Rolls-Royce Pennine
| Pennine | |
|---|---|
 | |
| Type | X-24 air-cooled sleeve-valve piston aero-engine |
| Manufacturer | Rolls-Royce Limited |
| First run | 1945 |
| Major applications | Not flown |
| 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the 22-litre Exe; a prototype engine was built and tested, but never flew.[1] The project was terminated in 1945, being superseded by the jet engine.[2]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, 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 Mount Snowdon.
Specifications (Pennine)
General characteristics
- Type: 24-cylinder supercharged liquid-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
- Comparable engines
- Related lists
References
Notes
- ↑ Rubbra 1990, p.148.
- ↑ Gunston 1989, p.142.
- ↑ "Rolls-Royce and the Sleeve Valve" (PDF). New Zealand Rolls-Royce and Bentley Club (07-3): 8–15. 2007. Archived from the original (PDF) on 2010-12-06.
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
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