The D-24 Alliance was a 1965 proposal for a NATO VTOL fighter that Fokker intended to develop with Republic.
There is a model of the aircraft in the Netherlands Air Museum in Lelystad.
The D-24 would have been somewhat akin to the Republic XF-103, though slower. It would have had a range of 3,000 miles at Mach 1.5, and an internal weapons carriage of multiple long-range air-to-air missiles. It was intended to defeat the atmospheric threat — high performance, cruise-missile launching bombers. It would feature autonomous sensing, so there would have been no dependence on AWACS, nor on aerial refuelling
It was proposed that the vectored-thrust Bristol Siddeley BS.100/3 with a thrust potential of 17500kg be used by the Alliance, with plenum chamber burning in the two forward swiveling nozzles,