In the late 1940s, the Dutch aircraft manufacturer, Fokker, realising that the increasing use of jet-powered fighters meant that existing piston-engined advanced trainers had insufficient performance, started design of a jet-engined advanced trainer, the S.14 Machtrainer.
The Royal Netherlands Air Force placed an order for 20 S.14s, with the more powerful Rolls-Royce Derwent 8 engine [REF].