The Clerget 9B was a 9-cylinder rotary engine producing around 130 hp (97 kW). Introduced in 1914, it became one of the most widely used Allied rotary engines during World War I, known for its reliability and smooth operation.

Aircraft powered by the Clerget 9B

• Sopwith Camel – early-production versions often used the 9B before later models adopted the 9BF.
• Sopwith Pup – some variants fitted with the 9B for training and experimental purposes.
• Sopwith Triplane – early production models powered by 9B before moving to 9BF.
• Other experimental or training aircraft – occasionally used in small-scale projects or prototypes.

Historical significance

The Clerget 9B helped establish the foundation for late-war Allied fighter performance, powering many of the nimble single-seat scouts that contributed to regaining air superiority during 1916–1917.{{freeshipping_code_1}}{{payment}}