Armstrong Siddeley Genet


The Armstrong Siddeley Genet was a five-cylinder, air-cooled, radial engine for aircraft use built in the UK, first run in 1926. It developed 80 hp at 2,200 rpm in its final form and was a popular light aircraft powerplant. Following the company tradition with a slight deviation the engine was named after the Genet, a catlike animal of the same order but different family.[1]

Preserved Armstrong Siddeley Genet at the Shuttleworth Collection
Type Radial engine
National origin United Kingdom
Manufacturer Armstrong Siddeley
First run 1926
Developed into Armstrong Siddeley Genet Major

Variants and applicationsEdit

Genet IEdit

Genet I producing 65 hp.

Genet IIEdit

The Genet II produced 80 hp due to an increased compression ratio of 5.25:1.[2]

Genet IIAEdit

Also 80 hp and with minor differences to the Mark I.

Engines on displayEdit

Two preserved Armstrong Siddeley Genets are on static display at the Shuttleworth Collection, Old Warden, Bedfordshire.

A preserved Genet is on display at the Australian National Aviation Museum, Moorabbin, Victoria, Australia

There is a restored Genet at the New England Air Museum, Bradley Int'l Airport, Windsor Locks, CT.

A Genet is on display at the Aviation Heritage Museum (Western Australia).[3]

Specifications (Genet I)Edit

Data from Lumsden.[4]

General characteristics

  • Type: 5-cylinder single-row radial
  • Bore: 4 in (101.6 mm)
  • Stroke: 4 in (101.6 mm)
  • Displacement: 251.43 cu in (4.1 L)
  • Length: 28.5 in (724 mm)
  • Diameter: 34 in (863.6 mm)
  • Dry weight: 168 lb (76 kg)



See alsoEdit

Related development

Comparable engines

Related lists



  1. ^ Sanderson, Living Mammals of The World, NY, c.1967
  2. ^ Lumsden 2003, p.69.
  3. ^ "Aviation Heritage Museum | Bull Creek, Perth".
  4. ^ Lumsden 2003, p.68


  • Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 18. ISBN 0-7509-4479-X.
  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.

External linksEdit

  • Armstrong Siddeley Genet at the Australian National Aviation Museum
  • "Armstrong Siddeley Genet". Flight. No. 26 August 1926. pp. 531–2.