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Haerens Flyfabik FF9 Kaje
Kjeller Flyvemaskinsfabrik F.F.9 Kaje
F.F.9 Kaje I
F.F.9 Kaje was the last in a series of own constructions in wood and canvas at Hærens Flyvemaskinfabrik at Kjeller. Designed and built by the Norwegian Army Air Service's aircraft manufacturer Haerens Flyfabik, 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.
The prototype was ready for test flight in November 1921.
Kjeller FF9 Kaje I in Bodø
The aircraft replaced older school aircraft and became a robust and reliable machine with good flight characteristics.Until June 1924, the designation was for the aircraft type F.F.9, when it was decided that the aircraft should be referred to as "Kaje".
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.
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 from 1922 to 1935. A preserved example is at the Norwegian Aviation Museum in Bodø.
Kaje I
Ten built.
Kaje II
Four built.
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)
Height: 3.23 m
Max weight: 1060 kg
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
Five built.
Kaje III
Engine: 1 × Marabini 6-cyl, 89 kW (120 hp) (license built Mercedes D.II)
Wing span: 10.37 m
Length: 8.10 m
Height: 3.30 m
Max T O weight: 1080 kg
Maximum speed: 135 km / h

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