Technical data:
Model: Koolhoven FK-51
Task: plane/Patrol
Crew: 2
Dimensions: Height: 9m
Length: 7.85m
Weight: 1000 kilogrammes
Loaded weight: 1550 kilogrammes
Performance: Maximum speed: 235 km/h
Cruise speed: 215 km/h
Ceiling: 5600 m.
Range: 730 km
Engine: Armstrong Siddeley Cheetah IX of 350 pkw (260 hp)
Armament:
Models 1 till 10: none
Models 11 till 25: one 7,7mm Lewis machine-gun in the wing
Models 400 till 428: two 7.7 mm machine-guns, 1 in the wing and 1 for the observer.
Production: 15 (MLD), 45 (drawer/knil), 54 (LuVa) and 28 (Spain)
Source:
http://www.go2war2.nl/artikel/249
Photo
Source:
http://www.cofe.ru/avia/K/photos_avia_K-32.htm