Hirth HM 504
| Hirth HM 504 | |
|---|---|
 | |
| Hirth HM 504 on display at the Flugausstellung Hermeskeil | |
| Type | Inline piston engine |
| National origin | Germany |
| Manufacturer | Hirth-Motoren GmbH, Stuttgart-Zuffenhausen |
| Major applications | Bücker Bü 131 |
| Developed from | Hirth HM 60 |
| Developed into | Hirth HM 500 |
The Hirth HM 504 is a four-cylinder air-cooled inverted inline engine. The 504 was a popular engine for light aircraft of the 1930s-1940s and it was used to power a number of Germany's trainer aircraft of World War II. The engine featured a cast magnesium alloy crankcase.[1] The Hitachi Hatsukaze Model 11 was a Japanese licensed version.
Applications
- Bücker Bü 131
- Bücker Bü 181
- BŻ-1 GIL (helicopter)
- Klemm Kl 35
- Matra-Cantinieau MC-101 (helicopter)
- Morane-Saulnier MS.603
- Payen Arbalète
- Repülőgépgyár Levente II
Specifications (HM 504 A-2)
Data from Katz.[2]
General characteristics
- Type: 4-cylinder air-cooled inverted inline
- Bore: 105 mm
- Stroke: 115 mm
- Displacement: 3,998 cm3
- Length: 945 mm
- Width: 520 mm
- Height: 780 mm
- Dry weight: 107 kg
Components
- Valvetrain: 1 inlet and 1 exhaust valve per cylinder
- Cooling system: air
Performance
- Power output: 105 hp at 2,500 rpm
- Compression ratio: 6.2:1
- Fuel consumption: 228 g/PSh
- Oil consumption: 1.5-3 g/PSh
- Power-to-weight ratio: 2.87 lb/hp at cruise speed
See also
- Related development
- Comparable engines
- Alfa Romeo 110
- Argus As 8
- Blackburn Cirrus Minor
- de Havilland Gipsy Minor
- Elizalde Tigre IV
- Menasco C4 Pirate
- Related lists
References
Notes
Bibliography
- Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
External links
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