Fokker/Republic D-24 Alliance

The Fokker/Republic D.24 was a supersonic variable-sweep wing concept aircraft designed from 1962 to 1968 by the Fokker-Republic Alliance, a coalition between Fokker and Republic Aviation. The project was based at Schiphol in the Netherlands and led by Alexander Wadkowski of Republic Aviation. The D.24 was designed to be capable of vertical take-off and landing and in accordance with NATO Basic Military Requirement 3, and it competed in NATO's BMR-3 bidding. It was to have a single crew member and one Bristol Siddeley BS.100 vectored-thrust turbofan engine for lift and cruise, with a design maximum speed of Mach 1.5 at sea level and Mach 2.4 at 70,000 feet and a range of 4,828 km. Only a scale model was built, and it is now kept at the Aviodrome aviation museum in Lelystad in the Netherlands.