RAH-66 ComancheRAH 66 Comanche helicopter model. The RAH 66 Comanche is a state of the art twin engine, two seater (tandem) light attack armed reconnaissance helicopter developed for the U. S. Army by a joint venture of Boeing Helicopters and Sikorsky Aircraft. It boasts a five bladed bearingless main rotor, shrouded tail rotor, low radar cross section composite fuselage with retractable weapons pylon, fly by wire flight control system, and fully integrated cockpit.