Bell Helicopter Textron Boeing V-22 Osprey VTOL STOL tiltroter aircraft. Flown by the US Marine Corps. The Department of Defense began the V-22 program in 1981. Full-scale development of the V-22 tilt-rotor
Bell Flight - The Bell X-22 V/STOL X-plane may look like something from an old sci-fi movie, but it became a reality in 1960s. Only two were created, but the Bell X-22