Armstrong Siddeley Ounce
{{Short description|1920s British piston aircraft engine}}
{{Use dmy dates|date=August 2017}}
{{Use British English|date=August 2017}}
| {{Infobox Aircraft Begin
|name = Ounce |image = File:Unmanned aerial target (mark II) engine RAE-O1058.jpg |caption = }} {{Infobox Aircraft Engine |type=Piston engine |manufacturer=Armstrong Siddeley |national origin=United Kingdom |first run=1920 |major applications= |number built = |program cost = |unit cost = |developed from = |developed into = |variants with their own articles = }} |
The Armstrong Siddeley Ounce was a small two-cylinder aero engine developed by Armstrong Siddeley in 1920.Gunston 1989, p.18. The engine was originally conceived as a test piece but ran very well and was put into production for early ultralight aircraft and use in target drones. The Ounce used two cylinders from the preceding Jaguar I radial engine.
Applications
Specifications (Ounce)
{{pistonspecs
|
|ref=Lumsden.Lumsden 2003, p.66.
|type=Two cylinder, horizontally-opposed air cooled piston engine
|bore=5.0 in (127 mm)
|stroke=5.0 in (127 mm)
|displacement=196 cu in (3.2 L)
|length=20.5 in (521 mm)
|diameter=
|width=39.5 in (1003 mm)
|height=24.5 in (622 mm)
|weight= 170 lb (77 kg)
|valvetrain=Overhead valve
|supercharger=
|turbocharger=
|fuelsystem=Carburettor
|fueltype=
|oilsystem=
|coolingsystem=Air cooled
|power=45 hp (33.5 kW) at 1,500 rpm
|specpower=
|compression=5:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight= 0.26 hp/lb (0.43 kW/kg)
}}
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}}
External links
{{Commons category|Armstrong Siddeley Ounce}}
- [http://www.powerhousemuseum.com/collection/database/?irn=207806 AS Ounce information and images at the Power House Museum, Sydney, Australia]
{{ASaeroengines}}