Chinese J-20 Stealth Fighter, is considered to be the world's most advanced stealth jet by Chinese Airspace Corporation Chengdu. It has now officially joined the Chinese PLAAF.
The Chengdu J-20 (simplified Chinese: 歼-20; traditional Chinese: 殲-20) is a stealth, twinjet, fifth-generation fighter aircraft developed by China's Chengdu Aerospace Corporation for the People's Liberation Army Air Force (PLAAF). The J-20 made its first flight on 11 January 2011, and entered initial operational capability phase in March 2017, according to state media.
On 11 January 2011, the J-20 made its first flight, lasting about 15 minutes, with a Chengdu J-10S serving as the chase aircraft. After the successful flight, a ceremony was held, attended by the pilot, Li Gang, Chief Designer Yang Wei and General Li Andong, Deputy-Director of General Armaments. On 17 April 2011, a second test flight of an hour and 20 minutes took place. On 5 May 2011, a 55-minute test flight was held that included retraction of the landing gear.
On 26 February 2012, a J-20 performed various low-altitude maneuvers. On 10 May 2012, a second prototype underwent high speed taxiing tests, and flight testing that began later that month. On 20 October 2012, photographs of a new prototype emerged, featuring a different radome, which was speculated to house an AESA radar. On March 2013, images of the side weapon bays appeared, including a missile launch rail.
On 16 January 2014, a J-20 prototype was revealed, showing a new intake and stealth coating, as well as redesigned vertical stabilizers, and an Electro-Optical Targeting System. This particular aircraft, numbered '2011', performed its maiden flight on 1 March 2014 and is said to represent the initial pre-serial standard. By the end of 2014, three more pre-serial prototypes were flown: number '2012' on 26 July 2014, number '2013' on 29 November 2014 and finally number '2015' on 19 December 2014.
On 13 September 2015, a new prototype, marked '2016', begun testing. It had noticeable improvements, such as apparently changed DSI bumps on the intakes, which save weight, complexity and radar signature. The DSI changes suggested the possibility of more powerful engines being used than on its predecessors, likely to be an advanced 14-ton thrust derivative of the Russian AL-31 or Chinese Shenyang WS-10 turbofan engines, though, by 2020 the J-20 is planned to use the 18-19 ton WS-15 engine, enabling the jet to super-cruise without using afterburners. The trapezoidal flight booms around the engines were enlarged, possibly to accommodate rearwards facing radars or electronic jamming equipment. The fuselage extends almost entirely up to the engine's exhaust nozzles. Compared to its "2014" and "2015" predecessors, the J-20's fuselage contains more of engine's surface area inside the stealthy fuselage, providing greater rear-facing stealth against enemy radar.
In November 2015, a new J-20 prototype, numbered '2017', took to the sky. The most significant change in the new prototype is the reshaped cockpit canopy, which provides the pilot with greater visibility. The lack of other design changes suggest that "2017" is very close to the final J-20 production configuration. Since '2017' is likely the last J-20 prototype, low rate initial production of the J-20 is likely to begin in 2016. It has been reported that the design of J-20 is already mature and will not directly use the 117S engine.
In late December 2015, a new J-20 numbered 2101 was spotted; it is believed to be the low rate initial production (LRIP) version of the aircraft. That aircraft performed its maiden flight on 18 January 2016.
At least six J-20s are in active service, with five tail numbers 78271-78275 identified. Another six were believed ready to be delivered by end of Dec 2016. On 9 March 2017, Chinese officials confirmed that the J-20 had entered service in the Chinese air force.
Source / More Info: https://en.wikipedia.org/wiki/Chengdu_J-20
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