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The Armstrong Siddeley Lynx is a British seven-cylinder aero engine developed by Armstrong Siddeley. Testing began in 1920 and 6,000 had been produced by 1939. In Italy Alfa Romeo built a 200 horsepower (150 kW) licensed version of this engine named the Alfa Romeo Lynx.[1]

Lynx
Armstrong Siddeley Lynx fitted to the Shuttleworth Collection's airworthy Avro Tutor
Type	Radial aero engine
National origin	United Kingdom
Manufacturer	Armstrong Siddeley
First run	1920
Number built	6,000
Developed from	Armstrong Siddeley Jaguar
Developed into	Armstrong Siddeley Cheetah

Variants

Lynx I

1920, 150 hp (110 kW).

Lynx II

1920, 184 hp (137 kW).

Lynx III

1924, 200 hp (150 kW).

Lynx IV

1929, 180 hp (130 kW).

Lynx IVA

1930, 188 hp (140 kW).

Lynx IVC

1929, 208 / 225 hp (155 / 168 kW).

Lynx IV(G)

1929, Geared propellor drive.

Lynx IV(MOD)

1929, 188 hp (140 kW), reconditioned and modified Lynx IV.

Lynx IV(S)

1928, 200 hp (150 kW), fully supercharged.

Lynx V (Lynx Major)

1930, increased bore and stroke, name changed from Lynx V to Lynx Major then Cheetah. Effectively half a Panther[2]

Piaggio P.II

Licence production in Italy by Piaggio.

Applications

Alfa Romeo Lynx

• Breda Ba.19
• Breda Ba.25
• IMAM Ro.10

Survivors

• Avro Tutor, K3215, powered by a Lynx IV, flies regularly at the Shuttleworth Collection and can be viewed in the museum at other times.[3]

Specifications (Lynx IV)

Data from Lumsden[4]

General characteristics

• Type: 7-cylinder air-cooled radial engine
• Bore: 5.0 in (127 mm )
• Stroke: 5.5 in (140 mm)
• Displacement: 756 cu in (12.4 L)
• Length: 45.6 in (1,158 mm)
• Diameter: 42 in (1,067 mm)
• Dry weight: 525 lb (238 kg )

Components

• Valvetrain: Overhead valve, 2 valves per cylinder
• Fuel system: Carburettor
• Cooling system: Air-cooled

Performance

• Power output: 187 hp (139 kW) at 1,700 rpm cruise / 215 hp (160 kW) at 1,900 rpm max
• Power-to-weight ratio: 0.35 hp/lb (0.6 kW/kg)

See also

Related development

• Armstrong Siddeley Cheetah
• Armstrong Siddeley Jaguar

Comparable engines

• Jacobs R-755
• Siemens-Halske Sh 14
• Walter Castor
• Warner Scarab
• Wright R-760

Related lists

• List of aircraft engines

References

Notes

Bibliography

На других языках

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[de] Armstrong Siddeley Lynx

Der Armstrong Siddeley Lynx war ein Kolbenflugmotor des britischen Herstellers Armstrong Siddeley und für militärische, aber auch zivile Verwendung bestimmt. Der bereits 1920 vorgestellte luftgekühlte Siebenzylinder-OHV-Sternmotor wurde in eine Reihe bekannter britischer Flugzeuge wie die Avro 504N, O, Q und R oder die Airspeed AS.5A Courier eingebaut. Dem Lynx entsprach in Dimensionen und Bauweise auch der zwei Jahre später herausgebrachte 14-Zylinder-Doppelsternmotor Armstrong Siddeley Jaguar.

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- [en] Armstrong Siddeley Lynx

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[fr] Armstrong Siddeley Lynx

L'Armstrong Siddeley Lynx était un moteur d'avion britannique à sept cylindres en étoile, développé par Armstrong Siddeley. Ses tests débutèrent en 1920, et en 1939, 6 000 exemplaires avaient été produits.

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[it] Armstrong Siddeley Lynx

L'Armstrong Siddeley Lynx era un motore radiale aeronautico a 7 cilindri a singola stella prodotto negli anni venti e trenta dalla britannica Armstrong Siddeley.

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[ru] Armstrong Siddeley Lynx

Siddeley Lynx — британский поршневой 7-цилиндровый авиадвигатель воздушного охлаждения, разработанный в 1920 году компанией Armstrong Siddeley. Предназначался для применения как на военных, так и на гражданских самолётах, наиболее известными из которых были Avro 504 (модификаций N, O, Q и R) и Airspeed AS.5A Courier.

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