de Havilland Gipsy Twelve
| Gipsy Twelve/Gipsy King | |
|---|---|
 | |
| de Havilland Gipsy Twelve at the Science Museum (London) | |
| Type | Piston V-12 inline aero-engine |
| Manufacturer | de Havilland Engine Company |
| First run | 1937 |
| Major applications | de Havilland Don de Havilland Albatross |
| Number built | 95 |
The de Havilland Gipsy Twelve was a British aero engine developed by the de Havilland Engine Company in 1937. Approximately 95 were manufactured. It was known as the Gipsy King in Royal Air Force service.
Applications
Engines on display
Preserved de Havilland Gipsy Twelve engines are on public display at the following museums:
Specifications (Gipsy King I)
Data from Lumsden[1]
General characteristics
- Type: Inverted 60 degree V-12 inline piston engine
- Bore: 4.646 in (118 mm)
- Stroke: 5.512 in (140 mm)
- Displacement: 1121.3 cu in (18.3 L)
- Length: 82.6 in (2,098 mm)
- Width: 31.5 in (800 mm)
- Height: 37.4 in (950 mm)
- Dry weight: 1,058 lb (480 kg)
Components
- Valvetrain: Overhead valve
- Supercharger: Single speed
- Fuel type: 87 Octane petrol
- Cooling system: Air cooled
- Reduction gear: Spur geared, reduction ratio 0.667:1
Performance
- Power output: 425 hp at 2,450 rpm at 0 psi boost (five minutes maximum)
- Compression ratio: 6:1
- Power-to-weight ratio: 0.4 hp/lb
See also
- Comparable engines
- Related lists
References
Notes
- ↑ Lumsden 2003, p.147
Bibliography
- Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
External links
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