Fokker S . 14 Machtrainer The Fokker S - 14 Machtrainer was a Dutch two - seater military training jet aircraft designed and manufactured by Fokker for the Royal Netherlands Air Force . Development started in the late 1940s , and it was one of the first jet fighter training aircraft in the world , making its first flight on 19 May 1951 and entering service in 1955 . Design and development . 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 S . 14 was a low - winged monoplane of all - metal construction . In order to aid use in its role as a trainer , the crew of two sat side by side on Martin - Baker ejection seats , with room in the spacious cockpit for a third crew member , although this capability was never used . This gave a fairly wide fuselage . It had a retractable tricycle undercarriage , and was powered by a single Rolls - Royce Derwent engine mounted in the centre fuselage , fed from air inlets in the aircraft ' s nose . Three airbrakes were fitted to the rear fuselage . The wing design and size allowed for the aircraft to land at much lower speeds than most jet aircraft at the time . The first prototype , powered by a Derwent V engine , and registered " PH - NDY " , made its maiden flight on 19 May 1951 , and despite being damaged when its undercarriage failing to extend on its second flight later the same day , was displayed at the Paris Air Show later that year . The Royal Netherlands Air Force placed an order for 20 S . 14s , with the more powerful Rolls - Royce Derwent 8 engine . Fokker had great hopes for exporting the Machtrainer , with Brazil planning to build 50 Rolls - Royce Nene powered Machtrainers under licence . The first prototype was refitted with a 5 , 100 lb ( 22 . 7 kN ) Nene III engine , flying on 25 October 1953 , this increasing the Machtrainer ' s maximum speed to 831 km . h ( 516 mph ) . In addition , the American aircraft manufacturer Fairchild , which later also built the Fokker Friendship under license , hoped to win an order for the aircraft from the United States Air Force . The Brazilian plans evaporated following political changes in Brazil , while Fairchild abandoned its production plans . Although several other countries also tested the aircraft , orders did not materialize . Compared to other dedicated jet trainer designs of the same period such as the Fouga Magister , this aircraft had higher operational costs . Operational history . The Machtrainer entered service in October 1955 , deliveries continuing until November 1956 . Only 19 of the 20 aircraft ordered by the Netherlands Air Force entered service , one being destroyed in a fatal crash in the United States while being used by Fokker as a demonstrator prior to delivery . The S . 14 continued in use for over a decade , with a second being lost in a fatal crash in 1964 . Of the original production , two were lost in accidents and most of the rest were scrapped in the years that followed . Three still exist today including the original prototype ( K - 1 , PH - XIV ) , which was operated by the Nationaal Lucht en Ruimvaart Laboratorium ( NLL ) , located at Amsterdam ' s Schiphol Airport , until retirement in March 1966 . It was then displayed at the Aviodome museum at Schiphol before moving to the museum at Lelystad Airport by 2008 . The production aircraft L - 11 is preserved at the Royal Netherlands Air Force museum in Soesterberg . L - 17 is undergoing renovation . There was a fourth , L - 18 , which had sat by a gate entrance at the Fokker works at Ypenburg , but it was scrapped in 1994 when it was closed .