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
Rolls-Royce Buzzard at the National Air and Space Museum
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)
Rear view

Data from Lumsden[2]

General characteristics
  • Type: Liquid-cooled V12 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

Performance

See also

Related development

Comparable engines

Related lists

References

Notes
  1. Rubbra 1990, p. 59.
  2. Lumsden 2003, p.198.

Bibliography
  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
  • Rubbra, A.A.Rolls-Royce Piston Aero Engines - A Designer Remembers. Rolls-Royce Heritage Trust. Historical Series no 16. 1990. ISBN 1-872922-00-7]
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