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Kimura HK-1
The Kimura HK-1 was a glider designed by Hidemasa Kimura and built by Ito Airplane Works in Japan in 1939 to investigate the possibilities of tailless aircraft. It was a single-seat design with an open cockpit, swept wings, and a single tail fin. The HK-1 made a total of 169 test flights between 15 December 1939 and 7 March 1940, towed aloft behind a car.
By this time, the glider's success had attracted the attention of the Army, which arranged to purchase the aircraft. It was taken to the Tachikawa factory for testing, but was crashed after only 13 flights, on 16 April 1940. The design proved sufficiently interesting for the Army to commission further research into the tailless concept, which would lead to the Kayaba Ku-2.
Wingspan: 10.00 m (32 ft 10 in)
Length: 3.50 m (11 ft 6 in)
Height: 1.80 m (5 ft 11 in)
Wing area: 14.0 m2 (151 ft2)
Maximum speed: 85 km/h (53 mph)
Crew: One pilot

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