de Havilland Gipsy Twelve
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.
| 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 |
Applications
Engines on display
Preserved de Havilland Gipsy Twelve engines are on public display at the following museums:
- de Havilland Aircraft Heritage Centre
- London Science Museum.
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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