Editing Bell X-22 (section)

==Design and development==
In 1962, the [[United States Navy]] announced their request for two [[prototype]] aircraft with V/STOL capability, powered by four ducted fan nacelles. Bell Helicopters already had extensive experience with [[VTOL]] aircraft and was able to utilize an already developed test mockup. In 1964 the prototype, internally referred to by Bell as Model D2127, was ordered by the Navy and received the X-22 designation. It was unveiled at an event in Niagara Falls in May 1965.<ref>{{cite news |title=It isn't science fiction |newspaper=Pottstown Mercury |date=June 4, 1965 |page=12 }}</ref><ref>{{cite news |title=Unveil aircraft |newspaper=Lebanon Daily News |date=May 26, 1965 |page=24 }}</ref>

Three-bladed propellers were mounted on four wings and synchronized through a wave-interconnection system, were connected to four [[gas turbine]]s which, in turn, were mounted in pairs on the rear wings. Maneuvering was achieved by tilting the propeller blades in combination with control surfaces ([[Elevator (aeronautics)|elevators]] and [[aileron]]s), which were located in the [[thrust]] stream of the propellers.