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Kjeller Flyvemaskinsfabrik F.F.9 Kaje
F.F.9 Kaje I
Designed and built by the Norwegian Army Air Service's aircraft manufacturer Kjeller Flyfabrikk, work on the FF9 Kaje trainer aircraft started in 1921. The aircraft body was designed in Norway, designed by Einar Sem-Jacobsen while the wing was licensed by German construction (Göttingen profile). The wings were made of wood paneling fabric covered.
It was built in three series: the Kaje I of which ten were built in 1921 and 1922, the Kaje II of which four were built in 1925 and five Kaje III in 1926. The models differed slightly in wing profile, wingspan and rudder surfaces, based on experience with the previous model.
The Kaje was constructed primarily of wood with fabric covering, but it had bad spin characteristics.
Although primarily used as a training plane and for reconnaissance, the aircraft could also carry arms and was tested with radio equipment.
The aircraft was in use with the Norwegian Army Air Service until 1937. A preserved example is at the Norwegian Aviation Museum in Bodø.
Kaje III
Engine: 1 × Marabini 6-cyl, 89 kW (120 hp) (license built Mercedes D.II)
Length: 8.4 m (27 ft 7 in)
Wingspan: 9.5 m (31 ft 2 in)
Maximum speed: 132 km/h (82 mph; 71 kn)
Range: 375 km (233 mi; 202 nmi)
Service ceiling: 3,200 m (10,500 ft)
Crew: two

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