The Chinese Stealth Fighter J-20 "Annihilator Twenty" is a fifth generation, twin engine stealth fighter aircraft built by Chengdu Aircraft Group for the Chinese PLA Air Force. In late 2010, the J-20 underwent high speed taxiing tests. The J-20 made its first flight on 11 January 2011. The Deputy Commander of the People's Liberation Army Air Force said that he expected the J-20 to be operational in 2017–2019. The J-20 was one of the Chinese stealth fighter programs under the codename J-XX that was launched in the late 90s. It has been also designated “Project 718”. The J-20 is a single-seat, twin-engine aircraft which appears to be somewhat larger and heavier than the comparable Sukhoi T-50 and Lockheed Martin F-22 Raptor. It is estimated that it is approximately 75 feet in length, has a wingspan of 45 feet or more, and is expected to have a takeoff weight of 75,000 to 80,000 pounds with internal stores only. The prototype could be powered by twin 32,000 pound thrust Saturn 117S engines provided by Russia. Chinese sources have claimed that production aircraft will be powered by two 29,000 pound thrust WS-10 class high thrust turbofan engines fitted with Thrust Vector Controlled nozzles, both made in China. Pentagon spokesman Col. David Lapan has said that one of the signs of problems in the development is that China is still seeking engines from Russia for the aircraft. The J-20 may have lower supercruise speed (yet greater range) and less agility than a Lockheed Martin F-22 Raptor or PAK FA, but might have larger weapon bays and carry more fuel. The J-20 has a long and wide fuselage and low jet engine intakes with a forward chine, a main delta wing, forward canards, a bubble canopy, conventional round engine exhausts and canted all-moving fins. The front section of the J-20 is similarly chiseled as the F-22 Raptor and the body and tail resemble those of the Sukhoi T-50 prototype. As early photographs of the prototype surfaced the design may suggest a large, long range ground attack aircraft, not unlike a "stealth version" of the General Dynamics F-111 Aardvark.It is noted that the canard-delta configuration with canted vertical fins appears to resemble a MiG. It is suspected that cyberespionage may have assisted the development of the J-20, with information used by subcontractors of Lockheed Martin for the F-35 project in particular having been significantly compromised during development of the J-20. The J-20 has a pair of all-moving tailfins that are swept back in the F-35 style instead of being trapezoid like the F-22 and PAK-FA tails and ventral stabilizing fins. It also has an F-22 style nose section, but with F-35 style dropped nose, forward swept intakes with "diverterless" supersonic inlet (DSI) bumps and a one-piece canopy.

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