Shvetsov ASh-2

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Type Radial engine
National origin Soviet Union
Manufacturer Shvetsov OKB-19 in Perm'
First run 1946
Developed from Shvetsov ASh-82

The Shvetsov ASh-2 was a 28-cylinder, air-cooled, radial aircraft engine designed in the Soviet Union in the late 1940s. It was inferior to the Dobrynin VD-4K engine and did not enter production. One of the problems was air-cooling which ate up to 50% of the total engine power at 15000 meters. In contrast, liquid-cooled VD-4K required only 5% of power for cooling at the same altitude.

Specifications (ASh-2)[edit]

Data from Kotelnikov, p. 252

General characteristics

  • Type: 28-cylinder, 4-row radial engine
  • Bore: 155.5 mm (6.122 in)
  • Stroke: 155.0 mm (6.102 in)
  • Displacement: 82.4 L (5,028 cu in)
  • Dry weight: 1,850 kg (4,078 lbs)


  • Supercharger: single-stage, single-speed geared supercharger
  • Cooling system: Air-cooled


  • Power output: 3,500 horsepower (2,600 kW)




  • Kotelnikov, Vladimir (2005). Russian Piston Aero Engines. Ramsbury, Marlborough: Crowood Press. ISBN 1-86126-702-9.