| AL-21 | |
|---|---|
 Lyulka AL-21F3 engine, Airforce Museum of the Bundeswehr; Berlin-Gatow | |
| Type | Turbojet |
| National origin | Soviet Union |
| Manufacturer | NPO AL, Salyut, Perm PMZ, OMKB, UMPO, MMP Chern |
| Major applications | |
TheLyulka AL-21 is anaxial flowturbojet engine created by theSovietDesign Bureau named for its chief designerArkhip Lyulka.
The AL-21 is closely similar in technology to theGeneral 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 Sovietgas turbine engines which are characterized by high thrust-to-weight ratios and the use ofturbine air cooling.[2]
The AL-21 entered service in the early 1960s. Later designed theAL-21F3, it was used in theSukhoi Su-17,Sukhoi Su-24, Ground-attack variantMikoyan-Gurevich MiG-23, andSukhoi T-10 (Sukhoi Su-27 prototype).
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