Armstrong Siddeley Ounce

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The Armstrong Siddeley Ounce is an aircraft engine that the British manufacturer Armstrong Siddeley built from 1920. The 2-cylinder boxer engine had a displacement of 3212 cm³. This engine was only supposed to be used for testing purposes, but it ran so well that it was mass-produced. It was used to drive early ultralight aircraft and target display drones . The Ounce used two cylinders from the Jaguar I radial engine that was built earlier .

Aircraft with Armstrong Siddeley Ounce

Data (ounce)

General

  • 2-cylinder boxer engine, air-cooled, with supercharging
  • Bore: 127 mm
  • Stroke: 127 mm
  • Displacement: 3212 cm³
  • Length: 521 mm
  • Width: 1003 mm
  • Height: 622 mm
  • Weight: 77 kg

Components

  • Valve train: Two overhead valves per cylinder
  • Mixture preparation: carburettor
  • Cooling: air
  • Reduction gear: no

power

  • Power: 45 bhp (33.5 kW) at 1500 rpm at sea level
  • Output per liter: 10.43 kW / L
  • Compression: 5: 1
  • Power-to-weight ratio : 2.3 kg / kW

Individual evidence

  1. ^ Bill Gunston: World Encyclopedia of Aero Engines . Patrick Stephens, Cambridge 1989. ISBN 1-85260-163-9 . P. 18.
  2. ^ Alec Lumsden: British Piston Engines and their Aircraft . Airlife Publishing, Marlborough, Wiltshire 2003. ISBN 1-85310-294-6 . P. 66.

literature

  • Alec Lumsdem: British Piston Engines and their Aircraft . Airlife Publishing, Marlborough 2003. ISBN 1-85310-294-6 .
  • Bill Gunston: World Encyclopedia of Aero Engines . Patrick Stephens, Wellingborough 1986. ISBN 0-7509-4479-X . P. 18.

Web links

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