Armstrong Siddeley Cougar
The Armstrong Siddeley Cougar was an aero engine developed by Armstrong Siddeley in 1945. The design was a departure from earlier Armstrong Siddeley engines in many ways, it was the company's only nine-cylinder radial design. Although the engine was tested it did not find an aircraft application and was not produced.
| Cougar | |
|---|---|
 | |
| Type | Radial engine |
| National origin | United Kingdom |
| Manufacturer | Armstrong Siddeley |
| First run | 1945 |
Specifications (Cougar)
Data from Flightglobal Archive.[1][2]
General characteristics
- Type: 9-cylinder single-row air-cooled radial engine
- Bore: 5.5 in (140 mm)
- Stroke: 5.5 in (140 mm)
- Displacement: 1,176 cu in (19 L)
- Length: 51.5 in (1,308 mm)
- Diameter: 49.5 in (1,257 mm)
- Dry weight: 1,020 lb (463 kg)
Components
- Valvetrain: Overhead valve operated by pushrods
- Supercharger: 1 stage gear driven 8.17:1 supercharger
- Fuel system: R.A.E.-Hobson AS/C2 fuel injection to supercharger with automatic boost control
- Fuel type: 100/130 aviation petrol
- Oil system: Pressure fed at 80 psi (5.5 bar), dry sump.
- Cooling system: Air-cooled
Performance
- Power output:
- (Take-off) 850 hp (634 kW) at 2,800 rpm at 46.0 inHg / +8.0Lb boost for 15 minutes
- (Maximum) 730 hp (544 kW) at 2,700 rpm at 7,500 ft (2,290 m)
- (Normal) 690 hp (515 kW) at 2,500 rpm at 6,000 ft (1,830 m)
- (Cruising) 500 hp (373 kW) at 2,300 pm at 10,500 ft (3,200 m)
- Specific power: 0.76 hp/(cu in) (34.6 kW/L)
- Compression ratio: 6.3:1
- Specific fuel consumption: 0.46 lb/(hp h) (0.011 kg/(kW h))
- Oil consumption: 0.012 lb/(hp h) (0.005 kg/(kW h))
- Power-to-weight ratio: 0.83 hp/lb (1.37 kW/kg)
References
- Flightglobal archive - January 1946 Retrieved: 19 December 2008
- Wilkinson, Paul H. (1946). Aircraft Engines of the World. London: Sir isaac Pitman & Sons Ltd.
Further reading
- Bridgman, Leonard, ed. (1947). Jane's all the World's Aircraft 1947. London: Sampson Low, Marston & Co. pp. 14d–15d.
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