The Clerget 9B is a nine-cylinder rotary aircraft engine of the

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

era designed by Pierre Clerget. Manufactured in both France and Great Britain (

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), it was used on such aircraft as the Sopwith Camel. The Clerget 9Bf was an increased

stroke Stroke is a medical condition in which poor cerebral circulation, blood flow to a part of the brain causes cell death. There are two main types of stroke: brain ischemia, ischemic, due to lack of blood flow, and intracranial hemorrhage, hemor ...

version.Lumsden 2003, p. 133.

Variants

;Clerget 9B (1913) 130 hp (97 kW). 1,300 produced by Ruston Proctor & Co Ltd of Lincoln ;Clerget 9Bf (1915) 140 hp (104 kW). Extended stroke 172 mm (6.75 in) version, increasing capacity to 17.5 L (1,066.5 cu in). 1,750 produced by

and 600 produced by Ruston Proctor.

Applications

Clerget 9B

* Armstrong Whitworth F.K.10 * Avro 504 * Avro 531 * Bristol M.1 * Cierva C.6 * Cierva C.8 * Fairey Hamble Baby * FBA Type C * Nieuport 12 * Nieuport 17bis * Sopwith Baby * Sopwith Camel * Sopwith Scooter * Sopwith Triplane * Sopwith 1½ Strutter

Clerget 9Bf

* Sopwith Camel

Engines on display

*A preserved Clerget 9B engine is on public display at the

Fleet Air Arm Museum The Fleet Air Arm Museum is devoted to the history of British naval aviation. It has an extensive collection of military and civilian aircraft, aero engines, models of aircraft and Royal Navy ships (especially aircraft carriers), and paintings ...

, RNAS Yeovilton. *A Clerget 9Bf engine is on display at the Powerhouse Museum,

Sydney Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Syd ...

. * A Clerget 9B is on display at the Pima Air & Space Museum in Arizona.

Operational (Airworthy) Rotary Engines

The Shuttleworth Collection based at Old Warden Aerodrome, UK, operate an airworthy late production Sopwith Triplane ''(G-BOCK)'' fitted with an original 9B as well as an airworthy late production Sopwith Camel ''(G-BZSC)''The Shuttleworth Collection - Sopwith Camel
Retrieved: 21 August 2018 fitted with an original long-stroke 9Bf. These aircraft can be seen displaying at home air displays through the summer months.

Specifications (Clerget 9B)

References

Notes

Bibliography

* Gunston, Bill. ''World Encyclopaedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. * Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. . * {{Clerget aeroengines Air-cooled aircraft piston engines 1910s aircraft piston engines 9B Rotary aircraft piston engines