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

AL-21
Lyulka AL-21F3 engine, Airforce Museum of the Bundeswehr; Berlin-Gatow
Type	Turbojet
National origin	Russia
Manufacturer	NPO AL , Salyut , Perm PMZ , OMKB , UMPO , MMP Chern
Major applications	Sukhoi Su-17 Sukhoi Su-24

Design and development

The AL-21 is closely similar in technology to the General Electric J79 first flown in 1955, which was the first engine for supersonic flight, using a variable stator.[1]

It is generally described as being in the "third generation" of Soviet gas turbine engines which are characterized by high thrust-to-weight ratios and the use of turbine air cooling.[2]

The AL-21 entered service in the early 1960s. Later designed the AL-21F3, it was used in the Sukhoi Su-17, Sukhoi Su-24, Ground-attack variant Mikoyan-Gurevich MiG-23, and Sukhoi T-10 (Sukhoi Su-27 prototype).

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: Two-spool 14-stage axial compressor with variable stator vanes
• Turbine: Two-stage high pressure, single-stage low pressure

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: 4.6 maximum military power / 6.6 with afterburner
• Life expectancy: 1,800 hours

See also

• General Electric J79

Related lists

• List of aircraft engines

References

External links

Wikimedia Commons has media related to Lyulka AL-21.

• Page of the engine at Russian Aircraft Encyclopedia

На других языках

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[de] Ljulka AL-21

Das Ljulka AL-21 ist ein Luftstrahltriebwerk, das in der UdSSR von Archip Michailowitsch Ljulka ab Anfang der 1960er Jahre als Nachfolger des AL-7 entwickelt und ab 1967 in Großserie gefertigt wurde. Bis 1991 wurden im Werk Nr. 45 in Moskau 5011 Exemplare gebaut.[1]

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- [en] Lyulka AL-21

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[fr] Lyulka AL-21

Le moteur Lyulka AL-21 est un turboréacteur axial créé par l'entreprise soviétique Lyulka nommé d'après son chef concepteur Arkhip Mikhailovich Lyulka (1908-1984). L'AL-21 est entré en service au début des années 1960. Sous la désignation finale AL-21F-3, il a motorisé le Soukhoï Su-17M 'Fitter', le Soukhoï Su-24 'Fencer', les premiers Mikoyan-Gurevich MiG-23 'Flogger', ainsi que le Soukhoï T-10 (prototype du Soukhoï Su-27 'Flanker'). Une version sans post-combustion propulse le chasseur à décollage et atterrissage verticaux Yakovlev Yak-38 'Forger'.

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[it] Lyulka AL-21

Il Lyulka AL-21 è un motore turbogetto a flusso assiale progettato dall'ufficio tecnico di Archip Michajlovič Ljul'ka, in Unione Sovietica.[1]

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[ru] АЛ-21Ф-3

АЛ-21Ф-3 (изделие «89») — одноконтурный одновальный турбореактивный двигатель с форсажной камерой третьего поколения разработанный под руководством Генерального конструктора ОКБ-165 А. М. Люльки. Является дальнейшим развитием базового двигателя АЛ-21Ф и отличается от него увеличенной тягой и улучшенными характеристиками. Устанавливался на фронтовой бомбардировщик Су-24, на истребители-бомбардировщики Су-17 и МиГ-23Б, а также на первые прототипы Т-10.

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