Rolls-Royce Hawk
Hawk | |
---|---|
Preserved Rolls-Royce Hawk | |
Type | Liquid-cooled inline piston engine |
Manufacturer | Rolls-Royce Limited |
First run | 1914 |
Major applications | SSZ class blimp |
Number built | 205 |
The Rolls-Royce Hawk was a British aero engine designed by Rolls-Royce in 1915. Derived from one bank of six cylinders of the Rolls-Royce Eagle, it produced 75 horsepower at 1,370 rpm. Power was progressively increased to 91 hp by February 1916, and 105 hp by October 1918.[1]
After Rolls-Royce made the prototypes, the Hawk was manufactured under licence by Brazil Straker in Bristol between 1915 and 1918. During this period 204 engines were built, and the Hawk earned a reputation for high reliability.
Many engines of this type were used to power the SSZ class coastal patrol airships of which 76 were built.
Applications
Specifications (Hawk I)
Data from Lumsden[2]
General characteristics
- Type: 6-cylinder liquid-cooled inline aircraft piston engine
- Bore: 4 in (101.6 mm)
- Stroke: 6 in (152.4 mm)
- Displacement: 452.3 in³ (7.41 L)
- Length: 46.85 in (1190 mm)
- Width: 23.5 in (597 mm)
- Height: 35.5 in (902 mm)
- Dry weight: 387 lb (175.5 kg)
Components
- Valvetrain: OHC – Overhead camshaft
- Fuel system: Twin Claudel-Hobson FZR carburettors
- Fuel type: Petrol
- Cooling system: Liquid-cooled
Performance
- Power output: 75 hp (56 kW) at 1,350 rpm
- Compression ratio: 5.1:1
- Power-to-weight ratio: 0.2 hp/lb (0.3 kW/kg)
See also
Comparable engines
Related lists
References
Notes
Bibliography
- Flight 7 May 1954
- British Airships
- Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
- Pugh, Peter. The Magic of a Name – The Rolls-Royce Story: The First 40 Years. Duxford, Cambridge: Icon Books, 2001. ISBN 1-84046-151-9.
- Taulbut, Derek S. Eagle – Henry Royce’s First Aero Engine, Rolls-Royce Heritage Trust, 2011. ISBN 978-1-872922-40-9.
External links
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