In the late 1990s Duncan Aviation of Michigan developed its Xantus V/STOL design N44CX, named after a species of hummingbird and designed by Terry Duncan, a lead engineer for Williams International.
It featured four 80 hp Hirth F30 engines placed at wingtips fore and aft of the fuselage, and was unveiled to the public for the first time at AirVenture ’99.
The company predicted that the four-passenger tilt-prop aircraft would take off and land vertically, and cruise at 290 mph with a range of up to 800 nm.
After receiving an airworthiness certificate from the FAA on July 7, 1999, the aircraft made its first tentative hovering flight on July 11. Its current disposition is unknown.
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