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Armstrong Siddeley Hyena

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1930s British piston aircraft engine

Hyena
Type Radial engine
Manufacturer Armstrong Siddeley
First run 1933
Major applications Armstrong Whitworth A.W.16

The Armstrong Siddeley Hyena was a British aero engine developed by Armstrong Siddeley. Designed in the 1930s, it was an unusual experimental radial engine with inline cylinder banks. It was flown using an Armstrong Whitworth A.W.16 fighter aircraft as a test bed. Unresolved problems with cooling of the rear cylinders prevented the engine from going into production. Few details of this engine survive as company records were lost.

Armstrong Siddeley in-line radial engines

The Hyena arrangement of cylinder banks arranged as a radial engine was continued with further designs, but with little commercial success, with only the Deerhound and Hyena being built.

Hyena
15 cylinders (5 banks of 3 cyl.)
Terrier
14 cylinders (7 banks of 2 cyl.)
Deerhound
21 cylinders (7 banks of 3 cyl.)
Wolfhound
28 cylinders (7 banks of 4 cyl.)
Boarhound
24 cylinders (6 banks of 4 cyl.)
Mastiff
36 cylinders (9 banks of 4 cyl.)

Specifications (Hyena)

Data from Lumsden.

General characteristics

  • Type: 15-cylinder 3-row radial engine with inline banks.
  • Bore: 5.3 in (137 mm)
  • Stroke: 4.88 in (125 mm)
  • Displacement: 1,615.58 cu in (26.6 L)

Components

Performance

  • Power output: 618 hp at 2,000 rpm at sea level

See also

Comparable engines

Related lists

References

Notes

  1. ^ Gunston, Bill (1986). World Encyclopedia of Aero Engines. Guild Publishing. p. 18. 3-row radials
  2. Pearce, William. "Armstrong Siddeley 'Dog' Aircraft Engines". oldmachinepress.com. Retrieved 9 May 2016.
  3. ^ Lumsden 2003, p.76.

Bibliography

  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
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