Armstrong Siddeley Mongoose

Armstrong Siddeley Mongoose in a Hawker Tomtit from the Shuttleworth Collection .

The Armstrong Siddeley Mongoose is an aircraft engine that the British manufacturer Armstrong Siddeley built from 1926. The 5-cylinder radial engine has a displacement of 8849 cm³ and has a maximum output of 155 bhp (115 kW). Among other things, the engine was used in the Hawker Tomtit training aircraft and in the Parnall Peto seaplane .

construction and development

The Mongoose is a single-row, air-cooled 5-cylinder radial engine. The engine has dual front-mounted magnetos and overhead valves with encapsulated valve trains. Its cylinders correspond to those of the older Jaguar model . A notable detail of the Mongoose is the vertical position of the lower cylinder, a construction that was believed to have damaged the spark plugs from dripping oil.

The Mongoose was built in different variants. Its output varies from 135 bhp (100 kW) to 155 bhp (115 kW).

variants

Mongoose I: 1926, 135 bhp (100 kW).
Mongoose II: 1930, 155 bhp (115 kW).
Mongoose III: 1929.
Mongoose IIIA: 1929, only for civil aircraft.
Mongoose IIIC: 1929, military version of the Mongoose IIIA.

Aircraft with Armstrong Siddeley Mongoose

Hawker Tomtit with Mongoose engine

Surviving engines

An Armstrong Siddeley Mongoose IIIC drives the only still airworthy Hawker Tomtit , K1786 / G-AFTA , of the Shuttleworth Collection . This aircraft is flown regularly during the summer months.

Data (Mongoose I)

General

Single-row 5-cylinder radial engine, air-cooled
Bore: 127 mm
Stroke: 139.7 mm
Displacement: 8849 cm³
Length: 930 mm
Diameter: 1158 mm
Weight: 154 kg

Components

Valve train: Two overhead valves per cylinder
Mixture preparation: carburettor
Fuel: gasoline , 77 octane
Cooling: air
Reduction gear: no

power

Power: 138 bhp (103 kW) at 1750 rpm. at a height of 0 m
Output per liter: 11.64 kW / l
Compression: 5: 1
Power-to-weight ratio : 1.495 kg / kW

Individual evidence

^ Bill Gunston: World Encyclopedia of Aero Engines . Patrick Stephens, Cambridge 1989. ISBN 1-85260-163-9 . P. 18.
^ ^A ^b Alec Lumsden: British Piston Engines and their Aircraft . Airlife Publishing, Marlborough, Wiltshire 2003. ISBN 1-85310-294-6 . P. 61.
^ The Shuttleworth Collection - Hawker Tomtit . Retrieved February 22, 2012.
^ Alec Lumsden: British Piston Engines and their Aircraft . Airlife Publishing, Marlborough, Wiltshire 2003. ISBN 1-85310-294-6 . Appendix 4: Engine Performance Figures .

literature

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

Web links

Commons : Armstrong Siddeley Mongoose - Collection of images, videos and audio files

Armstrong Siddeley Mongoose . Flight Magazine (July 1929)

[Gunston-1] Bill Gunston: World Encyclopedia of Aero Engines . Patrick Stephens, Cambridge 1989. ISBN 1-85260-163-9 . P. 18.

[Lumsden-2] A ^b Alec Lumsden: British Piston Engines and their Aircraft . Airlife Publishing, Marlborough, Wiltshire 2003. ISBN 1-85310-294-6 . P. 61.

[Shuttleworth-3] The Shuttleworth Collection - Hawker Tomtit . Retrieved February 22, 2012.

[Lumsden4-4] Alec Lumsden: British Piston Engines and their Aircraft . Airlife Publishing, Marlborough, Wiltshire 2003. ISBN 1-85310-294-6 . Appendix 4: Engine Performance Figures .