Lyulka AL-21

AL-21
Lyulka AL-21F3 engine, Airforce Museum of the Bundeswehr; Berlin-Gatow
Type	Turbojet
Manufacturer	Lyulka
Major applications	Sukhoi Su-17 Sukhoi Su-24 Yakovlev Yak-38

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 development

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)

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)

Components

• Compressor: 14-stage axial compressor with variable stator blades

Performance

• 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)
• Life expectancy: 1,800 hours

See also

Related lists

• List of aircraft engines

References

Wikimedia Commons has media related to Ljulka AL-21.

• Page of the engine at Russian Aircraft Encyclopedia