Armstrong Siddeley Heritage Trust
Armstrong Siddeley Serval Aero-Engine
The Serval was a ten-cylinder, two-row, air-cooled radial popet-valve aero-engine. It was a development of the Mogoose engine and was initially called the Double Mongoose. It was used to power the Armstrong Whitworth Atalanta airliner and the Saro seaplane.
Leading Particulars of Serval Engines
Engine Type 10-cylinder, two-row, radial, air-cooled, poppet-valve engine
Bore 5.0 inch (127 mm)
Stroke 5.5 inch (139.7 mm)
Volume 1080 cu. in. (17.7 litre)
Mk I
1931 340 hp (251.1kW) Engine speed fan. Compression ratio 5.0:1
Mk III, IIB & IV
1932 310 hp (228 kW) Engine speed fan. Compression ratio 5.0:1
Mk V
1933 340 hp (250.1kW) Medium Superchrged. Compression ratio 5.15:1