Armstrong Siddeley Mongoose

The Armstrong Siddeley Mongoose is a British five-cylinder radial aero engine produced by Armstrong Siddeley. Developed in the mid-1920s it was used in the Hawker Tomtit trainer and Parnall Peto seaplane amongst others. With a displacement of 540 cubic inches (9 litres) the Mongoose had a maximum power output of 155 horsepower (115 kilowatts).

A Mongoose engine powers the sole remaining airworthy Hawker Tomtit, based at Old Warden.

Design and development The Mongoose is a five-cylinder, single-row, air-cooled radial piston engine. The engine features twin forward-mounted ignition magnetos and enclosed valve rockers, the cylinders being the same as those used for the earlier Jaguar engine.Gunston 1989, p. 18. An unusual feature of the Mongoose is the vertical position of the lower cylinder, a design thought likely to promote oil fouling of the spark plugs.Lumsden 2003, p. 69.

Built in several variants, power output ranged between 135 and 155 hp (100-115 kW).

Variants Mongoose I 1926, 135 hp. Mongoose II 1930, 155 hp. Mongoose III 1929. Mongoose IIIA 1929, civil use. Mongoose IIIC 1929, Military use based on IIIA.

Applications

Note:List from Lumsden ANBO III (Second batch, 1931)Ramoška, Gytis, ANBO III. Pirmasis serijinis lietuviškas lėktuvas, Plieno Sparnai, (in Lithuanian) Nr. 7 2002 m. Avro 504N Avro 504R Avro Tutor Avro Type 621 Trainer Handley Page Hamlet Handley Page Gugnunc Hawker Tomtit Parnall Peto Fokker S.IV

Surviving engines An Armstrong Siddeley Mongoose IIIC powers the sole remaining airworthy Hawker Tomtit, K1786/G-AFTA, owned and operated by the Shuttleworth Collection this aircraft flies regularly throughout the summer months.The Shuttleworth Collection - Hawker Tomtit Retrieved: 22 February 2012

Specifications (Mongoose I)

Armstrong Siddeley Mongoose

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