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The Nakajima G10N Fugaku (Japanese: 富岳 or 富嶽, "Mount Fujimarker"), was a planned Japanesemarker ultra-long-range heavy bomber designed during World War II.

Design and development

The Fugaku had its origins in "Project Z", a 1942 specification for an intercontinental bomber which could take off from the Japanese-occupied Kuril Islandsmarker, bomb the continental United Statesmarker, then continue onward to land in German-occupied Francemarker. Once there, it would be refitted and make another return sortie.

Project Z called for three variations on the airframe: 4,000 bombers, 5,000 transports (capable of carrying 600 troops), and 2,000 strafing attack aircraft, which would carry 400 downward-firing machine guns in the fuselage, for intense ground attack at the rate of 6,400 rounds per second.

While the project was conceived by Nakajima head Chikuhei Nakajima, Kawanishi and Mitsubishi also made proposals for the Fugaku. The Nakajima design had straight wings and contra-rotating four-blade propellers; the Kawanishi design had elliptical wings and single four-blade propellers. To save weight, some of the landing gear was to be jettisoned after takeoff (being unnecessary on landing with an empty bombload), as had been planned on some late-war German very long range bomber designs. Both designs used six engines.

Development started in 1943, with a design and manufacturing facility built in Mitaka, Tokyo. While Nakajima's 4-row 36-cylinder Ha-54 engine was abandoned as too complex, Mitsubishi successfully built the 2-row 22-cylinder Ha-50 engine for the Kawanishi design, testing three units in May 1944. An example of this engine was unearthed in 1979 during expansion of Haneda Airportmarker and is on display at the Narita Aerospace Museum.

Project Z was cancelled in July 1944, and the Fugaku was never built.

Operators (planned)

Specifications (projected)

See also




  • Francillon, René J. Japanese Aircraft of the Pacific War. London: Putnam & Company Ltd., 2nd edition 1979. ISBN 0-37-030251-6.
  • Idei, Tadaaki. 'Hikōki Mechanism Zukan', Tokyo: Guranpuri Shuppan, 1985.
  • Ogawa, Toshihiko. Nihon Kōkūki Daizukan, 1910-1945, Tokyo: Kokushokankōkai, 1993.

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