The Hiro Type 91, (full designation Hiro Type 91 520 hp water-cooled W-12), was a 12-cylinder, water-cooled,
W engine
A W engine is a type of piston engine where three or four cylinder banks share the same crankshaft, resembling the letter "W" when viewed from the front.
W engines with three banks of cylinders are also called "broad arrow" engines, due to thei ...
developed for aircraft use by the
Imperial Japanese Navy
The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, Potsdam Declaration, when it was dissolved followin ...
in the mid-1930s. Power was in the 450 kW (600 hp) range. Its design was derived from the
Hiro Type 90 Hiro may refer to:
People
* Hiro (given name), includes lists of people with the given name
* Hiro (photographer) (1930–2021), Japanese-born American photographer
* Hiro (singer) (born 1991), French singer
* Hiroko Shimabukuro (born 1984), Japa ...
. An enlarged more powerful engine, the
Hiro Type 90 Hiro may refer to:
People
* Hiro (given name), includes lists of people with the given name
* Hiro (photographer) (1930–2021), Japanese-born American photographer
* Hiro (singer) (born 1991), French singer
* Hiroko Shimabukuro (born 1984), Japa ...
600 hp water-cooled W-12 had also been developed, producing 600 hp.
Applications
*
Aichi E10A
*
Aichi E11A
*
Hiro H4H
*
Kawanishi E7K
The Kawanishi E7K was a Japanese three-seat reconnaissance seaplane mainly in use during the 1930s. It was allocated the World War II Allied names for Japanese aircraft, reporting name Alf by the Allies of World War II.
Design and development
In ...
*
Mitsubishi Ka-9
Specifications (Type 91 500hp-1)
See also
References
*
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{{DEFAULTSORT:Hiro Type 91 (Engine)
1930s aircraft piston engines