[1] The F.K.56 was a low-wing monoplane powered by a 450 hp (336 kW) Wright Whirlwind R-975-E3 radial piston engine.

[1] Designed as a basic trainer, the F.K.56 had two seats in tandem for the instructor and pupil under a fully enclosed canopy.

[1] The first prototype flew on 30 June 1938 and had fixed conventional landing gear and an inverted gull wing.

[1] Ten aircraft were ordered by the Netherlands Army based on the design of the third prototype.

[1] Earlier in February 1940 the Belgians had ordered twenty F.K.56 basic trainers and seven had been delivered before the rest were destroyed in an air raid on the Waalhaven factory.