Nederlandse Modelbouw en Luchtvaartsite
Dutch Modelling and Aviation
Koolhoven FK.31
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In 1923 the LA-KNIL was looking for a fighter-reconnaissance aircraft. After comparing the Fokker C.V and the NVI FK-31 (also known as Koolhoven FK-31) the Fokker proofed to be much better.
Despite the outcome of the competition the LA ordered in 1924 also four NVI FK-31 to be able to test the air-cooled engine under tropical conditions.
They were delivered in March 1926. Because maintenance of the aircraft proofed to be difficult, the FK-31 was written of in 1930.