Nakajima provided Japan with its first large radials by building licensed Bristols beginning in the late 1920s, and Gnome-Rhone engines beginning in 1936. Nakajima built three 14-cylinder radial engines. The pre-World War II Mamoru possibly shares characteristics with the Pratt & Whitney R-2000. It was the most powerful 14-cylinder engine ever built, with versions at 1,790 kW (2,400 hp) and one of the largest at L (2,715 cu. in.). This engine is of the type that powered the World War II Japanese Nakajima B6N Navy Carrier Attack Bomber Tenzan Type 11 (Allied Code Name Jill). Between 1
Nakajima provided Japan with its first large radials by building licensed Bristols beginning in the late 1920s, and Gnome-Rhone engines beginning in 1936. Nakajima built three 14-cylinder radial engines. The pre-World War II Mamoru possibly shares characteristics with the Pratt & Whitney R-2000. It was the most powerful 14-cylinder engine ever built, with versions at 1,790 kW (2,400 hp) and one of the largest at L (2,715 cu. in.). This engine is of the type that powered the World War II Japanese Nakajima B6N Navy Carrier Attack Bomber Tenzan Type 11 (Allied Code Name Jill). Between 1941 and 1944, 200 engines of all Mamoru series were manufactured, but these were generally not considered successful. After 1945, the company became Fuji, building airframes only.
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