| J-20 flight at the 2022 Changchun Air Show | |
| Role | Stealth air superiority fighter |
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| National origin | China |
| Manufacturer | Chengdu Aerospace Corporation |
| First flight | 11 January 2011; 13 years ago |
| Introduction | 9 March 2017 |
| Status | In service |
| Primary user | People's Liberation Army Air Force |
| Produced | 2009–present |
| Number built | 210~250+ (as of 2023) |
| Developed from | J-XX |
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The J-20 has a long and blended fuselage, with a chiseled nose section and a frameless canopy. Immediately behind the cockpit are low-observable diverterless supersonic inlet (DSI) intakes. All-moving canard surfaces with pronounced dihedral are placed behind the intakes, followed by leading edge extensions (LERX) merging into the delta wing with forward-swept trailing edges. The aft section has twin outward canted all-moving fins, short but deep ventral strakes, and conventional or low-observable engine exhausts.[64][65]
One important design criterion for the J-20 is high instability. This requires sustained pitch authority at a high angle of attack, in which a conventional tail-plane would lose effectiveness due to stalling. On the other hand, a canard can deflect opposite to the angle of attack, avoiding stall and thereby maintaining control. A canard design is also known to provide good supersonic performance, excellent supersonic and transonic turn performance, and improved short-field landing performance compared to the conventional delta-wing design.
Leading edge extensions and body lift are incorporated to enhance performance in a canard layout. This combination is said by the designer to generate 1.2 times the lift of an ordinary canard delta, and 1.8 times more lift than an equivalent-sized pure delta configuration. The designer claims such a combination allows the use of a smaller wing, reducing supersonic drag without compromising transonic lift-to-drag characteristics that are crucial to the aircraft's turn performance.
Ceiling
MAX RANGE
Aircraft Speed
Max Crew
Analysts noted that the J-20's airframe employs a holistic approach to reduce its Radar cross-section (RCS), uniquely combining canard wings with leading edge root extensions (LERX). The chined forebody, modified radar radome, and electroconductive canopy use a stealth shaping, yielding signature performance in a mature design similar to the F-22.
On 10 December 2010, the first J-20 prototype was observed undertaking high speed taxiing tests around the Chengdu Aircraft Design Institute (CADI) facilities before the maiden flight.
On 10 May 2012, the second prototype (numbered "2002") underwent high-speed taxiing tests, and flight testing that began later that month On 20 October 2012, photographs of the prototype with open compartment doors and a modified pitot tube emerged,