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Fokker S.I: Wikis


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Fokker S.I
Role Primary trainer
Manufacturer Fokker
Designed by Rheinhold Platz
First flight 1919
Primary users USSR
United States Army Air Service
Number built 3 (and one prototype)

The Fokker S.I was a 1910s Dutch primary trainer, the first of a family of trainers from the Fokker company.


The S.I was designed by Rheinhold Platz as a primary trainer with a cantilever parasol wing with two side-by-side seats for instructor and pupil in a wide cockpit. It first flew in early 1919 at Schwerin. Although the prototype performed well, the unusual cantilever parasol wing was not liked and only three production aircraft were built.

Two production aircraft were powered by 60 kW (80 hp) Rhone engines and were exported to the USSR and one other aircraft was built for the United States Army Air Service for evaluation at McCook Field. The USAAS aircraft was powered by a 67 kW (90 hp) Curtiss OX-5 engine and was designated the TW-4 (Trainer Water-cooled).


 Soviet Union
 United States

Specifications (TW-4)

General characteristics


Related lists


  • The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985), 1985, Orbis Publishing, Page 1899


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