Soloviev D-20

The Soloviev D-20P was a low-bypass turbofan engine rated at 52.9 kN (11,900 lbf) thrust. It was built by the Soloviev Design Bureau, the world's first turbofan for use on the transport aircraft. The engine was used on the Tupolev Tu-124. A later derivative with increased bypass ratio, the D-20P-125, was developed into the Soloviev D-30 family of low and medium bypass engines.[1]

Left side view of the Soloviev D-20 engine
Type Turbofan
Manufacturer Soloviev Design Bureau
Major applications Tupolev Tu-124


Data from Aircraft engines of the World 1970[2]

General characteristics

  • Type: Twin-spool turbofan engine
  • Length: 3,304 mm (130.1 in)
  • Diameter: 976 mm (38.4 in)
  • Frontal area: 0.74 m2 (8 sq ft)
  • Dry weight: 1,450 kg (3,200 lb)


  • Compressor: Three-stage LP, eight-stage HP, axial flow
  • Combustors: Cannular with 12 flame tubes
  • Turbine: Two-stage LP turbine, single-stage HP turbine
  • Fuel type: Aviation Kerosene, Jet A, Jet A-1, JP-1
  • Oil system: Pressure spray at 3.9 bar (57 psi)


  • Fan pressure ratio: 2.6:1
  • HP pressure ratio: 13.6:1
  • Fan mass airflow: 113 kg/s (250 lb/s) at 8,550 LP rpm
  • HP mass airflow: 56.5 kg/s (125 lb/s) at 11,7000 HP rpm
  • S.f.c. cruise: 73 kg/kN/h (0.72 lb/lbf/h)
  • S.f.c. take-off: 92 kg/kN/h (0.9 lb/lbf/h)

See also

Related lists


  1. Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2nd ed.). Cambridge, England: Patrick Stephens Limited. p. 164. ISBN 978-1-85260-163-8.
  2. Wilkinson, Paul H. (1970). Aircraft engines of the World 1970 (22nd ed.). London: Paul H. Wilkinson. p. 223.

Further reading

  • Taylor, John W.R., ed. (1972). Jane's all the World's Aircraft 1972–73. London: Sampson Low, Marston & Co. Ltd. p. 751. ISBN 978-0354001090.
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