Armstrong Siddeley Serval
{{Short description|1920s British piston aircraft engine}}
{{Use dmy dates|date=February 2018}}
{{Use British English|date=February 2018}}
| {{Infobox Aircraft Begin
|name = Serval/Double Mongoose |image = ASServal.JPG |caption = }} {{Infobox Aircraft Engine |type=Radial engine |manufacturer=Armstrong Siddeley |national origin=United Kingdom |first run=1928 |major applications=Armstrong Whitworth Atalanta |number built = |program cost = |unit cost = |developed from = |developed into = |variants with their own articles = }} |
The Armstrong Siddeley Serval was a British ten-cylinder aero engine developed by Armstrong Siddeley in the late 1920s. Following company tradition, the engine was named for the serval.
Design and development
The Serval was a ten-cylinder, double-row, air-cooled radial piston engine. It was developed from the Armstrong Siddeley Mongoose and was, more or less, two Mongooses built around a single crankcase; indeed it first appeared as the Double Mongoose in May 1928.Gunston 1989, p.17.
Built in several variants, power output was about 340 hp (254 kW).
Variants
Serval I initially Double Mongoose
:(1931) 340 hp.
;Serval III
:(1932)
;Serval IIIB
:(1932) 310 hp.
;Serval IV
: 310 hp.
;Serval V
:(1933) 340 hp.
Applications
Specifications (Serval I)
{{pistonspecs|
|ref=Lumsden.Lumsden 2003, p.77.
|type=10-cylinder double-row radial
|bore= 5 in (127 mm)
|stroke= 5.5 in (139.7 mm)
|displacement= 1,080 cu in (17.7 L)
|length=54.25 in (1,378 mm)
|diameter=45.6 in (1,158 mm)
|width=
|height=
|weight=714 lb (324 kg)
|valvetrain=Overhead poppet valves
|supercharger=
|turbocharger=
|fuelsystem=
|fueltype=77 Octane petrol
|oilsystem=
|coolingsystem=Air-cooled
|power=340 hp at 2,000 rpm at sea level
|specpower=
|compression=5:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=0.47 hp/lb
|designer=
|reduction_gear=Direct drive, Left hand tractor
|general_other=
|components_other=
|performance_other=
}}
See also
{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
|similar engines=
}}
References
=Notes=
{{reflist}}
=Bibliography=
{{refbegin}}
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}}
- Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. {{ISBN|1-85310-294-6}}.
{{refend}}
{{ASaeroengines}}
Category:1920s aircraft piston engines