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Shvetsov ASh 21

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The Shvetsov ASh-21 is a seven-cylinder single-row air-cooled radial aero engine.

Contents

Design and development

The ASh-21 is basically a single-row version of the Shvetsov ASh-82. The ASh-21 also incorporates a number of parts from the ASh-62 radial engine. Design began in 1945, and by 1947 testing had finished and production had begun. Between 1947 and 1955 7,636 ASh-21 engines had been built in the USSR and beginning in 1952 it was produced in Czechoslovakia as the M-21.

Applications

  • Yak-11
  • Yak-16
  • Beriev Be-8
  • Beriev Be-30 (prototype)

    • General characteristics

  • Type: seven-cylinder, air-cooled, single-row, radial engine
  • Bore: 155.5mm (6.12in)
  • Stroke: 155mm (6.10in)
  • Displacement: 20.6 Liters (1,257 cu in)
  • Dry weight: 487kg (1,074lb)

    • Components

  • Supercharger: Single stage, single speed, geared centrifugal supercharger
  • Fuel system: Carburetor
  • Cooling system: Air

    • Performance

  • Power output:
  • 520 kW (700 hp) at 2,300 rpm takeoff power
  • 459 kW (615 hp) at 1,700 m (5,580 ft)
  • Specific power: 25.5 kW/L (0.56 hp/in³)
  • Compression ratio: 6.4:1
  • Power-to-weight ratio: 1.07 kW/kg (0.65 hp/lb)

    • References

    Shvetsov ASh-21 Wikipedia
    (Text) CC BY-SA