Hiro Type 94

Type 94
TypeW18 liquid-cooled aircraft engine
National originJapan
ManufacturerHiro Naval Arsenal
First run1933
Major applicationsHiro G2H
Developed fromHiro Type 91

The Hiro Type 94 was a W18 liquid-cooled aircraft engine. It was the first indigenous Japanese aero engine to achieve a power output of more than 1,000 hp (746 kW). Two Type 94 engines powered the Imperial Japanese Navy's Hiro G2H land-based bomber, which first flew in 1933.

Unlike earlier Hiro W engines, which used Lorraine-Dietrich style cast cylinder pairs, the Type 94 used monobloc castings for each of its three six-cylinder banks. The angle between the cylinder banks was also reduced from 60° to 45° which gave the engine a narrower profile thereby reducing aerodynamic drag.

Applications

Specifications

Data from Goodwin

General characteristics

Components

Performance

See also

Comparable engines

Related lists

Notes

  1. ↑ Development work was undertaken on a supercharged variant of the engine; however, it did not enter production.

References

  1. 1 2 3 4 5 Goodwin, Mike; Starkings, Peter (2017). Japanese Aero-Engines 1910–1945. MMP Books. pp. 76–77. ISBN 978-8365281326.
  2. ↑ Mikesh, Robert C.; Abe, Shorzoe (1990). Japanese Aircraft, 1910–1941. Naval Institute Press. p. 100. ISBN 978-0870218538.