Kit #AA2002. 1/72 scale. Highly-detailed resin kit with decals. During early 1950s, Bell Aircraft began studying conventional ducted propeller & jet aviation concepts. The U.S. Navy was interested in Bell's design for an assault transport with VTOL capability, that could fit on carrier elevators and the duct around the props would provide safety to personnel working in ship's flight deck. In 1962, Navy selected this ducted-fans design for the Tri-Services program, and signed a contract with Bell for the research test-bed, designated the X-22A. The first flight was completed successfully on March 1966. Five months later, during its 15th flight, it was involved in a major accident that caused by a dual hydraulic system failure. The remaining parts from the damaged airplane were used to complete the second X-22A which took over the flight test program. It first flew a year later in 1967. After completing over 300 flights, flight research was finished and the program was ended in 1984.