The Vertol VZ-2 was a tilt-wing VTOL (vertical take-off and landing) plane. This aircraft first flew on 13 August 1957 and was retired in 1965 in Virginia. The wings are designed to tilt to allow the rotors to lift the aircraft the way they would on a helicopter. Once airborne, the wings tilt back to face forward, as seen here.
#22 Is this one the only one still under testing?