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{|{{Infobox aircraft begin
|name= PAK FA
|image=Sukhoi T-50 Beltyukov.jpg
|caption= PAK FA T-50}}{{Infobox aircraft type
|type =[[Stealth aircraft|Stealth]] [[Multirole combat aircraft|multirole fighter]]
|national origin= [[Russia]]
|designer= <!--Only appropriate for single designers, not project leaders-->
|manufacturer= [[Sukhoi]]
|first flight= 29 January 2010<ref>{{Citation |place= RU |url= http://en.rian.ru/russia/20100129/157715872.html |title= Russia draws back veil of secrecy with peek at future fighter |newspaper= RIA Novosti |accessdate= 29 January 2010 |date= 2012‐1‐29}}.</ref>
|introduction= 2016<ref>{{cite web |url=http://en.ria.ru/military_news/20130425/180840337.html |title=New T-50 Fighter Jet to Enter Service in 2016 – Putin |last1=Druzhinin |first1=Alexei |date=25 April 2013 |work=RIA Novosti |publisher= |accessdate=25 April 2013}}</ref><!--date the aircraft entered or will enter military or revenue service-->
|retired=
|status= Test flight/pre-production
|primary user= [[Russian Air Force]] <!-- Only 1 user in this field. -->
|more users= [[Russian Navy]]<ref name="RMN">{{Citation |last= Druzhinin |first= Alexei |place= RU |url= http://www.en.rian.ru/mlitary_news/20100928/160747881.html |title= Defense: Russian Navy to get fifth generation carrier fighter after 2020 |newspaper= RIA Novosti |date= 28 September 2009 |accessdate= 26 January 2011}}.</ref><!-- India's version is covered at [[Sukhoi/HAL FGFA]]. -->
|produced= <!--Years in production (e.g. 1970&ndash;1999) if still in active use but no longer built -->
|number built= 5 prototypes<ref>http://indrus.in/economics/2013/06/29/t-50_fighter_to_be_ready_in_2013_26603.html</ref>
|program cost= [[United States dollar|US$]]8–10 billion (est.)<ref>Pandit, Rajat. [http://articles.timesofindia.indiatimes.com/2009-10-10/india/28069553_1_india-and-russia-anatoly-serdyukov-admiral-gorshkov "India, Russia to ink new military pact."] ''[[Times of India]]'', 10 October 2009.</ref><ref name= "Shukla-PACT">Shukla, Ajai. [http://www.business-standard.com/india/news/india-russia-close-to-pactnext-generation-fighter/381718/ "India, Russia close to PACT on next generation fighter."] ''[[Business Standard]],'' 5 January 2010.</ref><ref name= "Shukla-costs">Shukla, Ajai. [http://www.business-standard.com/india/news/india-to-develop-25fifth-generation-fighter/381786/ "India to develop 25% of fifth generation fighter/"] ''Business Standard,'' 6 January 2010.</ref>
|unit cost= T-50: US$50+&nbsp;million<ref>Defence International 2011/02 P.35 (Chinese) [official Russian estimate]</ref><<!--Incremental or flyaway cost for military or retail price for commercial aircraft --><br/>FGFA: US$100&nbsp;million<ref>[http://www.business-standard.com/article/economy-policy/delays-and-challenges-for-indo-russian-fighter-112051502009_1.html "Delays and challenges for Indo-Russian fighter."]</ref>
|variants with their own articles= [[Sukhoi/HAL FGFA]]}}
|}
The '''Sukhoi PAK FA''' ({{lang-ru|Сухой ПАК ФА}}, {{lang-ru|Перспективный авиационный комплекс фронтовой авиации}}, ''Perspektivny Aviatsionny Kompleks Frontovoy Aviatsii'', literally "Prospective Airborne Complex of Frontline Aviation") is a [[Twinjet|twin-engine]] [[Jet aircraft|jet]] [[Fighter aircraft|fighter]] being developed by [[Sukhoi]] for the [[Russian Air Force]]. The Sukhoi '''T-50''' is the [[prototype]] for PAK FA.<ref>Daly, Kieran. [http://www.flightglobal.com/articles/2009/08/11/330688/russias-united-aircraft-reaches-maturity.html "Russia's United Aircraft reaches maturity."] ''[[Flight International]],'' 11 August 2009.</ref> The PAK FA is one of only a handful of stealth jet programs worldwide.<ref>[http://www.globalbearings.net/2011/11/stealth-war-comparative-global-look.html "The Stealth Jet War: A Global Comparison."] ''Global Bearings,'' 1 November 2011.</ref>

The PAK FA, a [[fifth generation jet fighter]], is intended to be the successor to the [[Mikoyan MiG-29|MiG-29]] and [[Sukhoi Su-27|Su-27]] in the Russian inventory and serve as the basis of the [[Sukhoi/HAL FGFA]] being developed with [[India]].<ref name="Unnithan">Unnithan, Sandeep. [http://indiatoday.intoday.in/site/Story/16398/LATEST%20HEADLINES/India,+Russia+to+have+different+versions+of+same+fighter+plane.html "India, Russia to have different versions of same fighter plane."] ''India Today, ''29 September 2008.</ref><ref>Cohen, Ariel. [http://www.upi.com/Business_News/Security-Industry/2009/01/16/Russia-bets-on-new-Sukhoi-fighter-to-match-F-35/UPI-93841232131619/ "Russia bets on new Sukhoi fighter to match F-35."] ''[[United Press International]] (UPI),'' 16 January 2009.</ref> The T-50 prototype performed its first flight 29 January 2010.

The [[Ministry of Defence (Russia)|Russian Defence Ministry]] will purchase the first 10 evaluation example aircraft after 2012 and then 60 production standard aircraft after 2016.<ref>Druzhinin, Alexei.[http://www.en.rian.ru/mlitary_news/20100713/159797767.html "Russian military to buy 60 fifth-generation fighters after 2016."] ''rian.ru.'' Retrieved: 26 January 2011.</ref><ref>[http://english.ruvr.ru/2010/07/19/12786897.html "Russia to almost double arms spending."] ''ruvr.ru.'' Retrieved: 26 January 2011.</ref><ref name="ria.ru.mn">[http://en.ria.ru/mlitary_news/20120614/174028701.html "Fourth T-50 Stealth Fighter to Fly This Year."]''RIA Novosti'', 14 June 2012.</ref> The first batch of fighters will be delivered with current technology engines. The PAK-FA is expected to have a service life of about 30–35 years.<ref name="Druzhinin"/>
{{TOC limit|limit=2}}

==Development==

===Origins===
In the late 1980s, the [[Soviet Union]] outlined a need for a next-generation aircraft to replace its MiG-29s and Su-27s in [[front line]] service. Two projects were proposed to meet this need&nbsp;– the [[Sukhoi Su-47]] and the [[Mikoyan Project 1.44]]. In 2002, [[Sukhoi]] was chosen to lead the design for the new combat aircraft.<ref name=Putin_satisfied>[http://en.rian.ru/russia/20100420/158666082.html "Premier Putin satisfied with Russian fifth-generation fighter tests"]. ''RIA Novosti,'' 20 April 2010.</ref> The [[Novosibirsk Aircraft Production Association]] is manufacturing the new multirole fighter at [[Komsomol'sk-on-Amur]] along with [[Komsomolsk-on-Amur Aircraft Production Association]]. Final assembly is to take place at Komsomol'sk-on-Amur.{{Citation needed|date=April 2012}}

The Tekhnokompleks Scientific and Production Center, Ramenskoye Instrument Building Design Bureau, the [[Tikhomirov Scientific Research Institute of Instrument Design]], the Ural Optical and Mechanical Plant ([[Yekaterinburg]]), the Polet firm ([[Nizhny Novgorod]]) and the Central Scientific Research Radio Engineering Institute (Moscow) were pronounced winners in the competition held in early 2003 for the development of the [[avionics]] suite. NPO Saturn is the lead contractor for the engines.{{Citation needed|date=April 2012|reason=Last part paragraph needs to be cited.}}

In 2007, Russia and India agreed to jointly develop the [[Sukhoi/HAL FGFA|Fifth Generation Fighter Aircraft Programme]] (FGFA) for India.<ref>http://www.sukhoi.org/eng/news/company/?id=5125</ref><ref>{{cite news| url=http://articles.timesofindia.indiatimes.com/2009-10-10/india/28069553_1_india-and-russia-anatoly-serdyukov-admiral-gorshkov | work=The Times Of India | title=India, Russia to ink new military pact | date=10 October 2009}}</ref><ref>http://www.business-standard.com/article/economy-policy/india-russia-close-to-pact-on-next-generation-fighter-110010500074_1.html</ref> In September 2010, it was reported that India and Russia had agreed on a preliminary design contract where each country invests $6&nbsp;billion; development of the FGFA fighter was expected to take 8–10&nbsp;years.<ref>[http://www.business-standard.com/india/news/india-russia-to-ink-gen-5-fighter-pact/407746/ "India, Russia to Ink gen-5 fighter pact"]. ''business-standard.com.'' Retrieved: 19 November 2012.</ref> The agreement on the preliminary design was to be signed in December 2010.<ref>[http://en.rian.ru/mlitary_news/20101027/161108468.html "Russia, India to begin design of 5G-fighter in December"]. ''[[RIA Novosti]]'', 27 October 2010. Retrieved: 19 November 2012.</ref>

On 8 August 2007, Russian Air Force [[Commander-in-Chief]] (CinC) [[Alexander Zelin]] was quoted by Russian news agencies that the development stage of the PAK FA program was complete and construction of the first aircraft for [[flight testing]] would begin.<ref>[http://en.rian.ru/russia/20070808/70574505.html "Russia to build fifth-generation fighter prototype soon"]. ''RIA Novosti,'' 8 August 2007.</ref> Zelin also said that by 2009 there would be three fifth-generation aircraft ready. "All of them are currently undergoing tests and are more or less ready," he said.<ref name="FirstFlt2009">[http://en.rian.ru/russia/20090121/119740202.html "Russia's next-generation warplane to make maiden flight in 2009"]. ''RIA Novosti,'' 21 January 2009.</ref> In mid-2009 the design was approved.<ref name=Putin_satisfied/>

===Flight testing===
The T-50's maiden flight had been repeatedly postponed since early 2007 as the aircraft encountered unspecified technical problems. Alexander Zelin admitted as recently as August 2009 that problems with the engine and in technical research remained unsolved.<ref>Halpin, Tony. [http://www.timesonline.co.uk/tol/news/world/europe/article7007913.ece "Russia unveils its first stealth fighter jet - the Sukhoi T-50"]. ''The Times'' (London), 30 January 2010. Retrieved: 7 February 2010.</ref> On 28 February 2009, Mikhail Pogosyan announced that the airframe for the aircraft was almost finished and that the first prototype should be ready by August 2009.<ref>[http://www.india-defence.com/reports-4254 "Sukhoi PAK FA Updates: First Prototype by August 2009, Special Software for Indian Versions"]. ''India Defence'', 28 February 2009.</ref> On 20 August 2009, Pogosyan said that the first flight would be by year's end. Konstantin Makiyenko, deputy head of the Moscow-based [[Centre for Analysis of Strategies and Technologies]] said that "even with delays", the aircraft would likely make its first flight by January or February, adding that it would take five to ten years for commercial production.<ref>Solovyov, Dmitry. [http://in.reuters.com/article/worldNews/idINIndia-41866120090820?feedType=RSS&feedName=worldNews&pageNumber=1&virtualBrandChannel=11584 "Interview: Russia's new fighter to fly by yr-end - Sukhoi"]. [[Reuters]], 20 August 2009.</ref>

[[File:Sukhoi T-50 Pichugin 2.jpg|thumb|right|PAK FA T-50 with landing gear down, April 2010]]

On 8 December 2009, Deputy Prime Minister [[Sergei Ivanov]] announced that the first trials with the fifth-generation aircraft would begin in 2010.<ref>[http://en.rian.ru/russia/20091208/157157685.html "Russia to start 5th generation fighter tests in 2010 &ndash; deputy PM"]. ''RIA Novosti,'' 8 December 2009.</ref> The first taxi test was successfully completed on 24 December 2009.<ref>[http://www.lenta.ru/news/2009/12/24/pakfa/ {{lang|ru|"Начались испытания российского истребителя пятого поколения"}} ["Russian fifth-generation fighter tests have begun"&#93;(in Russian)".] ''Lenta.ru,'' 24 December 2009.</ref><ref>[http://www.bbc.co.uk/russian/russia/2009/12/091224_sukhoi_new_runway.shtml {{lang|ru|"Сухой" пятого поколения совершил пробежку}} &#91;"Sukhoi fifth-generation fighter taxiing" &#93; (in Russian).] ''[[BBC Russian Service]],'' 24 December 2009.</ref><ref>Vogelaar, Rob. [http://www.aviationnews.eu/2009/12/29/sukhois-pak-fa-or-t-50-started-taxi-trials-first-flight-early-in-january/ "Sukhoi's PAK-FA or T-50 started taxi trials, first flight early in January"]. ''Aviation-News,'' 29 December 2009.</ref> Piloted by [[Hero of the Russian Federation]] Sergey Bogdan, the aircraft's 47-minute maiden flight took place on 29 January 2010 at [[KnAAPO]]'s [[Dzemgi Airport]] in the [[Russian Far East]].<ref name= "Flight">{{Citation |url= http://www.lenta.ru/news/2010/01/29/fighter/ |title= Российский истребитель пятого поколения поднялся в воздух |language= Russian |newspaper= [[Lenta.ru]] |accessdate= 29 January 2010}}.</ref><ref>[http://www.lenta.ru/news/2010/01/29/firstflight/ Lenta.Ru: Оружие: Первый полет российского истребителя пятого поколения прошел успешно]</ref><ref>[http://www.sukhoi.org/eng/news/company/?id=3143 "Sukhoi Company launches flight tests of PAK FA advanced tactical frontline fighter"]. ''Sukhoi Company (JSC)'', 29 January 2010.</ref><ref>Pandit, Rajat. [http://epaper.timesofindia.com/Default/Scripting/ArticleWin.asp?From=Archive&Source=Page&Skin=TOINEW&BaseHref=TOIKM/2010/01/30&PageLabel=13&EntityId=Ar01301&ViewMode=HTML&GZ=T "1st test of 5-Gen fighter in Russia"]. ''Times of India.'' Retrieved: 26 January 2011.</ref>

By 31 August 2010, it had made 17 flights and by mid-November, 40 in total. The second T-50 was to start its flight test by the end of 2010, but this was delayed until March 2011.<ref name=autogenerated2>[http://en.rian.ru/mlitary_news/20110303/162844406.html Russia tests 2nd prototype of fifth-generation fighter |Defense |RIA Novosti<!-- Bot generated title -->]</ref><ref>[http://www.brahmand.com/news/Second-PAK-FA-prototype-to-fly-in-2011-UAC/5867/3/13.html "Second PAK FA prototype to fly in 2011: UAC"]. ''[[Brahmand]]'', 21 December 2010.</ref><ref>[http://www.sukhoi.org/news/company/?id=3165 ОАО "Компания "Сухой" - Новости - Новости компании"] (in Russian). ''sukhoi.org.'' Retrieved: 26 January 2011.</ref><ref>[http://www.flightglobal.com/articles/2010/09/07/347018/pictures-indian-officials-get-up-close-to-new-look-pak-fa.html "Pictures: Indian officials get up close to new-look PAK FA fighter"]. flightglobal.com. Retrieved: 26 January 2011.</ref><ref>[http://en.rian.ru/mlitary_news/20101122/161440526.html "Defense: Second prototype fifth-generation fighter to fly before yearend"]. ''RIA Novosti.'' Retrieved: 26 January 2011.</ref>

A second prototype was first planned to join the flight testing in the fourth quarter of 2010 but was postponed. On 3 March 2011, it was reported that the second aircraft had made a successful 44-minute test flight.<ref name=autogenerated2 /> These first two aircraft will lack radar and weapon control systems. The third and fourth aircraft, to be added in 2011, will be fully functional test aircraft.<ref name="Komarov">Komarov, Alexey. [http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=defense&id=news/awst/2010/03/08/AW_03_08_2010_p34-209244.xml&headline=More%20Sukhoi%20T-50s%20To%20Fly%20In%20Next%2012%20Months "More Sukhoi T-50s To Fly In Next 12 Months"]. ''Aviation Week'', 12 March 2010. Retrieved: 26 January 2011.</ref> On 14 March 2011, the aircraft achieved supersonic flight at a test range near [[Komsomolsk-on-Amur Aircraft Production Association|Komsomolsk-on-Amur]] in Siberia.<ref>[http://rt.com/news/fighter-pak-fa-supersonic/ "Fifth-gen fighter PAK FA goes supersonic"]. ''RT.'' Retrieved: 12 April 2011</ref>

[[File:Sukhoi T-50 MAKS'11 Zherdin.jpg|thumb|left|T-50 flying at MAKS 2011]]

The T-50 was displayed publicly for the first time at the 2011 [[MAKS Airshow]]. Russian Prime Minister Vladimir Putin was in attendance.<ref>[http://www.bbc.co.uk/news/world-europe-14564311 "Russia shows off Sukhoi T-50 stealth fighter"]. BBC News, 17 August 2011.</ref><ref>Miranovsky, Anatoly. [http://english.pravda.ru/russia/economics/13-09-2010/114900-sukhoi-0/ "Russia to export 600 Sukhoi PAK FA fifth generation jets. India to acquire and jointly develop 250 sukhoi T-50 this fifth generation fighters with Russia"]. ''Pravda''. Retrieved: 26 January 2011.</ref> In June 2011, an unauthorized video was made of the Sukhoi PAK FA in flight displaying a variety of aerobatic moves.<ref>[http://defensetech.org/2011/06/10/video-sukhoi-pak-fa-stealth-fighter-aerobatics/ "Video: Sukhoi PAK FA Stealth Fighter Aerobatics"]. ''Defense Tech,'' 10 June 2011.</ref> On 3 November 2011, the PAK FA program achieved its 100th flight.<ref>[http://www.avionews.com/index.php?corpo=see_news_home.php&news_id=1135291&pagina_chiamante=index.php "PAK-FA programme: 100th test performed yesterday"]. ''WAPA'', 4 November 2011.</ref> More than 20 test flights were made in the next nine months.<ref>Karnozov, Vladimir. [http://www.ainonline.com/aviation-news/ain-defense-perspective/2012-08-31/sukhoi-t-50-moves-radar-flight-refueling-tests "Sukhoi T-50 Moves to Radar, In-flight Refueling Tests"]. ''Aviation International News'', 31 August 2012.</ref>

The third prototype, T-50-3, was the first prototype to fly with an [[Active electronically scanned array|AESA]] radar. Originally scheduled for the end of 2011, these flights occurred in August 2012, and showed performance comparable to existing radars.<ref>Trimble, Stephen. [http://www.flightglobal.com/blogs/the-dewline/2011/11/third-pak-fa.html "Third PAK-FA prototype breaks cover"]. ''Flight Global'', 21 November 2011.</ref><ref>[http://www.defpro.com/news/details/38365/?SID=6359fad858f10a6e854567fa5c99fe96 "Sukhoi Begins Testing Onboard Radar System for T-50 Aircraft"]. ''Sukhoi Company'', 8 August 2012.</ref> On 22 November 2011, T-50-3 took its first flight from KnAAPO's airfield in Komsomolsk-on-Amur, piloted by Sergey Bogdan. The aircraft spent over an hour in the air, and was subjected to basic stability and powerplant checks.<ref>[http://sukhoi.org/eng/news/company/?id=4482 "Sukhoi Company adds the third PAK FA prototype to flight tests program"]. ''Sukhoi.'' Retrieved: 28 September 2012.</ref> It differs from the other prototypes in the way it lacks a [[pitot tube]]. All 14 test aircraft are scheduled to fly by 2015.<ref>Sysoev, Grigoriy. [http://en.ria.ru/mlitary_news/20120213/171286237.html "Russia to Increase Number of 5G Fighters in Test Flights"]. ''RIA Novosti'', 13 February 2012.</ref>

The fourth prototype had its first flight on 12 December 2012<ref>[http://en.ria.ru/military_news/20121212/178100717.html "Fourth T-50 Stealth Fighter Flies"].</ref> and joined the other three aircraft in testing near Moscow a month later.<ref>[http://en.ria.ru/military_news/20130117/178844683.html "Russian T-50 Fighter Jet Completes First Long-Range Flight"].</ref><ref>[http://www.sukhoi.org/eng/news/company/?id=5052 "T-50-4 made the first flight from Komsomolsk-on-Amur to Zhukovsky"].</ref>

==Design==

===Overview===
[[File:Sukhoi T-50 Pichugin.jpg|thumb|Prototype T-50 in flight]]

Although most information about the PAK FA is classified, sources within in the [[Russian Air Force]] and Defense Ministry have openly stated that it features [[stealth technology]] and has the capability to [[supercruise]],<ref name="Shukla-PACT"/> and incorporate advanced avionics such as an [[AESA|Active Electronically Scanned Array]] (AESA) radar and an [[artificial intelligence]] system.<ref>Tendulkar, Sachin. [http://www.zeenews.com/news589876.html "Russia to commence flight tests of FGFA."] ''[[Zeenews.com]],'' 23 December 2009. Retrieved: 26 January 2011.</ref> It is to be outfitted with the next generation of [[Air-to-air missile|air-to-air]], [[air-to-surface missile|air-to-surface]], and [[anti-ship missile|air-to-ship missile]]s.<ref>Barrie, Douglas and Alexey Komarov. [http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=defense&id=news/RUSSAF082609.xml&headline=Fighter%20Order%20Rekindles%20Russian%20Air%20Force "Fighter Order Rekindles Russian Air Force"]. ''[[Aviation Week & Space Technology]],'' 26 August 2009. Retrieved: 26 January 2011.</ref>

Video from the PAK FA's first flight shows that it has no conventional rudders; its [[Vertical stabilizer|vertical tails]] are fully movable.<ref>[http://www.youtube.com/watch?v=P0uS9arMJhs "Maiden Flight of T-50 (PAK FA)."] ''Youtube,'' 29 January 2010. Retrieved: 26 January 2011.</ref> This special tail fin design is mechanically similar to [[V-tail]]s used by the [[Northrop YF-23]] in 1990s,<ref>[http://www.globalsecurity.org/military/systems/aircraft/f-23.htm "YF-23 Black Widow II."] ''GlobalSecurity.org.'' Retrieved: 26 January 2011.</ref> but is supplemented by dedicated horizontal [[stabilator]]s (as on the [[Lockheed F-22 Raptor|F-22]]). The T-50 has wing leading-edge devices above the jet engine intakes that may pose a challenge for signature control.<ref>[http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=defense&id=news/awst/2010/02/08/AW_02_08_2010_p30-201984.xml&headline=Major%20Work%20Ahead%20On%20T-50%20Stealth%20Fighter "Major Work Ahead On T-50 Stealth Fighter."] ''aviationweek.com,'' 8 February 2010. Retrieved: 26 January 2011.</ref>

Composites are used extensively on the T-50 and comprise 25% of its weight and almost 70% of the outer surface.<ref name="Komarov"/> It is estimated that [[titanium]] alloy content of the fuselage is 75%. Sukhoi's concern for minimizing radar cross-section (RCS) and drag is also shown by the provision of two tandem main weapons bays in the centre fuselage, between the engine nacelles. Each is estimated to be between 4.9-5.1 m long. The main bays are augmented by bulged, triangular-section bays at the wing root.<ref>Lake 2010, pp. 26–33.</ref> The combined effect is estimated to have reduced the radar cross-section to that of a tennis ball, or approximately 0.005m^2.<ref>http://rt.com/shows/technology-update/russia-aviation-maks-airshow-401/</ref>

The [[Moskovsky Komsomolets]] reported that the T-50 has been designed to be more maneuverable than the [[F-22 Raptor]], at the cost of making it less stealthy than the F-22.<ref name="Not5thGen">[http://english.pravda.ru/russia/economics/18-06-2010/113908-fifth_generation-0 "Russia's T-50 PAK FA Not Fifth-Generation Fighter Jet Yet."] ''pravda.ru.'' Retrieved: 26 January 2011.</ref> One of the design elements that have such an effect is the Leading Edge Vortex Controller (LEVCON).

===Avionics===
[[File:PAK FA AESA maks2009.jpg|thumb|[[Tikhomirov Scientific Research Institute of Instrument Design|NIIP]]'s [[Active Electronically Scanned Array|AESA]] [[radar]] for the PAK FA on display at the 2009 [[MAKS (air show)|MAKS airshow]]]]

The T-50's avionics consists of the Sh121 multifunctional integrated radio electronic system (MIRES) and the 101KS electro-optical system.<ref name="Air International October 2011 p66">Butowski 2011, p. 66.</ref> The Sh121 consists of the N036 radar complex and L402 electronic countermeasures system. The N036 radar complex is developed by Tikhomirov NIIP Institute and is comprised of a main nose-mounted X-band AESA radar with 1522 T/R modules, designated the N036-1-01,<ref name="Aviation News July 2012 p50">Butowski 2012, p. 50.</ref> and two smaller X-band AESA radars with 358 T/R modules mounted on the side of the forward fuselage designated N036B-1-01. The suite also has two N036L-1-01 L-band arrays on the wing's leading edge extensions that function primarily as identification friend-or-foe (IFF).<ref name="Air International October 2013 p78">Butowski 2013, p. 78.</ref> According to Sukhoi, the radar will reduce pilot load and make use of a new data link to share information between aircraft.<ref>[http://sukhoi.org/eng/news/company/?id=3143 "Sukhoi Company launches flight tests of PAK FA advanced tactical frontline fighter."] ''sukhoi.org.'' Retrieved: 26 January 2011.</ref> In 2012 ground tests began on the third aircraft of the Tikhomirov Scientific Research Institute of Instrument Design's AESA radar.<ref>[http://en.ria.ru/mlitary_news/20120808/175068051.html "Sukhoi Tests New Radar Array for 5th-Generation Fighter."] ''RIA Novosti'', 8 August 2012.</ref> The L402 electronic countermeasures (ECM) suite made by the KNIRTI institute uses both its own arrays and that of the N036 radar. One of its arrays is mounted in the dorsal sting between the two engines. <ref name="Air International October 2013 p79">Butowski 2013, p. 79.</ref>

The 101KS electro-optical system includes the 101KS-V [[infra-red search and track]] mounted on the starboard side in front of the cockpit. This sensor can detect, identify, and track multiple airborne targets simultaneously. <ref name="Aviation News July 2012 p50">Butowski 2012, p. 50.</ref> The 101KS-O is mounted on a turret in the dorsal spine and is a laser-based countermeasure against heat-seaking missiles. The complex will also include the 101KS-U ultraviolet warning sensors and 101KS-N navigation and targeting pod.<ref name="Air International October 2013 p80">Butowski 2013, p. 80.</ref>

===Cockpit===
Life support systems will enable pilots to sustain 9 g in maneuvers. New pressure suits will allow safe ejection at altitudes of up to 23&nbsp;km.<ref name="ruaviation.com">http://www.ruaviation.com/news/2013/7/9/1799/</ref>

===Stealth===
Russian sources indicate the PAK FA lacks the very-low-observable (VLO) stealth of the F-22. Instead, reducing observability with composite materials, aerodynamic configuration, and engine signature reduction measures to achieve low (but not very-low) levels of radar, optic and infrared signatures.<ref>[http://english.pravda.ru/russia/economics/18-08-2011/118783-pak_fa_raptor-0/ "Sukhoi PAK FA T-50 much more powerful than USA's F-22 Raptor."] ''Pravda'', 18 August 2011.</ref> [[Carlo Kopp]] has said that once the PAK FA is fully developed into a stealthy design, it should be a rough match for the F-35 in low observability, but aerodynamically superior.<ref>Axe, David. [http://www.wired.com/dangerroom/2012/11/russia-stealth/ "Russia’s Stealth Fighter Could Match U.S. Jets, Analyst Says."] ''Wired Magazine'', 16 November 2012.</ref> Sources claim that the PAK FA may incorporate "[[Plasma stealth]]" although no solid evidence of this has been shown.{{citation needed|date=June 2013}}

===Armament===
The PAK FA has a reported maximum weapons load of 7,500&nbsp;kg.<ref name="Vesti"/> It has an apparent provision for a cannon (most likely [[GSh-301]]), and could possibly carry two 30&nbsp;mm cannons.<ref name="Druzhinin">Druzhinin, Alexei. [http://en.rian.ru/mlitary_news/20100713/159797767.html "Defense: Russian Air Force to buy over 60 fifth-generation fighters."] ''RIA Novosti.'' Retrieved: 26 January 2011.</ref> The PAK FA has two internal bays estimated at 4.6-4.7 metres by 1-1.1 metres.<ref name="Air International p34">Butowski 2010, p. 34.</ref> The expected initial armaments include Kh-35UE (AS-20 "Kayak"), Kh-38ME, Kh-58UShKE (AS-11 "Kilter"), and RVV-MD (AA-11 "Archer") missiles.<ref>[http://en.ria.ru/mlitary_news/20120131/171043005.html "Russia to Field Air-Launched Missiles for T-50 by 2014."] ''RIA Novosti''. 31 January 2012.</ref>

Two Izdeliye 810 Extended beyond visual range missiles per weapons bay. Multiple Izdeliye 180 / K77M beyond visual range missiles. K74 and K30 within visual range missiles can also be carried.<ref name="Air International p34"/> Two KH38M or KH58 USHK air-to-ground missiles per weapons bay. Multiple 250–500&nbsp;kg precision guided bombs per weapons bay,<ref name="Air International p34"/> with a maximum of 10 bombs in internal bays.<ref name="Vesti">[http://www.vesti.ru/doc.html?id=351397l "Российский истребитель пятого поколения совершил шесть учебных полетов (in Russian)."] ''vesti.ru.'' Retrieved: 2 April 2010.}</ref> Other possible loads include one 1,500&nbsp;kg bomb per weapons bay or two 400&nbsp;km+ range anti-AWACS weapons (such as the [[R-37 (missile)|RVV-BD]]) on external hardpoints.<ref name=Globalsecurity_PAK_FA>[http://www.globalsecurity.org/military/world/russia/pak-fa.htm "T-50 / Project 701 / PAK FA."] ''GlobalSecurity.org.'' Retrieved: 26 January 2011.</ref><ref>Nekhai, Oleg. [http://english.ruvr.ru/2012/01/31/65019117.html "Russian Navy and Air Force to get new missiles."] ''Voice of Russia'', 31 January 2012.</ref>

PAK FA chief designer Alexander Davydenko has said that there is a possibility of the installation of [[BrahMos]] supersonic missile on the PAK FA and its FGFA derivative. However, it is unclear how these missiles will be installed, though it can be one or two missiles only due to heavy weight of the BrahMos.<ref>{{cite web|title=India planning to Deploy Brahmos on PAK T-50 FGFA|url=http://weapons.technology.youngester.com/2011/03/india-planning-to-deploy-brahmos-on-pak.html|date=12 March 2011|accessdate=4 May 2012}}</ref>

===Engines===
On its first flights, the PAK FA was expected to use a pair of conventional [[Saturn AL-31|Saturn 117S]] engines, but a new engine ''117'' (AL-41F1) powered its first flight.<ref name="NPO Saturn">[http://www.npo-saturn.ru/?act=gm_look&id=1264762617 "NPO."] ''Saturn Press Release,'' 29 January 2010. Retrieved: 26 January 2011.</ref> The new engine features a digital control system ([[FADEC]]), and is reportedly capable of producing 33,000&nbsp;lbs (147&nbsp;kN) of thrust in afterburner, has a dry weight of 1420 kilogram and a thrust to weight ratio of 10.5:1.<ref name="russiandefenseblog.org"/>

According to Sukhoi director Mikhail Pogosyan, the ''117'' (AL-41F1) is a new fifth generation engine built specifically for the PAK-FA. Pogosyan has clarified that claims of the use of an older engine are incorrect. Though the specifics of the new engine remain classified, information provided has included: increased engine thrust by 2.5 tonnes over the AL-31 engine, a reduction in engine weight by {{Convert|150|kg|lb}}. These changes allow the aircraft to [[supercruise]], sustaining supersonic flight speeds without using afterburners.<ref name="russiandefenseblog.org">[http://www.russiandefenseblog.org/?p=942 PAK-FA is flying with new engine already installed]</ref> Mikhail Pogosyan further mentioned that this engine (117) meets the Russian Air Force's requirements and will be installed in production PAK-FA aircraft.<ref name="russiandefenseblog.org"/>

The engine generates a larger thrust and has a complex automation system, to facilitate flight modes such as maneuverability. It is expected that each engine will be able to independently vector its thrust upwards, downward or side to side. Vectoring one engine up with the other one down can produce a twisting force, which would enable the PAK FA to be the first fifth generation fighter with full 3-D thrust vectoring along all three aircraft axes: [[Flight dynamics|pitch, yaw and roll]]. These engines will incorporate infrared and RCS reduction measures.<ref>[http://narod.ru/disk/25867315000/2010.10.09_Smotr-15.avi.html Яндекс.Народ<!-- Bot generated title -->]</ref><ref>[http://www.rian.ru/defense_safety/20100129/206858518.html "Safety."] ''RIA Novosti.'' Retrieved: 26 January 2011.</ref>

There is little information about the new engine of T-50. According to preliminary facts, the engine will have increased thrust and fuel efficiency as compared to AL-41F1. Allegedly, the powerplant will have a thrust of about 107&nbsp;kN in cruise mode and 176&nbsp;kN in full afterburner mode.<ref name="The testing of a new engine intended for PAK FA will be started in 2014">[http://www.ruaviation.com/news/2012/11/15/1341/ "The testing of a new engine intended for PAK FA will be started in 2014".] ''ruaviation.com,'' 15 November 2012. Retrieved: 19 November 2012.</ref>

==Operational history==
[[File:PAK FA T 50 compressor stall on MAKS 2011.jpg|thumb|PAK FA [[compressor stall]] at MAKS-2011]]

In August 2011, the Russian Air Force said that the new Sukhoi fighter is to enter service in 2014–2015. "We will receive a T-50 prototype in 2013," CinC Zelin told reporters. "Mass produced aircraft will not arrive until 2014–2015."<ref name=Rianovosti_2014service>{{cite news |title=Russian first stealth fighter jet 'to enter service in 2015' |url=http://en.rian.ru/mlitary_news/20110816/165826820.html |accessdate=18 August 2011 |newspaper=RiaNovosti}}</ref> Former deputy defense minister [[Vitaly Shlykov]] has questioned Russia's industrial capacity to produce the fighter in significant numbers.<ref>Weir, Fred. [http://www.globalpost.com/dispatch/news/regions/europe/russia/111010/russia%E2%80%99s-military-attempts-building-21st-century-fighter- "Can Moscow regain superpower status? This fighter jet is key"]. ''GlobalPost'', 11 October 2011.</ref>

In March 2013, the first aircraft is to be delivered for two years of state trials.<ref>[http://en.ria.ru/military_news/20121223/178346715.html "Russia’s 5th Generation Fighter Jet to Start State Tests in March"].</ref><ref>[http://www.ruaviation.com/news/2011/8/23/497/ "The testing of PAK FA’s engine are carried out successfully"]. ''Russian Aviation,'' 23 August 2011.</ref> As of June 2012, construction of modernized testing facilities and a new runway to accommodate the next phase of the PAK FA program is underway at the [[929th State Flight Test Center]] in [[Akhtubinsk]].<ref>[http://tvzvezda.ru/news/forces/content/201206202339-hh2o.htm "On the ground in Ahtubinsk build airstrip for testing 5th generation fighter"]. ''tvzvezda,'' 23 June 2012.</ref><ref>[http://www.vahtubinske.ru/news/pak_fa_budet_ispytan_v_akhtubinske/2010-02-01-327 "The PAK FA will be tested in Ahtubinsk"]. ''vahtubinske,'' 1 February 2010.</ref>

On 6 August 2013, the Russian Air Force announced they will take delivery of their first T-50 "in the third quarter of this year," with final state test flights starting in the fourth quarter. The aircraft will enter service in 2016.<ref>[http://www.airrecognition.com/index.php?option=com_content&task=view&id=783 Russian Air Force will take delivery this year of first fifth-generation T-50 fighter aircraft] - Airrecognition.com, 7 August 2013</ref>

===Exports===

Sukhoi claims that the main export advantage of the PAK FA consists in it being cheaper than current US fifth generation jet fighters, though it will be considerably more expensive than previous Russian fourth generation jet fighters.<ref>[http://en.ria.ru/military_news/20100720/159882742.html "Russia's fifth-generation fighter to be cheaper than foreign analogues"].</ref>

Russia was said to be interested in offering the PAK FA for [[Republic of Korea Air Force#F-X Phase 3|South Korea's next generation jet fighter]].<ref>Tae-hoon, Lee. [http://www.koreatimes.co.kr/www/news/nation/2011/07/116_91281.html "Russia seeks to sell stealth jets to Korea"]. ''Korea Times'', 20 July 2011.</ref> South Korea's defence procurement agency confirmed that the Sukhoi PAK FA was a candidate for the [[Republic of Korea Air Force]]'s next-generation fighter (F-X Phase 3) aircraft;<ref>Grevatt, Jon. [http://www.janes.com/products/janes/defence-security-report.aspx?ID=1065930093 "South Korea confirms Sukhoi T-50's surprise entry into FX fighter contest"]. ''Jane's,'' 22 November 2011.</ref> however, Sukhoi failed to enter the bidding competition by the January 2012 deadline.<ref>Lee, Tae-Hoon. [http://www.koreatimes.co.kr/www/news/nation/2012/01/113_103661.html "Russia pulls out of Korea fighter project"]. ''The Korean Times,'' 29 January 2012. Retrieved: 30 January 2012.</ref>

Russia's Centre for Analysis of World Arms Trade predicts that the PAK FA will be available for export in 2025;<ref>[http://indrus.in/articles/2011/09/07/russian_experts_upbeat_about_export_prospects_for_the_pak_fa_12953.html "Russian experts upbeat about export prospects for the PAK FA"]. ''Russia and India Report'', 6 September 2011.</ref> though this may include the [[Sukhoi/HAL FGFA]],<ref>[http://www.ruaviation.com/news/2011/7/28/446/ "Sukhoi: Development of PAK FA is going on without any failures"] ''Russian Aviation'', 28 July 2011.</ref> the primary export version of the base T-50 platform.<ref>Bogdanov, Konstantin. [http://en.ria.ru/analysis/20120709/174500575.html "Russia’s Changing Aircraft Export Strategy"]. ''RIA Novosti'', 9 July 2012.</ref>

Ruslan Pukhov, director of the Centre for Analysis of Strategies and Technologies, has projected that Vietnam will be the second export customer for the fighter.<ref>Johnson, Reuben F. [http://www.cast.ru/eng/?id=372 "Russian think-tank projects additional Su-30, PAK-FA exports"]. ''Jane's'' via cast.ru, 13 May 2010. Retrieved: 26 January 2011.</ref>

In 2012, Russian Defense Minister Anatoly Serdyukov said that Russia and India would jointly build the export version of the T-50 starting in 2020.<ref>[http://en.ria.ru/mlitary_news/20121010/176529011.html "India to Build Export T-50 Stealth Fighter by 2020"]. ''RIA Novosti'', 10 October 2012.</ref>

In 2013 United Aircraft Corporation president Mikhail Pogosyan said that the Russian PAK FA would use the "identical onboard systems and avionics" of the Sukhoi/HAL FGFA.<ref>[http://www.ainonline.com/aviation-news/ain-defense-perspective/2013-03-01/russia-india-describe-next-gen-fighter-plans "Russia, India Describe Next-Gen Fighter Plans"].</ref>

==Variants==

===FGFA===
{{main|Sukhoi/HAL FGFA}}

The completed joint Indian/Russian versions of the single-seat or two-seat FGFA will differ from the current T-50 flying prototypes in 43 ways with improvements to stealth, supercruise, sensors, networking, and combat avionics.<ref>Mathews, Neelam. [http://www.ainonline.com/aviation-news/ain-defense-perspective/2012-05-25/indias-version-sukhoi-t-50-delayed-two-years "India’s Version of Sukhoi T-50 Delayed by Two Years."] ''AIN'', 25 May 2012.</ref>

Sukhoi director [[Mikhail Pogosyan]] has projected a market for 1,000 fighter aircraft over the next four decades, which will be produced in a joint venture with India, 200 each for Russia and India and 600 for other countries.<ref>Bryanski, Gleb. [http://in.reuters.com/article/topNews/idINIndia-46877820100312?sp=true "Russia to make 1,000 stealth jets, eyes India deal."] ''reuters.com.'' Retrieved: 26 January 2011.</ref> He has also said that the Indian contribution would be in the form of joint work under the current agreement rather than as a joint venture.<ref>Mikhail. Kutuzov. [http://en.rian.ru/mlitary_news/20100611/159390947.html "Russian-Indian work on 5G fighter to go ahead without extra deal."] ''rian.ru,'' 11 June 2010. Retrieved: 26 January 2011.</ref> The [[Indian Air Force]] is to receive 50 of the single-seat "Russian version" before receiving the two-seat FGFA.<ref>[http://www.brahmand.com/news/No-JV-with-India-on-fifth-gen-fighter-Sukhoi-chief/4136/1/10.html "No JV with India on fifth-gen fighter: Sukhoi chief."] ''brahmand.com.'' Retrieved: 26 January 2011.</ref> However, the head of the Indian Air Force announced in October of 2012 that the total number of FGFA for the IAF will only be 144, and made up exclusively of the single-seat version.<ref>Luthra, Gulshan. [http://www.indiastrategic.in/topstories1766_IAF_decides_144_fifth_generation_fighters.htm "IAF decides on 144 Fifth Generation Fighters."] ''India Strategic'', October 2012.</ref> The current goal of the IAF is begin introduction of the FGFA in 2020.

===Naval and other versions===
Navalized Sukhoi T-50 PAK FAs will be deployed on the [[Russian aircraft carrier Admiral Kuznetsov|Russian aircraft carrier ''Admiral Kuznetsov'']] and [[List of aircraft carriers of Russia and the Soviet Union|future Russian aircraft carriers]].<ref>Kramnik, Ilya. [http://en.rian.ru/analysis/20100406/158454665.html "Moscow set to upgrade Admiral Kuznetsov aircraft carrier."] ''rian.ru.'' Retrieved: 26 January 2011.</ref> There will be a competition between the Sukhoi, [[Mikoyan]] and [[Yakovlev]] design bureaus to choose the new naval aircraft.<ref name="RMN" />

Alexei Fedorov has said that any decision on applying fifth-generation technologies to produce a smaller fighter (comparative to the [[F-35]]) must wait until after the heavy fighter, based on the T-50, is completed.<ref>[http://arms-tass.su/?page=article&aid=53759&cid=25 "Легкий истребитель 5-го поколения будет создан на базе технологий тяжелого перспективного истребителя (in Russian)".] ''arms-tass.su.'' Retrieved: 26 January 2011.</ref>

===UCAV===
On 30 August 2013, the [[United Aircraft Corporation]] said they were developing an unmanned combat air vehicle based on the T-50 fighter. The drone is currently at a preliminary research stage. Once the fundamental specifications are agreed upon, creating it should be simple with the technology provided by the T-50 program.<ref>[http://en.rian.ru/military_news/20130830/183068603/Russia-Developing-Attack-Drone-From-T-50-Fighter-Jet--UAC.html Russia Developing Attack Drone From T-50 Fighter Jet] - Rian.ru, 30 August 2013</ref> The UCAV version will weight 20 tons and is expected to be unveiled in 2018.<ref>[http://en.rian.ru/military_news/20131003/183921688/Russia-to-See-20-Ton-Combat-Drone-by-2018--Industry-Source.html Russia to See 20-Ton Combat Drone ‘by 2018’] - Rian.ru, 3 October 2013</ref>

==Specifications==
[[File:Т-50 3 views.svg|right|350px]]
Because the aircraft is in development, these specifications are preliminary and are taken as estimates from the available images.

{{aircraft specifications
<!-- if you do not understand how to use this template, please ask at [[WT:Air]] -->
|jet or prop?=jet
|plane or copter?=plane
<!-- Now, fill out the specs. Please include units where appropriate (main comes first, alt in parentheses). If an item doesn't apply, like capacity, leave it blank.
-->
|ref= ''warfare.ru'',<ref name="warfare">[http://warfare.be/?lang=&linkid=2280&catid=255 "PAK-FA Sukhoi T-50."] ''warfare.ru.'' Retrieved: 26 January 2011.</ref> ''pravda.ru''<ref>[http://english.pravda.ru/russia/economics/29-01-2010/111923-fifth_generation-0 "Russia's Fifth Generation Jet Tested Successfully."] ''pravda.ru,'' 29 January 2010. Retrieved: 26 January 2011.</ref>
<!--
General characteristics
-->
|crew=1
|payload main=
|payload alt=
|length main=19.8 m
|length alt=65.9 ft
|span main=14 m
|span alt=46.6 ft
|height main=6.05 m
|height alt=19.8 ft
|area main=78.8 m<sup>2</sup>
|area alt=848.1 ft<sup>2</sup>
|empty weight main=18,500 kg
|empty weight alt=40,785 lb
|loaded weight main=29,772 kg{{#tag:ref|Loaded weight= 18500 kg (empty weight) + 10300 kg (fuel) + 4*190 kg (RVV-SD) + 2*106 kg (RVV-MD){{citation needed|reason=Source needed to support that these numbers are appropriate and accurate.|date=July 2013}}|group=N}} <!-- this should be the typical mission weight -->
|loaded weight alt=65,636 lb
|useful load main=7,500 kg (combat load)
|useful load alt=16,534 lb
|max takeoff weight main=37,000 kg
|max takeoff weight alt=81,570 lb
|more general= '''Fuel capability:''' 10,300 kg (22,711 lb)<ref name="warfare"/>
<!--
Powerplant
-->
|engine (jet)= [[Saturn AL-41|AL-41F1]] for prototypes{{#tag:ref|New engine by NPO Saturn and FNPTS MMPP Salyut to be rated at 175 kN (39,341 lbf).<ref name=vostokstation/>|group="N"}}<ref name=vostokstation>[http://www.vostokstation.com.au/aircraft/Sukhoi_PAK-FA_T-50.htm "PAK-FA T-50."] ''vostokstation.com.au''. Retrieved: 10 April 2012.</ref>
|type of jet= [[turbofan]]
|number of jets=2
|thrust main= 147 kN
|thrust alt= 33,047 lb
|thrust more= for prototypes;<ref name="Air International p35">Butowski 2010, p. 35.</ref> over 175 kN (39,340 lbf) for definitive engine version<ref name="Air International p35"/><ref name="http">{{cite web|url=http://paralay.com/pakfa/pakfa.html|publisher=paralay.com|accessdate=27 April 2013}}</ref>
<!--
Performance
-->
|max speed main= Mach 2+, 2,135 km/h <ref>http://www.aviaport.ru/digest/2006/01/18/99775.html</ref>
|max speed alt= 1,327 mph
|cruise speed main=1,300-1,800 km/h<ref name=vostokstation/>
|cruise speed alt=808-1,118 mph
|ferry range main=5,500 km<ref name=Globalsecurity_specs>[http://www.globalsecurity.org/military/world/russia/pak-fa-specs.htm "T-50 / Project 701 / PAK FA specifications."] ''GlobalSecurity.org.'' Retrieved: 18 January 2013.</ref>
|ferry range alt= 3,417 mi
|combat radius main=
|combat radius alt=
|ceiling main= 20,000 m
|ceiling alt= 65,000 ft
|climb rate main=350 m/s
|climb rate alt= 68,900 ft/min
|loading main= 330-470 kg/m<sup>2</sup>
|loading alt= 67-96 lb/ft<sup>2</sup>
|thrust/weight= 1.01 (1.20 for new engines) <!-- two times the thrust of the engines (147 kN = 33,047 lbf for current, 175 kN = 39,341 lbf for new) divided by loaded weight (65,636 lbs) -->
|more performance= *'''Maximum ''g''-load:''' 9 g<ref name="ruaviation.com"/>
<!--
Armament -->
|guns= None on prototype. Apparent provision for a cannon (most likely [[GSh-301]]).
|hardpoints= Currently 6 internal hardpoints <!-- see talk page --> and up to 6 external hardpoints: two internal bays running longitudinally on the fuselage supporting a total of 4 RVV-BD AAMs (R-37 derived), plus 2 small internal wing bays for 2 RVV-SD AAMs and up to six external hardpoints.<ref name="Photograph">[http://s56.radikal.ru/i151/1009/28/b35f40d5a8f6.jpg "PAK FA R-73 bay concept image"] ''Photograph.'' Retrieved: 26 January 2011.</ref> Including the advanced X-38 air to surface missile.<ref>[http://english.ruvr.ru/2013_01_18/Russian-air-force-puts-X-38-air-to-surface-missile-into-service/ "Russian air force puts X-38 air-to-surface missile into service."]</ref>
|avionics=
*Sh121 multifunctional integrated radio electronic system (MIRES)
**[[N036]] radar built by [[Tikhomirov Scientific Research Institute of Instrument Design|Tikhomirov NIIP]]
***Main X-band N036-1-01 [[Active electronically scanned array|AESA]] radar with 1522 T/R modules
***2 Side facing smaller X-band N036B-1-01[[Active electronically scanned array|AESA]] radars with 358 T/R modules each, to increase angular coverage
***2 L-band N036L-1-01 arrays on the [[Leading-edge extension]] for IFF functionality
**L402 ECM suite built by KNIRTI institute
*101KS electro-optical suite<ref name="Aviation News July 2012 p50">Butowski 2012, p. 50.</ref>
**101KS-O: Laser-based countermeasures against infrared missiles
**101KS-V: IRST for airborne targets
**101KS-U: Ultraviolet warning sensors
**101KS-N: Targeting pod
}}

==See also==
{{Portal|Aviation}}
{{Aircontent
|see also=
* [[Fifth generation jet fighter]]
|related=<!-- designs which were developed into or from this aircraft: -->
* [[Sukhoi/HAL FGFA]]
* [[Mikoyan Project 1.44]]
* [[Sukhoi Su-35BM]]{{#tag:ref|The new fighter's control systems, avionics and cockpit will be designed on the basis of the Su-35BM's systems.<ref name=Globalsecurity_PAK_FA/>|group=N}}
* [[Sukhoi Su-47]]
|similar aircraft=<!-- aircraft that are of similar role, era, and capability as this design: -->
* [[Chengdu J-20]]
* [[Lockheed Martin F-22 Raptor|Lockheed Martin F-22]]
* [[Mikoyan LMFS]]
* [[Northrop YF-23]]
* [[Shenyang J-31]]
|lists=<!-- relevant lists that this aircraft appears in: -->
* [[List of fighter aircraft]]
* [[List of military aircraft of the Soviet Union and the CIS]]
}}

==References==

===Notes===
{{Reflist|group=N}}

===Citations===
{{Reflist|30em}}

===Bibliography===
{{Refbegin}}
* Butowski, Piotr. "Raptorski's Maiden Flight". ''[[Air International]]'', Vol. 78, No 3, March 2010, pp.&nbsp;30–37. Stamford, UK: Key Publishing.
* Lake, Jon. "Sukhoi T-50 - Russia's Raptor?" ''Combat Aircraft'', Vol. 11, No.4, April 2010.
{{Refend}}

==External links==
{{Commons category|PAK FA}}

;General information:
* [http://www.globalsecurity.org/military/world/russia/pak-fa.htm PAK FA - Global Security.org]
* [http://www.grandestrategy.com/2010/02/russian-are-coming-t-50s-flight-to.html The T-50's Flight to the Future - GrandeStrategy]
* [http://www.paralay.com/pakfasu.html PAK FA info & pictures - Paralay.com] {{ru icon}}
* [http://warfare.be/?catid=255&linkid=2280 PAK FA - Russian Military Analysis]
* [http://www.redstar.gr/Foto_red/Eng/Aircraft/Su_T50.html Sukhoi PAK FA - Redstar.gr]
* [http://newstube.ru/media/t-50-texnologii-vzlyota Т-50: технологии взлёта - Technical development video] {{ru icon}}

;News reports and articles:
*[http://www.flightglobal.com/articles/2008/07/15/225495/farnborough-2008-russian-air-force-to-receive-sukhoi-pak-fa-to-be-equivalent-of-the-f-22-raptor.html FARNBOROUGH 2008: Russian air force to receive Sukhoi PAK FA - to be equivalent of the F-22 Raptor]
* [http://articles.timesofindia.indiatimes.com/2007-10-30/europe/27951348_1_generation-fighter-maiden-flight-indo Article from India Times]
* [http://www.flightglobal.com/articles/2007/04/24/213364/picture-russian-sukhoi-t-50-fighter-images-emerge.html Article on Flight International website with artistic image of PAK FA from NPO Saturn (April 04 2007)]
* [http://www.foxnews.com/wires/2008Apr15/0,4670,BrazilRussia,00.html ''Brazil, Russia to build jet fighter'', Associated Press]
*[http://www.ausairpower.net/APA-2010-01.html Australian Analysis of PAK-FA]

'''Flight videos and photos:'''
* {{YouTube|q5DczexaufY|Sukhoi PAK FA - Prospective Airborne Complex of Frontline Aviation }}
* {{YouTube|qxWZiSdWvns|Maiden flight video}}
* [http://www.airliners.net/search/photo.search?aircraft_genericsearch=&airlinesearch=&countrysearch=&specialsearch=&daterange=&keywords=foxbat+%22T-50-%22+-35+-30&range=&sort_order=photo_id+desc&page_limit=30&thumbnails=noinfo Photos of the first and second prototype of PAK FA (Т-50) in flight (2010-2011).]

{{Sukhoi aircraft}}
{{Aviation lists}}
{{Use dmy dates|date=September 2012}}

{{DEFAULTSORT:Sukhoi Pak Fa}}
[[Category:Russian fighter aircraft 2010–2019]]
[[Category:Sukhoi aircraft|PAK FA]]
[[Category:Stealth aircraft]]
[[Category:Twinjets]]

Revision as of 02:05, 5 October 2013

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