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Nakajima G8N

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G8N Renzan
Role

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Manufacturer

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First flight

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Retired

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Primary user

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Produced

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The Nakajima G8N Renzan (連山, "Mountain Range") was a four-engine long-range bomber designed for use by the Imperial Japanese Navy. The Navy designation was "Type 18 land-based attack aircraft" (十八試陸上攻撃機); the Allied code name was "Rita".

Design and development

In February 1943 the Imperial Navy staff asked Nakajima Aircraft Company to design a four-engined bomber, capable of meeting an earlier specification set for a long-range land-based attack plane. The final specification, issued on 14 September 1943, called for a plane with a maximum speed of Script error: No such module "convert". able to carry a Script error: No such module "convert". bomb-load Script error: No such module "convert". or a reduced bomb-load Script error: No such module "convert"..[1]

Nakajima's design featured a mid-mounted wing of small area and high aspect ratio, a tricycle landing gear and a large single-fin rudder. Power came from four 2,000 hp Nakajima NK9K-L "Homare" 24 radial engines with Hitachi 92 turbosuperchargers driving four-bladed propellers. The engines were cooled by counter-rotating fans positioned just inside the engine cowlings.[1] Defensive armament included power-operated nose, dorsal, ventral and tail turrets along with two free-swiveling machine guns at the beam positions.[2]

Operational history

File:Nakajima G8N war booty.jpg
A captured G8N with a C-45 and T-6

The initial prototype was completed in October 1944 and delivered to the Navy for testing in January 1945, a year after the Navy ordered development to start. Three further examples were completed by June 1945, with the third prototype being destroyed on the ground by US carrier aircraft.[2]

Other than minor problems with the turbosuperchargers, the Renzan performed satisfactorily and the Navy hoped to have a total of 16 prototypes and 48 production-version G8N1s assembled by September 1945. But the worsening war situation and a critical shortage of light aluminium alloys led to the project's cancellation in June.[2]

One proposed variant was the G8N2 Renzan-Kai Model 22, powered by four 2,200 hp Mitsubishi MK9A radial engines and modified to accept attachment of the air-launched Ohka Type 33 Special Attack Bomber.[2]

Just prior to Japan's surrender in August 1945 consideration was also briefly given to producing an all-steel version of the aircraft, to be designated G8N3 Renzan-Kai Model 23, but the cessation of hostilities precluded any further development.[2]

After the war, one prototype was taken to the United States[3][4] and scrapped after testing. None are in existence today.

Variants

  • G8N1 : Four-engine heavy bomber. Production version.
  • G8N2 : Modified to carry Ohka Type 33 Special Attack Bomber. Four Mitsubishi MK9A radial engines.
  • G8N3 : All-steel airframe.

Operators

Template:Country data Japan

Specifications (G8N1)

Data from Japanese Aircraft of the Pacific War[2]

General characteristics

Performance

See also

Aircraft of comparable role, configuration and era

References

Notes
Bibliography
  • Collier, Basil. Japanese Aircraft of World War II. New York: Mayflower Books, 1979. ISBN 0-8317-5137-1.
  • Francillon, Ph.D., René J. Japanese Aircraft of the Pacific War. London: Putnam & Company Ltd., 2nd edition 1979. ISBN 0-370-30251-6.
  • Thorpe, Donald W. Japanese Naval Air Force Camouflage and Markings World War II. Fallbrook, California: Aero Publishers, Inc., 1977. ISBN 0-8168-6583-3. (hc.) ISBN 0-8168-6587-6 (pbk.)
  • Unknown authors. Famous Airplanes of the World: Nakajima Shinzan / Renzan (Volume 11, no.146). Japan: Bunrin-Do, Nov. 1984.
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