Nakajima Type 91
1931
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Nakajima Type 91

A Japanese army requirement of 1927 for a new single-seat fighter was contested by Nakajima, Kawasaki and Mitsubishi. All the designs were parasol-wing monoplanes developed in Japan by teams wholly or partly led by Europeans, in the case of Nakajima the French engineers Mary and Robin, Structural failure of the Mitsubishi prototype led to severe testing of the survivors, which were then also eliminated. The Nakajima: prototype, company designation NC, had a slim tapering monocoque fuselage, an uncowled Jupiter radial engine, and elaborate strut bracing connecting wings, fuselage and the wide-track landing gear. Nakajima persevered with the design and built six more prototypes, the last of the series being tested extensively by the Japanese army and accepted for production as the Army Type 91 Fighter Model 1. Retaining the same basic configuration as the NC prototype, this was virtually a redesign which resulted in a considerably refined airframe. Production of the Type 91 terminated in 1934 with the 450th aircraft; of these 22 were Army Type 91 Fighter Model 2 aircraft with modified engine cowlings. A Type 91 was converted for carrier operations and with spatted wheel fairings was submitted for the navy 7-Shi experimental fighter competition, but was rejected. The only other modification from standard army configuration was the use of a three-bladed propeller.

Introduced from 1932 onwards, the Type 91s were deployed in action with the four squadrons of the 11th Air Battalion operating with the army Kanto Command in Manchuria against the Chinese. In. 1933 the Type 91 was the principal army fighter and constituted the standard equipment for the newly formed air wings (or Hiko Rentai).

Nakajima Type 91


Specification 
 MODELType 91
 CREW1
 ENGINE1 x Nakajima "Kotobuki-2", 433kW
 WEIGHTS
    Take-off weight1500 kg3307 lb
    Empty weight1075 kg2370 lb
 DIMENSIONS
    Wingspan11 m36 ft 1 in
    Length7.3 m24 ft 11 in
    Height3 m10 ft 10 in
    Wing area20 m2215.28 sq ft
 PERFORMANCE
    Max. speed300 km/h186 mph
    Ceiling9000 m29550 ft
    Range500 km311 miles
 ARMAMENT2 x 7.7mm machine-guns

Comments
Angela, 18.06.2011

The only other modification from standard army configuration was the use of a three-bladed propeller.

, 18.06.2011

Nakajima Type 91
1931

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