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Shvetsov ASh-82

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The Shvetsov ASh-82 (M-82) is an air-cooled radial piston engine developed from Shvetsov M-62, itself a licensed version of the Wright R-1820 Cyclone. It entered production in 1940 and saw service in a number of Soviet aircraft. It powered Tupolev Tu-2 and Pe-8 bombers and when the inline engine-powered LaGG-3 was adopted for ASh-82, the famous Lavochkin La-5 and Lavochkin La-7 fighters were created. Over 70,000 ASh-82 were built.

Variants

  • ASh-82F (M-82F) - identical to ASh-82 except for the improved cooling and lubrication which allowed unlimited operation at takeoff power.
  • ASh-82FN (M-82FN) - ASh-82F with fuel injection, power output increased to 1,380 kW (1,850 hp) for takeoff with only a 30 kg (65 lb) increase in engine weight, used by Pe-8 long-range bombers.
  • ASh-21 - a single-row 7-cylinder version of ASh-82 for Yakovlev Yak-11 trainer, entered production in 1946.

Specifications (ASh-82)

General characteristics

Components

  • Cooling system: Air-cooled

Performance

  • Power output:
  • 1,268 kW (1,700 hp) at 2,600 rpm takeoff power
  • 1,140 kW (1,530 hp) at 2,400 rpm at 1,550 m (5,085 ft)
  • 992 kW (1,330 hp) at 2,400 rpm at 4,550 m (14,900 ft)
  • Specific power: 30.8 kW/L (0.68 hp/in³)
  • Compression ratio: 7.05:1
  • Specific fuel consumption:
  • 0.381 kg/(hp·h) (0.627 lb/(hp·h)) at nominal ground power
  • 0.435 kg/(kW·h) (0.715 lb/(hp·h)) at takeoff power
  • Power-to-weight ratio: 1.46 kW/kg (0.89 hp/lb)

Specifications (ASh-21)

General characteristics

Components

  • Cooling system: Air-cooled

Performance

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