A fifth-generation fighter is a jet fighter aircraft classification which includes major technologies developed during the first part of the 21st century. As of 2024,[update] these are the most advanced fighters in operation. The characteristics of a fifth-generation fighter are not universally agreed upon, and not every fifth-generation type necessarily has them all; however, they typically include stealth, low-probability-of-intercept radar (LPIR), agile airframes with supercruise performance, advanced avionics features, and highly integrated computer systems capable of networking with other elements within the battlespace for situational awareness and C3 (command, control and communications) capabilities.[1]

As of January 2023,[update] the combat-ready fifth-generation fighters are the Lockheed Martin F-22 Raptor, which entered service with the United States Air Force (USAF) in December 2005; the Lockheed Martin F-35 Lightning II, which entered service with the United States Marine Corps (USMC) in July 2015;[2][3] the Chengdu J-20, which entered service with the People's Liberation Army Air Force (PLAAF) in March 2017;[4] and the Sukhoi Su-57, which entered service with the Russian Air Force (VVS) on 25 December 2020.[5] Other national and international projects are in various stages of development.


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The emerging generation of advanced fighter aircraft in the first decades of the 21st century has come to be known as the fifth generation.[6] The defining characteristics of such a fifth-generation fighter are not universally agreed upon, and not every fifth-generation type necessarily has them all. Some generation counts include more than five leading up to the emerging new generation.[7][8]

In order to minimize their radar cross-section (RCS), most fifth-generation fighters use chines instead of standard leading edge extensions and lack canards, though the Sukhoi T-50 has engine intake extensions that seem to function somewhat like canards, and the Chengdu J-20 designers have chosen the agility enhancements of canards in spite of their poor stealth characteristics.[9] They all have twin canted vertical tails (similar to a V-tail) also to minimize side RCS. Most fifth-generation fighters with supermaneuverability achieve it through thrust vectoring.

All revealed fifth-generation fighters use commercial off-the-shelf main processors to directly control all sensors to form a consolidated view of the battlespace with both onboard and networked sensors, while previous-generation jet fighters used federated systems where each sensor or pod would present its own readings for the pilot to combine in their own mind a view of the battlespace.[10][11][12] The F-22A was physically delivered without synthetic aperture radar (SAR) or situation awareness infra-red search and track. It will gain SAR later through software upgrades.[13] However, any flaw in these complex software systems can disable supposedly unrelated aircraft systems, and the complexity of a software-defined aircraft can lead to a software crisis with additional costs and delays.[14][15] By the end of 2013, the biggest concern with the F-35 program was software, especially the software required for data fusion across the many sensors.[16]

The F-35 uses software-defined radio systems, in which common middleware controls field-programmable gate arrays.[13] Col. Arthur Tomassetti has said that the F-35 is a "software intensive airplane and software is easy to upgrade, as opposed to hardware."[22]

The combination of stealthy airframes, stealthy sensors, and stealthy communications is designed to allow fifth-generation fighters to engage other aircraft before those targets are aware of their presence.[26] Lt. Col. Gene McFalls of the USAF has said that sensor fusion will feed into inventory databases to precisely identify aircraft at a distance.[27]

Sensor fusion and automatic target tracking are projected to give the fifth-generation jet fighter pilot a view of the battlespace superior to that of legacy AWACS (Airborne Warning and Control System) aircraft that may be forced back from the front lines by increasing threats. Therefore, tactical control could be shifted forwards to the pilots in the fighters.[28] Michael Wynne, former Secretary of the United States Air Force, has suggested elimination of the Boeing E-3 Sentry and Northrop Grumman E-8 Joint STARS in favor of more F-35s, simply because so much effort is being made by the Russians and Chinese to target these platforms that are built to commercial airliner standards.[29]

However, the more powerful sensors, such as AESA radar which is able to operate in multiple modes at the same time, may present too much information for the single pilot in the F-22, F-35 and Su-57 to adequately use. The Sukhoi/HAL FGFA offered a return to the two-seat configuration common in fourth generation strike fighters, but this was rejected over cost concerns.[30]

There is ongoing research to apply track-before-detect across sensor fusion in the core CPU to allow fifth-generation fighters to engage targets that no single sensor has by itself detected.[31] Probability theory is used to determine "what data to believe, when to believe and how much to believe".[32]

Gilmary M. Hostage III has suggested that fifth-generation jet fighters will operate together in a "combat cloud" along with future unmanned combat aircraft,[35] and Michael Manazir has suggested that this might come as quickly as loading a UCLASS with AMRAAMs to be launched at the command of an F-35.[36]

According to Lockheed Martin in 2004, the only fifth-generation jet fighter then in operational service was their own F-22 Raptor.[2][40] Lockheed Martin uses "fifth-generation fighter" to describe the F-22 and F-35 fighters, with the definition including "advanced stealth", "extreme performance", "information fusion" and "advanced sustainment".[2][41] For unknown reasons, their definition no longer includes supercruise capability, which has typically been associated with the more advanced modern fighters, but which the F-35 lacks.[42] Lockheed Martin attempted to trademark the term "5th generation fighters" in association with jet aircraft and structural parts thereof,[43] and has a trademark for a logo with the term.[44]

By the late 1990s, several Chinese fifth-generation fighter programs, grouped under the program codename J-XX or XXJ, were identified by western intelligence sources. PLAAF officials have confirmed the existence of such a program, which they estimated would enter service between 2017 and 2019.[54][55] By late 2010, two prototypes of the Chengdu J-20 had been constructed and were undergoing high-speed taxi trials.[56] The J-20 made its first flight on 11 January 2011.[57] On 26 December 2015, a new J-20 with serial number 2101 was seen leaving its Chengdu Aviation Corporation factory. It is believed to be the first of the low rate initial production (LRIP) aircraft.[58] 2101 conducted its maiden flight on 18 January 2016.[59]

The J-20 officially entered training unit service in March 2017,[4] becoming the first operational stealth fighter outside of the United States and in Asia.[60] The J-20 underwent testing and exercises in late 2017,[61] and was inducted into PLAAF combat units in 2018.[62][63]

Another stealth fighter design from SAC started to circulate on the internet in September 2011.[64] In June 2012, photos about a possible prototype of F-60 being transferred on highway began to emerge on the internet.[65] This aircraft was named Shenyang FC-31 later, and made its maiden flight on 31 October 2012.[66] A more refined version of the FC-31 is dubbed "J-35".[67]

In the late 1980s, the Soviet Union outlined the need for a next-generation aircraft to replace its fourth-generation jet fighters, the Mikoyan MiG-29 and Sukhoi Su-27, in front line service. To meet the characteristics for the next-generation aircraft, work was underway on two aircraft projects: the twin-engined delta canard Sukhoi Su-47 with forward-swept wings and the Mikoyan Project 1.44. However, due to the dissolution of the Soviet Union and lack of funds, both remained only as technology demonstrators.

Russia unveiled a prototype of the single-engine Sukhoi Su-75 Checkmate Light Tactical Aircraft in July 2021 at the biennial MAKS (air show), with maiden flight initially expected in 2023 (subsequently delayed to at least 2024). The fighter is mainly designed for export and is expected to be less costly than 2-engine competitors.[78]

India is independently developing a twin-engine fifth-generation supermaneuverable stealth multirole fighter, called the HAL Advanced Medium Combat Aircraft (AMCA). It is being developed and designed by the Aeronautical Development Agency and will be manufactured by a SPV with initial prototypes produced by Hindustan Aeronautics Limited. As of 2022, the AMCA prototype is under construction, with a first flight of the prototype expected by 2025.[79][80][81]

However many analysts have questioned the feasibility of India's ability to independently develop a fifth generation fighter aircraft as India lacks the industrial base and technical capabilities to do so, particularly a lack of research and design expertise.[85] India also lacks a robust military industrial base to manufacture the aircraft in large numbers.[86]

The TAI TF-X Kaan,[89][90] alternatively named TF ("Turkish Fighter"), or in Turkish as Milli Muharip Uak (National Combat Aircraft),[87] abbreviated as MMU,[87] is a stealth, twin-engine, all-weather, fifth generation air superiority fighter in development by Turkish Aerospace Industries (TAI) and BAE Systems as its sub-contractor. The TF-X is planned to replace the F-16 Fighting Falcon aircraft of the Turkish Air Force and to be exported to foreign states. It was officially announced that the TF-X's prototype will be rolled out on 18 March 2023, and make its first flight by the end of 2023.[91][92][93][94][95][96] The taxiing and ground running tests of the prototype began two days before the scheduled roll-out, on March 16, 2023.[87][97][98][99][100] Its maiden flight is scheduled to take place in 2023.[101][102] It was officially given the name "Kaan" on May 1, 2023.[89][90][88] 006ab0faaa

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