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U.S. Navy. Via Francillon (1979).
The Nakajima
Ha-109
was also known as the Army Type 2 radial or by the standardized
designation, Nakajima [Ha-34] 11. It was a further development of
the Ha-41. It was an
air-cooled
14-cylinder double-row radial engine with a 140mm bore and 130mm
stroke
and a nominal power rating of 1450 horsepower (1081kW), making it
one
of the most powerful Japanese piston engines. Variants of
this engine were
used on the Ki-44 "Tojo"
and
the Ki-49 "Helen". The
Navy designated it the NK5A but it saw no operational use on Navy
aircraft.
References
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