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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.[1] 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.[2] Few details of this engine survive as company records were lost.[3]

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

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.[3]

General characteristics

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

Components

• Valvetrain: Overhead poppet valves
• Supercharger: Medium supercharged
• Fuel type: 77 Octane petrol
• Cooling system: Air-cooled
• Reduction gear: Epicyclic geared, left hand tractor

Performance

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

See also

Comparable engines

• Armstrong Siddeley Deerhound
• BMW 803
• Curtiss H-1640
• Daimler-Benz DB 604
• Dobrynin VD-4K
• Junkers Jumo 222
• Lycoming R-7755
• Wright R-2160 Tornado

Related lists

• List of aircraft engines

References

Notes

Bibliography

На других языках

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[de] Armstrong Siddeley Hyena

Armstrong Siddeley Hyena war die Bezeichnung eines Kolbenflugmotors des britischen Herstellers Armstrong Siddeley, der für die Verwendung in der militärischen und der zivilen Luftfahrt bestimmt war.

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- [en] Armstrong Siddeley Hyena

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[it] Armstrong Siddeley Hyena

L'Armstrong Siddeley Hyena era un motore aeronautico radiale a 15 cilindri tripla stella raffreddato ad aria sviluppato dall'azienda britannica Armstrong Siddeley negli anni trenta e rimasto allo stadio di prototipo.

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[ru] Armstrong Siddeley Hyena

Armstrong Siddeley Hyena — британский авиационный трёхрядный 15-цилиндровый звездообразный двигатель, разработанный в 1930-х годах. Особенностью его конструкции было размещение цилиндров в нескольких продольных блоках, а не более привычным способом, в дополнительных "звёздах".[1] Для лётных испытаний использовался истребитель Armstrong Whitworth A.W.16. Имевшиеся проблемы с охлаждением заднего ряда цилиндров помешали серийному выпуску мотора.[3] Информации об этом двигателе почти не сохранилось, в связи с утратой архивов компании.[2]

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