The Armstrong Siddeley Hyena was a British aero engine developed by
Armstrong Siddeley
Armstrong Siddeley was a British engineering group that operated during the first half of the 20th century. It was formed in 1919 and is best known for the production of luxury vehicles and aircraft engines.
The company was created following t ...
. 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.
[Lumsden 2003, p.76.]
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)
See also
References
Notes
Bibliography
* Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. .
{{Armstrong Siddeley aeroengines
Hyena
Hyenas, or hyaenas (from Ancient Greek , ), are feliform carnivoran mammals of the family Hyaenidae . With only four extant species (each in its own genus), it is the fifth-smallest family in the Carnivora and one of the smallest in the cl ...
Inline radial engines
1930s aircraft piston engines
Aircraft air-cooled inline piston engines