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 use 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 their shap ...
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, when it was dissolved following Japan's surrender ...
in the mid-1930s. Power was in the 450 kW (600 hp) range. Its design was derived from the
Napier Lion
The Napier Lion is a 12-cylinder, petrol-fueled 'broad arrow' W12 configuration aircraft engine built by D. Napier & Son from 1917 until the 1930s. A number of advanced features made it the most powerful engine of its day and kept it in produ ...
. An enlarged more powerful engine, the
Hiro Type 90 Hiro may refer to:
Arts and entertainment
* ''Hiro'' (film), a Canadian short film
* Hiro (TV channel), an Italian channel
* " Hiro's Song", by Ben Folds
* " Yuko and Hiro", a Blur song
* "Letter from Hiro", a song by The Vapors, off New Clear D ...
600 hp water-cooled W-12 had also been developed, producing 600 hp.
Applications
*
Aichi E10A
*
Aichi E11A
*
Hiro H4H
The Hiro H4H (or Hiro Navy Type 91 Flying Boat) was a 1930s Japanese bomber or reconnaissance monoplane flying boat designed and built by the Hiro Naval Arsenal for the Imperial Japanese Navy.
Design and development
First appearing in 1931 the H ...
*
Kawanishi E7K
The Kawanishi E7K was a Japanese three-seat reconnaissance seaplane mainly in use during the 1930s. It was allocated the reporting name Alf by the Allies of World War II.
Design and development
In 1932 the Imperial Japanese Navy requested the K ...
*
Mitsubishi Ka-9
Specifications (Type 91 500hp-1)
See also
References
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{{DEFAULTSORT:Hiro Type 91 (Engine)
1930s aircraft piston engines