Hirth HM 508
| HM 508 | |
|---|---|
| |
| Type | Inline inverted 'V' piston engine |
| Manufacturer | Hirth |
| Major applications | Messerschmitt Bf 108 |
The Hirth HM 508 was an air-cooled, eight-cylinder, 60° cylinder bank angle inverted-V aircraft engine built in Germany in the 1930s.[1] It had a bore and stroke of 105 mm × 115 mm (4.1 in × 4.5 in) and developed 210 kW (280 hp) at 3,000 rpm.
Variants
- HM 8U
- HM 508A
- HM 508B
- HM 508C
- 180 kW (240 hp)
- HM 508D
- 210 kW (280 hp) at 3000 rpm[2]
- HM 508E
- 150 kW (200 hp)
- HM 508F
- HM 508G
- HM 508H
- 180 kW (240 hp), low fuel consumption variant, with centrifugal supercharger geared at 3.86:1 crankshaft speed for long-range record breaking aircraft.
Applications
- Ambrosini S.7
- Gotha Go 146
- Gotha Go 149
- Heinkel He 116
- IMAM Ro.63
- Messerschmitt Bf 108
- Siebel Fh 104
Specifications (HM 508D)
Data from Jane's fighting aircraft of World War II[2], Jane's all the World's Aircraft 1938[3]
General characteristics
- Type: 60° V-8, inverted air-cooled piston engine
- Bore: 105 mm (4.13 in)
- Stroke: 115 mm (4.53 in)
- Displacement: 7.97 L (486 cu in)
- Length: 1,289 mm (50.75 in)
- Width: 683 mm (26.89 in)
- Height: 815 mm (32.09 in)
- Dry weight: Dry 208 kg (459 lb): Fully equipped 221 kg (487 lb)
Components
- Supercharger: Centrifugal supercharger geared at 4.46:1 crankshaft speed
- Fuel system: 2x Pallas-Zenith VAH2 carbutettors
- Fuel type: Gasoline
- Oil system: Pressure system for crankshaft, pistons and reduction gear: splash lubrication for camshaft and supercharger
- Cooling system: Air-cooled
- Reduction gear: 1.5:1 - Stoekicht sun and planet gears
- 1x Double Bosch magneto
Performance
- Power output: Maximum 210 kW (280 hp) at 3,000 rpm: Rated power 192 kW (258 hp) at 2,790 rpm
- Compression ratio: 6:1
See also
Comparable engines
Related lists
References
- ^ Gunston, Bill (1989). World encyclopaedia of aero engines (Fully rev. 2nd ed.). London: P. Stephens. p. 77. ISBN 1-85260-163-9.
- ^ a b Bridgman, Leonard, ed. (1989). Jane's fighting aircraft of World War II (1995 ed.). New York: Military Press. p. 294. ISBN 0517679647.
- ^ Grey, C.G.; Bridgman, Leonard, eds. (1938). Jane's all the World's Aircraft 1938. London: Sampson Low, Marston & company, ltd. pp. 60d–61d.