Saturn AL-31

Saturn AL-31FN

The Saturn AL-31F is a turbofan engine from the Russian engine manufacturer NPO Saturn . The engine originally designed by the design office Lyulka ( A rchip Michailowitsch L julka - AL) was developed for the Su-27 and forms the basis for numerous further developments.

variants

AL-31F

Initial version for the Su-27; available in variants F1 to F3.

AL-31FL

AL-31F variant with reduced bypass flow ratio.

AL-31FM

Heavily modernized version of the AL-31F with increased thrust, which is available in the variants M1 to M3. Originally only intended as a test series, the M3 version is now considered a possible alternative to the 117S for the Suchoi Su-57 after the development of the AL-41F was discontinued. The AL-31FM is sometimes also referred to as the AL-35FM, although it is not the AL-35F for the Su-34 .

AL-31FN

Export version of the AL-31F for the Chinese J-10A .

AL-31FP

The AL-31FP was developed in cooperation with HAL from the AL-31FM1 test series for the Indian Su-30MKI . It has a 3D thrust vector control that can move the outlet nozzles by 15 ° in all directions at a rate of 30 ° / s.

Further developments

AL-32M

Afterburnerless civil version of the AL-31F for the Tupolev Tu-444 supersonic airliner .

AL-35F

Further development of the AL-31FM for the Su-34 with up to 137.21 kN thrust.

AL-37FU

Further development of the AL-31F with thrust vector control for the Su-37 , which was initially also known as the AL-31FU.

117S

The NPO Saturn 117S is a comprehensive further development based on the AL-31F. It was developed for the Su-35BM , with an emphasis on increasing the dry thrust to achieve supersonic speeds without an afterburner ( supercruise ). For this, the fan diameter was increased by 3% (932 instead of 905 mm) and a completely revised digital control ( FADEC ) was installed. At the same time, the thrust vector control of the AL-31FP was taken over. The MTBO duration could be increased from 500 to 1000 hours and the maximum service life from 1500 to 4000 hours. The 117S is also called the AL-41FA1, but it should not be confused with the AL-41F . It is now also planned for the Sukhoi Su-57.

Technical specifications

variant	AL-31F1	AL-31F3	AL-31FL	AL-31FM	AL-31FN	AL-31FP
Length:	4,990 m	k. A.	4,990 m	k. A.	k. A.	k. A.
Diameter:	905 mm	905 mm	905 mm	905 mm	905 mm	905 mm
Weight:	1,570 kg	k. A.	k. A.	k. A.	k. A.	k. A.
Maximum dry thrust:	74.50 kN	75.06 kN	74.50 kN	79.43 kN	76.20 kN	79.43 kN
Maximum afterburner thrust:	122.58 kN	125.57 kN	122.58 kN	144.54 kN	124.54 kN	130.76 kN

Individual evidence

1. ↑ Milavia.net - Sukhoi Su-35 " 4+ Generation Flanker" , April 12, 2009
2. ↑ Frontier India Strategic and Defense - NPO Saturn finishes endurance tests for S-117 Engine meant for SU-35 ( Memento of the original from March 28, 2008 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , February 11, 2008