Kayaba Ku-4

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The Kayaba Ku-4 was a research aircraft built in Japan in 1940 to investigate the possibilities of tailless designs. It followed designer Hidemasa Kimura's successful Ku-2 and Ku-3 designs for the Imperial Japanese Army. While these previous aircraft had been gliders, however, the Ku-4 was to be a powered by a pusher engine. It had a low, swept wing, and like the Ku-2, fins at the wingtips.

Work on the prototype was well advanced by April 1941, but the following month, Kimura's relationship with the Army soured following the crash of the Ku-2. The Ku-4 was cancelled, and Kimura eventually received only ¥17,000 of the ¥200,000 that had been promised for the development of his tailless designs.

Specifications (as designed)

General characteristics

Crew: One pilot
Length: 3.42 m (11 ft 3 in)
Wingspan: 9.80 m (32 ft 2 in)
Wing area: 9.0 m² (97 ft²)
Powerplant: 1 × piston engine, 90 kW (120 hp)

Performance

Maximum speed: 180 km/h (110 mph)
Range: 300 km (190 miles)

References

Wooldridge, E.T. "Japanese flying wings". History of the Flying Wing. Retrieved 29 April 2007.
日本飞翼的短暂研究

v t e Aircraft produced by Kayaba Industry

Heliplane Ka-Go Ka-1 Ka-2 Ku-2 Ku-3 Ku-4 Kimura HK-1

v t e Japanese Army Glider Designation System

Ku-1 Ku-2 Ku-3 Ku-4 Ku-5 Ku-6 Ku-7 Ku-8 Ku-9 Ku-10 Ku-11 Ku-12 Ku-13 Ku-14

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