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Rolls-Royce Hawk

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Hawk
Type

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Manufacturer

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First run

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Major applications

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Number built

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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

Performance

See also

Comparable engines
Related lists

References

Notes

  1. ^ Pugh 2001, p.78.
  2. ^ Lumsden 2003, p.187.

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.
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External links