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Airforce Museum Berlin-Gatow 313.JPG
Lyulka AL-21F3 engine, Airforce Museum of the Bundeswehr; Berlin-Gatow

The Lyulka AL-21 is an axial flow turbojet engine created by the Soviet Design Bureau named for its chief designer Arkhip Mikhailovich Lyulka.

Design and developmentEdit

The AL-21 entered service in the early 1960s. With later marks AL-21F3 it was used in the Sukhoi Su-17, Sukhoi Su-24, early Mikoyan-Gurevich MiG-23, and Sukhoi T-10 (Sukhoi Su-27 prototype). A non-afterburning version powered the Yakovlev Yak-38 VTOL fighter.

Specifications (AL-21F3)Edit

General characteristics
  • Type: Afterburning turbojet
  • Length: 5,300 mm (209 in)
  • Diameter: 1,000 mm (39 in)
  • Dry weight: 1,700 kg (3,740 lb)
  • Maximum thrust:
  • 76.4 kN (17,175 lbf) dry
  • 109.8 kN (24,675 lbf) with afterburner
  • Overall pressure ratio: 14.75:1
  • Turbine inlet temperature: 1,100 °C (2,000 °F)
  • Specific fuel consumption:
  • 77.5 kg/(h·kN) (0.76 lb/(h·lbf)) at idle
  • 87.7 kg/(h·kN) (0.86 lb/(h·lbf)) at maximum military power
  • 189.7 kg/(h·kN) (1.86 lb/(h·lbf)) with afterburner
  • Thrust-to-weight ratio: 64.7 N/kg (6.6:1)</li>
  • Life expectancy: 1,800 hours


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