Rolls-Royce Buzzard
The Rolls-Royce Buzzard was a British piston aero engine of 36.7 litres (2,240 cubic inches) capacity that produced about 800 horsepower (600 kW). Designed and built by Rolls-Royce Limited it is a V12 engine of 6 in (150 mm) Bore and 6.6 in (170 mm) Stroke. Only 100 were made. A further development was the Rolls-Royce R engine. The Buzzard was developed by scaling-up the Rolls-Royce Kestrel Engine.[1]
| Buzzard | |
|---|---|
 | |
| Type | Piston V12 engine |
| Manufacturer | Rolls-Royce Limited |
| First run | June 1928 |
| Major applications | Blackburn Iris Mark V Blackburn Perth |
| Number built | 100 |
| Developed from | Rolls-Royce Kestrel |
| Developed into | Rolls-Royce R |
Variants
List from Lumsden.
- Buzzard IMS, (H.XIMS)
- (1927), Maximum power 955 hp (712 kW), nine engines produced at Derby.
- Buzzard IIMS, (H.XIIMS)
- (1932-33), Maximum power 955 hp (712 kW), reduced propeller drive ratio (0.553:1), 69 engines produced at Derby.
- Buzzard IIIMS, (H.XIVMS)
- (1931-33), Maximum power 937 hp (699 kW), further reduced propeller drive ratio (0.477:1), 22 engines produced at Derby.
Applications
The sole Buzzard-powered Vickers Type 207 circa 1933
Specifications (Buzzard IMS)
Data from Lumsden[2]
General characteristics
- Type: Liquid-cooled V12 Aircraft piston engine
- Bore: 6 in (152.4 mm)
- Stroke: 6.6 in (167.6 mm)
- Displacement: 2,239.3 in³ (36.7 L)
- Length: 75.7 in (1,923 mm)
- Width: 30.6 in (777 mm)
- Height: 44.4 in (1,128 mm)
- Dry weight: 1,140 lb (517 kg)
Components
- Valvetrain: Overhead camshaft
- Supercharger: Single-stage supercharger
- Fuel type: 73-77 octane petroleum
- Cooling system: Liquid-cooled
Performance
- Power output: 800 hp (600 kW)
- Specific power: 0.36 hp/in³ (16.3 kW/L)
- Compression ratio: 5.5:1
- Power-to-weight ratio: 0.7 hp/lb
See also
Related development
Comparable engines
Related lists
References
Notes
- Rubbra 1990, p. 59.
- Lumsden 2003, p.198.
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