Designed by Dutch engineer Frederick Koolhoven, the F.K.25 was developed to replace the Sopwith Snipe. This is the second prototype, the first having been lost during an attempt to set a new world altitude record. The F.K.25 was powered by the ABC Dragonfly engine, which was hopelessly unreliable. The project was abandoned when Koolhoven left the British Aerial Transport Company at the end of 1919. Photo from: Imperial War Museums