The Armstrong Siddeley Ounce was a small two-cylinder aero engine developed by

Armstrong Siddeley Armstrong Siddeley was a British engineering group that operated during the first half of the 20th century. It was formed in 1919 and is best known for the production of luxury vehicles and aircraft engines. The company was created following t ...

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 drone A target drone is an unmanned aerial vehicle, generally remote controlled, usually used in the training of anti-aircraft crews. One of the earliest drones was the British DH.82 Queen Bee, a variant of the Tiger Moth trainer aircraft operational ...

s. The Ounce used two cylinders from the preceding Jaguar I

radial engine The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is ...

Applications

* Bristol Babe * 1920 redesigns of the '1917 Type Aerial Target'

Specifications (Ounce)

References

Notes

Bibliography

*Gunston, Bill. ''World Encyclopedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. *Lumsden, Alec. ''British Piston Engines and their Aircraft''. Marlborough, Wiltshire: Airlife Publishing, 2003. .

External links

AS Ounce information and images at the Power House Museum, Sydney, Australia
{{ASaeroengines

Ounce The ounce () is any of several different units of mass, weight or volume and is derived almost unchanged from the , an Ancient Roman unit of measurement. The avoirdupois ounce (exactly ) is avoirdupois pound; this is the United States customa ...