Hiro Type 94
| Type 94 | |
|---|---|
| Type | W18 liquid-cooled aircraft engine |
| National origin | Japan |
| Manufacturer | Hiro Naval Arsenal |
| First run | 1933 |
| Major applications | Hiro G2H |
| Developed from | Hiro 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).[1] Two Type 94 engines powered the Imperial Japanese Navy's Hiro G2H land-based bomber, which first flew in 1933.[1][2]
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.[1]
Applications
[edit]- Hiro G2H land-based bomber
Specifications
[edit]Data from Goodwin[1]
General characteristics
- Type: 45° W-18 liquid-cooled piston engine
- Bore: 145 mm (5.7 in)
- Stroke: 160 mm (6.3 in)
- Displacement: 47.5 L (2,899 cu in)
- Length: 2,175 L (132,727 cu in)
- Width: 1,110 mm (43.7 in)
- Height: 1,104 mm (43.5 in)
- Dry weight: 740 kg (1,631 lb)
Components
- Supercharger: Naturally aspirated[a]
- Cooling system: Liquid
- Reduction gear: 0.5:1
Performance
- Power output: 880 kW (1,180 hp)
- Compression ratio: 6
See also
[edit]Comparable engines
Related lists
Notes
[edit]- ↑ Development work was undertaken on a supercharged variant of the engine; however, it did not enter production.[1]
References
[edit]- 1 2 3 4 5 Goodwin, Mike; Starkings, Peter (2017). Japanese Aero-Engines 1910–1945. MMP Books. pp. 76–77. ISBN 978-8365281326.
- ↑ Mikesh, Robert C.; Abe, Shorzoe (1990). Japanese Aircraft, 1910–1941. Naval Institute Press. p. 100. ISBN 978-0870218538.