Fokker S.14 Mach-Trainer


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Fokker S.14 Mach-Trainer

The Fokker S.14 Mach-Trainer secured its place in aviation history by being the first Fokker-designed jet aircraft, the first jet-propelled trainer designed as such, and the first aircraft of its type to enter production.

The low-wing all-metal S.14 was powered by a Rolls-Royce Derwent turbojet with a bifurcated inlet in the nose. The outlet was in the extreme tail, aft of the horizontal tail surfaces, which were set somewhat aft of the fin and rudder. The nosewheel of the tricycle landing gear retracted forwards into the underside of the nose while the main units retracted inwards into the undersides of the wings. Pupil and instructor were seated side-by-side under a short, broad raised canopy set well forward on the circular-section fuselage. Martin-Baker ejector seats were standard.

Test pilot Gerben Sonderman made the first test flight on 19 May 1951. On a second flight during the same day the landing gear failed and the prototype was damaged in the subsequent belly-landing. However, the aircraft was repaired and displayed at the 1951 Paris Salon in June of that year.

A series of 20 S.14s was ordered by the Royal Dutch air arm, the Koninklike Luchtmacht, the first being flown initially on 15 January 1955. The prototype bore the serial K-1 and was powered by a Derwent V engine, while the production machines were serialled from L-1 to L-20 and had Derwent VIIIs. The S.14s served at four air stations: Twenthe, Ypenburg, Gilze-Rijen and Soesterberg. Aircraft L-4 was demonstrated in the USA during 1955, but crashed on 20 October that year at Hagerstown, Maryland, killing Gerben Sonderman. Aircraft L-8 took part in the London-Paris air race, known as the Arch to Arc since it started at Marble Arch and ended at the Arc de Triomphe. The last two S.14s were withdrawn from Dutch service on 29 March 1965. Serialled L-17 and L-19, they are preserved at the Museums at Schiphol and Soesterberg respectively.

The original K-1 prototype was re-engined with a 2313kg thrust Rolls-Royce Nene 3 engine in 1953 and given the specially selected civil registration PH-XIV on 24 October 1960. It was then used by the Lucht en Ruuimtevaart Laboratorium (Dutch National Aeronautical and Space Laboratory) until scrapped on 4 March 1966.

 ENGINE1 x Rolls-Royce Derwent VIII turbojet, 1575kg
  Take-off weight5350 kg11795 lb
  Loaded weight3765 kg8300 lb
  Wingspan12.00 m39 ft 4 in
  Length13.30 m44 ft 8 in
  Height4.70 m15 ft 5 in
  Wing area31.80 m2342.29 sq ft
  Max. speed730 km/h454 mph
  Cruise speed570 km/h354 mph
  Ceiling11200 m36750 ft
  Range965 km600 miles

George Bornhijm, e-mail, 16.03.2021 06:12

where is the Fokker S-11?


Raymond Abraas, e-mail, 27.09.2013 18:41

The S-14 with registration PH-XIV was not scrapped as suggested above. It is preserved at the "Aviodrome" museum in Lelystad.


Nico Braas, e-mail, 29.10.2010 11:16

If you want to know everything on the S-14: I have written a book on this type, together with my good friend Willem Vredeling.
Titel: Fokker S.14 Machtrainer
Publisher: Geromy B.V., Gageldijk 83 /P.O. Box1040, 3600BA Maarssen -The Netherlands
ISBN: 978-90-804981-5-0
Book was published end October 2009. It has 200 pages with some 160 photo's, many official Works drawings and colour profiles!


Bas, e-mail, 05.06.2010 18:47

The reason no foreign orders were placed was the T-33. Available in large numbers, cheap or even for 'free' when delivered under MDAP conditions.
There were plans for follow-up versions, but they never materialized and only exist on the drawing board.


Scott E. Green, e-mail, 27.05.2010 18:57

Does anyone have any ideas as to why it lacked foreign orders and were there plans for followup versions.


eddie, e-mail, 29.07.2008 21:26

the Ikarus companie only made 3 jet propelled aircraft
they where siglle seat arcaft and no trainers at all!!!
the the Ikarus 451-M was Yugoslavia's first jet-propelled aircraft
from wiki: "Yugoslavia's first domestically-designed and built jet plane (1952)"
it was build and designed in '52 the fokker was already flying in '51
and the ikarus was NOT designed as a trainer!!


Wasa, 30.12.2007 14:48

Not in insult Holand, but the first jet training plane it is created in Yugoslavia by company Ikarus in 1949. Greetings from Russia.


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