Armstrong Siddeley Genet

The Armstrong Siddeley Genet is 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]

Genet
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 applications

Genet I

Genet I producing 65 hp.

• Avro 618 Ten
• Avro Avian prototype
• Blackburn Bluebird I
• BFW M.23
• Cierva autogyros. C.9 and C.10
• Drzewiecki JD-2
• Fleet Fawn
• Junkers A50 Junior
• Medwecki and Nowakowski M.N.5
• Saro Cutty Sark
• Southern Martlet
• Westland-Hill Pterodactyl

Genet II

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

• ANEC IV
• Avro Avian
• Blackburn Bluebird II
• Cierva C.19 autogyro
• Darmstadt D-18
• de Havilland DH.60 Moth
• Fairchild 21
• Klemm Kl 25
• Nicholas-Beazley NB-8G
• Parnall Imp
• Robinson Redwing II
• Southern Martlet
• Westland Widgeon

Genet IIA

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

• Robinson Redwing II

Engines on display

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)

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)

Components

• Valvetrain: Overhead poppet valves
• Cooling system: Air-cooled
• Reduction gear: Direct drive, Left hand tractor

Performance

• Power output: 65 hp at 1,800 rpm
• Compression ratio: 5.2:1
• Power-to-weight ratio: 0.38 hp/lb

See also

Related development

• Armstrong Siddeley Genet Major

Comparable engines

• BMW X
• Warner Scarab Junior

Related lists

• List of aircraft engines

References

Notes

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

Bibliography

• 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 links

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