can cut your own streamer if not careful. The old one all beat up still fly's no problem. All the red is supposed to be blood from the many it has mid aired and turned into junk. Found out I got more cuts aiming for the other plane instead of a streamer.