Armstrong Siddeley Ounce

The Armstrong Siddeley Ounce was a small two-cylinder aero engine developed by Armstrong Siddeley in 1920. 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

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