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Nakajima Ki-8

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Title: Nakajima Ki-8  
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Nakajima Ki-8

Ki-8
Nakajima Ki-8
Role prototype fighter aircraft
Manufacturer Nakajima Aircraft Company
First flight 1934
Primary user IJA Air Force
Number built 5

The Nakajima Ki-8 (キ8 Ki-hachi?) was an unsuccessful attempt by Nakajima Aircraft Company to interest the Imperial Japanese Army Air Force in a two-seat modern monoplane fighter.[1]

Design & Development

Development of the Ki-8, (aka Nakajima DF), began in 1933, based on an all-metal two-seat aircraft, featuring low inverted gull wings, with fixed and spatted landing gear, powered by a single 410 kW (550 hp) Nakajima Kotobuki Ha-1-3 radial engine. Proposed armament consisted of twin 7.7 mm (.303 in) machine guns firing from between the engine cylinders and a third 7.7 mm (.303 in) machine gun on a flexible mount on the back of the cockpit.

In initial testing, the aircraft proved unpopular with test pilots, who raised concerns about the design's aerodynamic stability . The initial prototypes were also plagued with a variety of manufacturing defects and malfunctions. Though corrections were made to improve initial design and stability problems, the performance of the aircraft was considered no better than the existing Nakajima Type 91 fighter, and as the Japanese Army Air Force had no use for two-seat fighters,[2] the project was cancelled in 1934, after prototype five aircraft had been produced, and before the start of full production.

Variants

  • Nakajima Ki-8 : initial prototype (5 built)

Operators

 Japan
  • Imperial Japanese Army Air Force

Specifications (Ki-8)

Data from Famous Airplanes of the World, first series, #76: Army Experimental Fighters (1)[3]

General characteristics
  • Crew: 2
  • Length: 8.17 m (26 ft 9.6 in)
  • Wingspan: 12.88 m (42 ft 3.1 in)
  • Height: 3.57 m (11 ft 8.5 in)
  • Wing area: 28.5 m2 (306.78 ft2)
  • Empty weight: 1,525 kg (3,362 lb)
  • Gross weight: 2,111 kg (4,654 lb)
  • Powerplant: 1 × Nakajima Ha-1 Kotobuki air-cooled radial engine, 410 kW (550 hp) each

Performance

  • Maximum speed: 328 km/h (204 mph)
  • Range: 1,000 km (621 miles)
  • Service ceiling: 8760 m (28,740 ft)
Armament
  • 2× 7.7 mm (.303 in) forward-firing machine guns
  • 1× 7.7 mm (.303 in) dorsal flexible machine gun
  • References

    Notes
    Bibliography
    • Unknown author. Famous Airplanes of the World, first series, #76: Army Experimental Fighters (1). Tokyo: Bunrin-Do, August 1976.
    • Unknown author. Famous Airplanes of the World, second series, #24: Army Experimental Fighters. Tokyo: Bunrin-Do, September 1990.


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