The Aerophysics Development Corporation, a Curtiss-Wright subsidiary, designed a tandem two-seat "Aerial Platform" for a US Army Transport & Research Command "Flying Jeep" design competition. To prove the design concept, the US Army ordered 2 prototypes of a smaller single-seat demonstrator, the VZ-7, which were delivered to the US Army in mid-1958. The VZ-7 had a fuselage with the pilot's seat, fuel tanks and flight controls. On both sides of the fuselage the four propeller/rotors were attached, unshrouded (the aircraft did originally have shrouds, but these were later removed). The VZ-7 was controlled by changing the thrust of each propeller and was maneuverable and easy to fly.