Rolls-Royce Pennine
1940s British piston aircraft engine
Pennine | |
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Type | X-24 air-cooled sleeve-valve piston aero-engine |
National origin | United Kingdom |
Manufacturer | Rolls-Royce Limited |
First run | 1945 |
Number built | 1 |
Developed from | Rolls-Royce Exe |
The Rolls-Royce Pennine was a British 46-litre air-cooled sleeve valve engine with 24 cylinders arranged in an X formation. It was an enlarged version of the 22-litre Exe; a prototype engine was built and tested, but never flew.[1] The project was terminated in 1945, being superseded by the jet engine.[2]
A 100-litre 5,000 hp X32 (twin-X16) version of the Exe/Pennine, originally known as the Exe 100, was to have become the Rolls-Royce Snowdon.[3]
Rolls-Royce air-cooled engines, intended for commercial transport aeroplane use, were named after British mountains, e.g. The Pennines and Snowdon.
Specifications (Pennine)
General characteristics
- Type: 24-cylinder supercharged air-cooled 90 degree X layout aircraft piston engine
- Bore: 5.4 in (137.1 mm)
- Stroke: 5.0 in (127 mm)
- Displacement: 2791 in3 (45.73 L)
- Length: 106 in (2692 mm)
- Width: 39 in (991 mm)
- Height: 37.5 in (952 mm)
- Dry weight: 2,850 lb (1,293 kg)
Components
- Valvetrain: Sleeve valve
- Supercharger: Gear-driven centrifugal type supercharger, single stage, two speed
- Fuel type: Petrol
- Cooling system: Pressure air-cooled
Performance
- Power output: 2,740 hp (2,043 kW) at 3,500 rpm, +12 psi boost at sea level
- Power-to-weight ratio: 0.96 hp/lb (1.58 kW/kg)
See also
Related development
- Rolls-Royce Exe
Comparable engines
- Allison V-3420
- Junkers Jumo 222
- Napier Sabre
Related lists
References
Notes
Bibliography
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
- Rubbra, A.A. Rolls-Royce Piston Aero Engines - a designer remembers: Historical Series no 16 :Rolls-Royce Heritage Trust, 1990. ISBN 1-872922-00-7
- v
- t
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By name: | |
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By company designation: |
- Larch
- Rolls-Royce RZ.2
designations
and marine engines
Piston engines: | |
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Gas turbines: |
- Alan Arnold Griffith
- R.W. Harvey-Bailey
- Ernest Hives
- Stanley Hooker
- Gordon Lewis
- Adrian Lombard
- Cyril Lovesey
- Harry Ricardo
- Arthur Rowledge
- Henry Royce
- Arthur Rubbra
- Spirito Mario Viale
See also Rolls-Royce Holdings and Rolls-Royce Heritage Trust