China News Service, Chengdu, January 9th (Liu Zhongjun, Xu Bo, Yangliu) In January 10 years ago, a black-painted, sci-fi-shaped plane was quietly parked on the take-off line of an airport in Chengdu, with crews surrounding it. Making the final preparations before take-off, the audience stand not far away was full of people, and everyone was waiting eagerly. The cold winter seemed to be unable to stop everyone's enthusiasm.

The J-20 soaring in the sky.

Photo by Chen Xiao

　　The test pilot took the flight release form from the maintenance and solemnly wrote the word "first flight" on the test flight subjects.

After checking around the plane, the test pilot boarded the plane.

With the first flight instruction issued by the project chief commander, the engine made a huge roar instantly, and the aircraft dragged a long tail flame, roaring past countless pairs of eyes.

Accelerate, accelerate again, in the blink of an eye, the plane roars into the sky like a bolt of lightning, and soars into the sky.

Turn, pass at low altitude, turn again, pass at low altitude...

The J-20 aircraft was displayed at the air show.

Photo by Yue Shuhua

　　Above the airport runway, the plane is like a mighty and domineering warrior returning in a triumph. From far and near, a dragonfly touches the water. The rear wheel wipes out two white smoke rings on the runway, and the front wheel presses firmly on the runway line at the same time, landing safely. .

China's first four-generation aircraft with independent intellectual property rights, the J-20, made its first flight successfully, and the time was fixed at 13:11 on January 11, 2011.

The J-20 aircraft that debuted at the Zhuhai Air Show in 2016.

Photo by Shen Feng

　　Entering the new century, the fourth-generation fighter jets, featuring stealth, supersonic cruise, super-maneuverability, beyond-horizon air combat, integrated avionics, and self-support, and many other new technologies as typical features, have become a weapon for mastering aerial victory. Fighter development and construction work.

In the pre-research, demonstration and iterative process, the aviation industry has successively completed the determination of the four-generation aircraft overall plan, proposed the process and manufacturing technology research projects, completed the design and manufacture of related functional samples, and completed the fourth-generation aircraft 1:1 Full-scale display prototype manufacturing.

Digital collaboration platform, 3D simulation design and assembly, embedded main weapon magazine, and a series of forward-looking explorations have laid a solid foundation for subsequent development.

The J-20 aircraft at the Zhuhai Air Show.

Photo by Yue Shuhua

　　With the formal establishment of China's fourth-generation aircraft development project, named as the J-20 aircraft, in the face of huge technological cross-generation pressure and urgent development cycle, aviation people embark on a journey that has never been done before.

　　In the initial stage of development, in order to improve the quality of development, shorten the development cycle, and improve the level of project management, the chief engineer system decided to adopt full three-dimensional digital design/manufacturing/management technology in the development of new machines.

Compared with the two-dimensional publishing model, the fully digital three-dimensional publishing model has a completely different design platform, and there are many unexpected difficulties.

"The steep technological steps, the pressing time for publishing pictures, and the many uncertain factors are bound to be the difficulties that lie in front of us. It is these difficulties that provide a platform to reflect the value of our existence. I firmly believe that we have'knowledge There is a tiger in the mountains, and the spirit of leaning towards tigers and mountains, and with the wisdom to overcome difficulties, we will and should cherish this hard-won opportunity and stand the test of the times." At the beginning of the design, chief designer Yang Wei's article "The fragrance of plum blossoms comes from the bitter cold" quickly ignited the passion of designers.

In just a few months, the all-digital digital-analog design of the entire body structure of the J-20 verification aircraft was completed and the drawings were officially released.

Aircraft hatch test site.

Photo by Zhu Peng

　　In order to speed up the trial production progress, process design and product design were carried out in parallel, and the development team started the first part manufacturing only 7 days after the digital model was issued, and then the verification machine body structure was fully transferred to the trial production stage.

However, a large proportion of new materials, large-size structural parts, and processing requirements for stealth characteristics have brought challenges to the development of the F-20.

Aiming at the characteristics of the fully digital design of the F-20 verification aircraft, the aviation personnel have continued to innovate, enterprising, and experienced skills, and have successively broken through a series of key technologies.

The key parts were successfully trial-produced once, the large components were successfully assembled once, and the engine was unsealed and started up once.

　　In order to guard every node of the J-20 aircraft, whether it is day or night, as long as everyone is on call, a large number of advanced and typical figures continue to emerge in various fields of design, testing, manufacturing, and flight testing.

J-20 aircraft engine test site.

Photo by Zhu Peng

　　The first flight was successful, only the first step was completed.

Subsequently, the aircraft achieved the best ergonomics in the cockpit, with a scientific weight reduction of 200 kg.

Overcome the overall frame manufacturing known as the "Leap Frame", and then break the record of the "Asia's No. 1 Frame", so that important results can be achieved in a short time for testing, flight testing, and finalization.

At the same time, with the close coordination of hundreds of research and development units inside and outside the electronics industry, the performance of the F-20 aircraft has continued to improve.

　　In the past 10 years, from the first flight to the public appearance at the Zhuhai Air Show, the sword "Zhu Rihe" to the armed forces, the J-20 aircraft has achieved the leap from the third generation to the fourth generation in the development of my country's aviation industry and the construction of aviation weapons and equipment.

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