Saturn AL-41F1 because it can only produce 32,500lbs thrust after burning its turbofan engine marginally increases in perfomance comparable to Su 35-s Flanker E. However, after 2025, they expect to procure at least 160 of new Su-57 wtih newengine. The new powerplant is expected to deliver 24,054lbs dry thrust and 39,566lbs after burning thrust. The Izdeliye-30 turbofan engine will make Pak FA a true 5th generation fighter jet.
Russia’s contribution to the 5th Generation of air combat super-fighters moved ahead tangibly in early December with the successful flight of the first Sukhoi Su-57 using its new, upgraded Izdeliye-30 turbofan engine.
The first successful test flight with an Su-57 using the new Izdeliye-30 took place on Tuesday, Dec. 5, 2017. The 17-minute test flight by Sukhoi chief test pilot Sergei Bogdan was launched from the M.M. Gromov flight test center, in Zhukovsky, Russia about 25 miles outside of Moscow.
The new engine replaces the former NPO Saturn Izdeliye 117, also referred to as the AL-41F1. These original Izdeliye 117s were reported to be underpowered for the Su-57s 55,116 pound reported take-off weight. The Izdeliye 117 was never meant as a permanent powerplant for the Su-57 and its use drew criticism, some of it unwarranted, from western analysts.
https://theaviationist.com/2017/12/22/russias-su-57-stealth-fighter-completes-engine-upgrade-and-continues-development-amid-business-concerns/
