Armstrong Siddeley Genet Major / Civet
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 and Civet both being large cat-like carnivores.
Armstrong Siddeley Civet
Variants and applications:
Genet Major I
The Genet Major 1 was a five-cylinder engine of 105 horsepower (78 kW) that was closely related to the Genet I but with increased bore and stroke.
Avro 638 Club Cadet
Cierva C.19 Autogiro
Saro Cutty Sark
Genet Major 1A (Civet I)
The Genet Major 1A (or Civet I in RAF service) was a seven-cylinder development of the Genet Major I, nominally rated at 145 horsepower (108 kW).
Cierva C.30A Autogiro
RWD-6 (not specified 7-cylinder Genet Major sub-type)
Saro Cutty Sark
Genet Major III
As Genet Major IA but with cylinders using cast rocker boxes.
Genet Major IV
A geared propeller drive version of the Genet Major IA, 160 horsepower (120 kW).
Genet Major IA / Civet I
Type: 7-cylinder single-row radial piston engine
Bore: 4.25 in (107.95 mm)
Stroke: 4.5 in (114.3 mm)
Displacement: 452.01 cu in (7.3 L)
Length: 38.8 in (985.5 mm)
Diameter: 38.15 in (970 mm)
Dry weight: 327 lb (148 kg)
Valvetrain: Overhead poppet valves
Fuel type: 77 Octane petrol
Cooling system: Air-cooled
Reduction gear: Direct drive, Left hand tractor
Power output: 165 hp (123 kW) at 2,425 rpm at sea level
Compression ratio: 5:1
Power-to-weight ratio: 0.5 hp/lb