Solovyov, Dmitry (20 August 2009). "Interview: Russia's new fighter to fly by yr-end – Sukhoi". Reuters. Archived from the original on 16 January 2010 . Retrieved 20 August 2009.

PAK FA – Russia Special Report". FlightGlobal. 2 August 2011. Archived from the original on 28 May 2014 . Retrieved 10 May 2014. a b c "Sukhoi Forecasted 600 Su-57 Sale During Design Phase of the Aircraft". Global Defense Corp. 25 June 2021 . Retrieved 20 July 2021. Russia Completes Testing of Su-57 Avionics 'Complex' – Avionics". Avionics. 23 November 2018. Archived from the original on 30 November 2018 . Retrieved 30 November 2018.Powerplant: 2 × Saturn AL-41F1 afterburning turbofan, 88.3kN (19,900lbf) thrust eachdry, 142.2kN (32,000lbf) with afterburner, 147.1kN (33,100lbf) in emergency power Butowski, Piotr (22 September 2007). "Wraps come off new Russian fighters: Russia's so-called "intermediate-generation" fighters made their debut at MAKS 2007". Interavia Business & Technology. Aerospace Media Publishing. OCLC 71365085. Archived from the original on 5 November 2013 . Retrieved 19 April 2013. Addition of a faster flowing sports alternative usually solves exhaust limitation issues caused by fitted emissions filters.

For example, by enhancing the exhaust flow through a DPF delete (where legal in your area), you can potentially achieve power increases of around 390 horsepower. In this case, a gearbox remap becomes necessary to handle the increased torque.

In July 2021, it was officially announced that a two-seater variant of the Su-57 was under development, to be used for training pilots and for ensuring the control of the Sukhoi S-70 Okhotnik UCAV. [237] This variant was also mentioned at the Army-2022 forum in August 2022. [238] Operators [ edit ] Russia Sysoev, Grigoriy (13 February 2012). "Russia to Increase Number of 5G Fighters in Test Flights". RIA Novosti. Archived from the original on 17 April 2012 . Retrieved 16 October 2014. KRET develops new Okhotnik target detection system for Russia's PAK FA fighter jet". airrecognition.com. 1 August 2016. Archived from the original on 21 February 2019 . Retrieved 21 February 2019. Sukhoi's approach to the PAK FA competition differed fundamentally from Mikoyan's; whereas Mikoyan proposed for the three design bureaus (Mikoyan, Sukhoi, and Yakovlev) to cooperate as a consortium with the winning team leading the design effort, Sukhoi's proposal had itself as the lead designer from the beginning and included a joint work agreement that covered the entire development and production cycle, from propulsion and avionics suppliers to research facilities. Additionally, the two companies had differing design philosophies for the aircraft. Mikoyan's E-721 was smaller and more affordable, with normal takeoff weight of 16–17 tonnes (35,000–37,000lb) and powered by a pair of Klimov VK-10M engines with 10–11 tonnes (98.1–108kN, 22,000–24,300lbf) of thrust each. In contrast, Sukhoi's T-50 would be comparatively larger and more capable, with normal takeoff weight goal of 22–23 tonnes (49,000–51,000lb) and powered by a pair of Lyulka-Saturn AL-41F1 engines each with maximum thrust in the 14.5-tonne (142kN, 32,000lbf) class. [14] [15] [N 5] Karnozov, Vladimir (29 January 2010). "Sukhoi's PAK FA fighter completes first flight". FlightGlobal. Archived from the original on 16 February 2014 . Retrieved 1 February 2010.

Russia tries something different – an 'electric' Su-57 fighter jet". bulgarianmilitary.com. 27 April 2020 . Retrieved 2 May 2020.The N57 is a diesel engine and was used in a wide array of models, belonging to their family of modular engines but it pulls and revs so smoothly you might mistake it for a naturally aspirated engine. Adding a supercharger or additional turbo will make large bhp gains, although harder to get working. We have this feature on twinchargers if you want to read more. Fuelling mods for the N57 RU 2502643,"Многофункциональный самолет с пониженной радиолокационной заметностью (Multifunctional aircraft with reduced radar signature)" These enhancements will prevent premature wear and ensure consistent performance, even in the face of significant engine upgrades.