Armstrong Siddeley Heritage Trust
Armstrong Siddeley Mongoose Aero-Engine
The Mongoose was a five-cylinder, single-row, radial, air-cooled, poppet-valve piston engine. The engine featured twin forward-mounted ignition magneto's and enclosed valve rockers, with the cylinders identical to those used in the earlier Jaguar engine.
The engine was unusual in appearance for a small radial engine, seeming to be upside down, with the fifth cylinder at the bottom of the circle.
Built in several variants between 1926 and 1930 with a power output that ranged between 135 and 155 hp (100-115 kW).
Images of the Armstrong Siddeley Modgoose Aero-Engine
Images of Aircraft Powered by Armstrong Siddeley Mongoose Aero-Engines
Avro Gosport
Fokker S4
Parnell Peto Mongoose I
Handley Page Gugnunc
Handley Page Gugnunc
Svenska Aero A-B Falken
Leading Particulars of Mogoose Engines
Engine Type 5-cylinder, single-row air-cooled, radial aero-engine
Size Bore/Stroke 5 x 5.5 inch. (127 x 139.7 mm). Volume 540 cu. in. (8.9 litre)
Variants
MK I
1926 135hp (100.7 kW) Direct Drive, Plain Fan
Mk II
1930 155 hp (115.6 kW) Direct Drive, Plain Fan
Mk III
No details available
Mk IIIA
1929 155 hp (115.6 kW) Direct Drive, Plain Fan. Developed for civil aircraft
Mk IIIC
1929 Military version of IIIA
Credit David Ilott
Credit Shaun Connor
Credit Tom Cole