China Air Force: J-20 Stealth Fighter Jet (5th Generation)UnofficialChina December 23, 2019 0 COMMENTS
J-20, nicknamed “weilong”, NATO code name “FIRE FANG” (FIRE FANG). It is the latest generation of the Chengdu Aircraft Industry Group developed for the Chinese People ’s Liberation Army (the old standard in Europe and America is the fourth generation, the new standard and the Russian standard is the fifth generation) double-engine heavy stealth fighters, which are used to replace the third generation of the J-10, J-11 The future heavy fighter model of the air superiority / multi-purpose fighter aircraft will be responsible for the future maintenance of our army’s sovereignty over air and sea. It is expected that the J-20 will be put into use between 2017 and 2019, and will gradually form a combat effectiveness after 2020. The first prototype made its first flight in Chengdu on January 11, 2011.
The J-20 adopts a single-seat, double-engine, full-motion double-vertical tail, DSI drum-type air inlet, and a duck-type aerodynamic layout with an upper anti-duck wing with pointed arches. The nose and fuselage are diamond-shaped, the vertical tail is tilted outwards, the landing gear door is designed with zigzag edges, the fuselage is painted in dark green, and the perspective is almost black. The side bomb bay adopts an innovative structure, which can pre-close the missile launching pylon to the outside, and is equipped with the most advanced new fighting missile in China.
The zeroth batch of the first J-20 verification aircraft was originally scheduled for the first test flight on January 7, 2011, but due to the unsatisfactory weather on that day, it was accompanied by a J-10S fighter aircraft at 12:50 on January 11, 2011 The first flight. The J-20 completed several passes during the first flight.
The test flight ended successfully at 13:05 on the same day. Citizens were allowed to watch from the outside during the whole flight. When they successfully landed, the personnel inside and outside cheered. The first flight of the J-20 caused heated discussions at home and abroad. After the first flight, related personnel performed a ceremony.Participants included the annihilation of the 20th pilot Liang Wanjun, the annihilation of the 10th pilot Lei Qiang, the chief designer of the -20 fighter Yang Wei, and the general director of the General Equipment Department of the People’s Liberation Army General Li Andong.
The first flight of the J-20 coincided with the visit of US Secretary of Defense Robert Gates to China, so its first flight was interpreted by the outside world as China’s show of strength to the United States. But on the night of the first flight, Guan Youfei, deputy director of the Foreign Affairs Office of the Ministry of National Defense of the People’s Republic of China, stated that deciding the test flight time is a normal work arrangement and does not target any country or event.
The flight turned to complex maneuvering flight to test and verify the maneuverability of the aircraft. At the beginning of April 2013, a new generation of close-range air-to-air missiles, the Thunderbolt-10, were mounted on the side magazine of the verification aircraft No. 2002. This was the first time that the J-20 fighter appeared with a weapon. In early July 2013, photos of two new long-range air-to-air missiles mounted on the main magazine of the verification machine No. 2002 were exposed.
On May 12, 2012, the J-20 verification aircraft numbered 2001 flew to the Yanliang test center for test flight. A few days later, the F-20 verification aircraft numbered 2002 successfully flew for the first time. This was the second exposed F-20 verification aircraft. The verification machine 2002 also transferred to Yan Liang in November 2012 and returned to Chengdu in January 2013.
At this time, the test flight of the J-20 has shifted from basic flight to complex maneuver flight to test and verify the maneuverability of the aircraft. At the beginning of April 2013, a new generation of close-range air-to-air missiles, the Thunderbolt-10, were mounted on the side magazine of the verification aircraft No. 2002. This was the first time that the J-20 fighter appeared with a weapon. In early July 2013, photos of two new long-range air-to-air missiles mounted on the main magazine of the verification machine were exposed.
On July 6, 2013, the F-20 verification aircraft numbered 2002 moved to the Yanliang test flight center again to begin the final test flight. The No. 2002 verification machine was the fourth in the first batch, and it was replaced by 2004 at the test flight center. And Yan Liang’s 2001 verification machine replaced the new paint for stealth testing.
At the end of 2013, photos of the first batch of the first J-20 prototypes, numbered 2011, were exposed on the Internet. Compared with the previous verification aircraft, the first prototype of the F-20 was used in painting, cockpit, landing gear hatch, built-in weapon hatch, intake duct, duck wing, side strip, main wing, tail brace, and vertical tail. Significant improvements have been made in the engine nacelle and other areas, and a new electro-optical tracking system (EOTS) has been newly installed under the nose.
Major General Zhu Heping, member of the National Committee of the Chinese People’s Political Consultative Conference and deputy dean of the Air Force Command Academy, said that the 2011 J-20 made a number of improvements to improve engine performance, combat effectiveness and stealth capabilities, and may continue to modify them.
On March 1, 2014, the 2011 J-20 prototype successfully flew for the first time. The first flight was accompanied by a J-10S and passed through the field 4 times. On June 17, 2014, the F-20 prototype of 2011 flew to Yanliang Test Flight Center.
On July 26, 2014, the 2012 J-20 prototype successfully flew for the first time. On October 17, the 2012 J-20 prototype flew to the Yanliang test flight center.
On November 29, 2014, the 2013 J-20 prototype successfully flew for the first time. From this aircraft, the J-20 removed the nose airspeed tube.
On December 19, 2014, the 2015 J-20 prototype successfully flew for the first time. To further reduce drag and weight, the tail brace of the aircraft was slightly modified.
On September 18, 2015, the 2016 J-20 prototype successfully flew for the first time. The aircraft uses a new ejection seat, which uses wave-transmitting materials to redesign the air intake bulge, front wing strips and ventral fins, and extends the engine compartment to enhance the infrared stealth performance at the rear.
On November 24, 2015, the 2017 J-20 prototype successfully flew for the first time. The aircraft modified the cockpit cover and used a new coating to reduce the radar’s scattering from the cockpit cavity structure.
At the end of 2015, the first mass-produced J-20, numbered 2101, went offline and began ground testing.
On January 18, 2016, the J-20 mass production machine numbered 2101 made its first flight.
On November 1, 2016, the F-20 made its first public appearance at the 11th China International Aerospace Expo held in Zhuhai, Guangdong. Around 10:21 a.m. on the 1st, the mass-produced J-20 two-aircraft formation conducted demonstrations of low-altitude pass-through, climb, roll, and roll turns, etc.
In December 2016, the first batch of F-20 production aircraft was delivered to the PLA Air Force.
On March 9, 2017, CCTV confirmed for the first time that the J-20 had served the Chinese People’s Liberation Army Air Force.
On July 30, 2017, the fighter -20 fleet with a dense formation of three aircraft participated in the parade celebrating the 90th anniversary of the founding of the Chinese People’s Liberation Army as the front line of the fighter echelon.
On a certain day in September 2017, a photo of a newly produced J-20 showed (2021) , which was equipped with a brand new China Made engine but had not yet announced the model, or was a WS-10IPE with a low detectability nozzle, and was post-combustion Thrust is 155kN.
On February 9, 2018, the F-20 was installed in the Air Force Combat Forces.
On August 3, 2018, the People’s Daily published a data in the micro-video “Military One Minute” launched by Bayi in that year. The J-20 can battle and cruise for 52 kilometers in 1 minute. This data may suggest that the J-20 The maximum flight speed is 3120 kilometers per hour.
On November 6, 2018, the twelfth Zhuhai Air Show officially opened. At that time, the J-20 will conduct four flight shows on the 6th, 9th, 10th, and 11th, each show time is about 15 minutes. The participation in the air show will be borne by three mass-produced J-20 fighter jets painted with low visibility camouflage paint.
Concept of Design
The J-20 uses full-motion duck wings, vertical tails, and DSI inlets, and has a variety of low-detectability designs: a roughly pentagonal nose and fuselage cross-section, a sharp-edged external double-tailed tail, Zig-zag air-receiving tubing storage compartments, bomb bays and landing gear hatches, coated monolithic canopies, and stealth special coatings are the main features of stealth fighters.
The J-20 verification aircraft used 27% composite materials, the prototype used 20% titanium, and the composite materials used 29%, compared to China’s fourth-generation heavy fighter J-11B, which was only 15% and The level of 9% has been greatly improved. In addition, the J-20 uses international advanced liquid temperature sensing technology and pneumatic servo control technology to replace platinum resistance temperature sensing technology and motor actuation technology, and uses in-situ detection technology of components.
It is also China’s first fighter equipped with an integral canopy. The major development of the transparent cabin cockpit was started in 2010. The development team proposed a “gradual suspension + vacuum assisted” process to achieve the overall cabin pod formation, mosaic transition edge connection, flexible suction positioning, high-precision hole processing, and uniform curved surface uniformity.
A series of technologies such as film plating have made China the second country after the United States to have the ability to develop such transparent parts.
The J-20 is about 21 meters long and has a wingspan of about 13.8 meters. It is speculated that it can provide a large space for the built-in bomb and oil tanks. Due to the large fuel payload, it is more suitable for voyages. Because of its larger body, it is speculated that it should be matched with a larger thrust engine, or prepare for future upgrade space.
The design layout of the J-20 does not use the conventional layout of the US F-22 and the Russian Su-57. Instead, it uses a double-eddy vortex lift body-side strip-winged aerodynamic layout, similar to a typhoon fighter. Excellent supersonic trimming ability, good high attack angle lift characteristics, high instantaneous hovering angular velocity and roll rate. However, the biggest disadvantage of the duck layout is the contradiction between the maximum attack angle and the cruise continuous attack angle lift-drag ratio, and the double-edged eddy current can balance this defect.
In addition, when the duck wing is deflected, a strong radar echo is generated, which affects the forward RCS of the aircraft more than the conventional layout aircraft. The shape of the aircraft has a better low detectable design, but the stealth treatment of the tail nozzle is not as good as the F-22. According to its thinking of strengthening the high-speed breakthrough capability, it is expected that the aircraft may have a key tactical purpose of anti-intervention and seizure of air power.
According to an official report on November 12, 2016, the J-20 will be equipped with a helmet sight with a Thunderbolt-10 combat short-range missile in the future, which can carry out shoulder-to-side attacks.
|Type||5th generation fighter|
|First flight||12:50 on January 11, 2011|
|Manufacturer||Chengdu Aircraft Industry Group|
|Production||8 prototypes (experimental and test models)
55+ mass production machine (service model)
|Unit cost||Approximately $ 120 million (2017)|
|Length||21 m (69 ft)|
|Span||13.88 meters (45.5 feet)|
|Height||5 meters (16 feet)|
|Engine||Engine AL-31F × 2 (prototype)
WS-10 × 2 (transition type)
WS-15 × 2 (complete type)
|Thrust||Maximum military thrust: 74KN / 89KN / 105KN
Maximum after burning thrust: 123kN / 135kN / 181KN
|Empty Weight||19.4 metric tons (42,750 pounds)|
|Max Load||12 metric tons (26,000 pounds)|
|Normal Takeoff Weight||31 metric tons (68,000 pounds)|
|Takeoff Weight||37,000 kg (82,000 pounds)|
|Maximum flight speed||Mach 2.0, Cruising speed Mach 0.84|
|Maximum range||7,800 km, 6,500 km @20 tons load, 4,500 km @40 tons load|
||20,000 meters (66,000 feet)|
|Combat radius||greater than 2,000 kilometers (1,200 miles)|
|Maximum overload||− 3 G/ > 9 G|
|Takeoff Distance||700 meters (2,300 feet)|
|Missile||Thunderbolt-10 short-range air-to-air missile
Thunderbolt-15 long-range air-to-air missile
Thunderbolt-21 long-range air-to-air multipulse missile
|Bomb||Thunderstone-6 Precision Guided Bomb
Other infrared tracer foil interference bombs, front side
|Other||Rear-view radar scattering cross section
RCS <0.028 to 0.35 square meters (0.30 to 3.77 square feet)