The Armstrong Siddeley Genet Major is a British five-cylinder (later seven-cylinder), air-cooled, radial engine for aircraft, designed and built by Armstrong Siddeley and first run in 1928. It developed 140 horsepower (104 kW). In Royal Air Force use the seven-cylinder version was known as the Civet I. The Feliform names used are in line with company convention, the Genet and Civet[1] both being large cat-like carnivores.
The Genet Major 1 was a five-cylinder engine of 105hp that was closely related to the Genet I but with increased bore and stroke.
The Genet Major 1A (or Civet I in RAF service) was a seven-cylinder development of the Genet Major I, nominally rated at 145hp.
As Genet Major IA but with cylinders using cast rocker boxes.
A geared propeller drive version of the Genet Major IA, 160hp.
An Armstrong Siddeley Genet Major powers Southern Martlet (G-AAYX) which is owned and operated by the Shuttleworth Collection at Old Warden and flies at home air displays throughout the summer months.[2] An Armstrong Siddeley Genet Major 1A engine also powers the only surviving Civilian Aircraft Co.Ltd. 1931 vintage Civilian Coupe 02 monoplane (G-ABNT), which is airworthy and owned and operated by Shipping and Airlines Ltd based at Biggin Hill Airport, England.