Domestic large aircraft is about to start commercial flight expert interpretation

Domestic large aircraft is about to start commercial flight (expert interpretation)

　　■ Interviewed experts: Xiao Zhixiang, a tenured professor of the School of Aeronautics and Astronautics of Tsinghua University, and the deputy director of the Aircraft Design Institute

　　According to the "Nihon Keizai Shimbun" report, recently, China's domestic large aircraft C919 obtained the type certificate issued by the Civil Aviation Administration of China, taking a big step towards commercial flight.

　　The French "Echo" website reported that after 15 years of hard work, the C919 has recently passed the technical certification of the Chinese authorities.

This is the final stage of delivering aircraft to airlines and starting commercial operations, marking China's entry into the extremely high threshold of modern civil aviation aircraft manufacturing club, which is of historic significance to COMAC and the Chinese aviation industry.

　　The US "Wall Street Journal" website reported that the C919 large passenger aircraft obtained a type certificate, marking a step for Chinese companies to break the monopoly of Boeing and Airbus.

　　On September 29, the Civil Aviation Administration of China issued the C919 large passenger aircraft type certificate to the Commercial Aircraft Corporation of China, which is an important moment in the history of China's civil aviation.

　　Airworthiness certification is a prerequisite for civil aircraft to enter the commercial market. It mainly includes three certificates: first, the design of civil aircraft requires a type certificate; second, the production of civil aircraft requires a production license; It is necessary to obtain a sea trial certificate, that is, a "flight permit".

　　The C919 obtained the type certificate, indicating that China has the ability to develop large passenger aircraft and conduct airworthiness certification in accordance with international airworthiness standards. look forward to.

　　From airworthiness certification to commercial passenger operation, civil aircraft also need to complete the delivery of the aircraft to users and preparation for operation.

COMAC is actively preparing for C919 delivery to users and support operations.

It is believed that in the near future, the C919 will take off with passengers.

　　In recent years, China's commercial flight has made great progress in the areas of certification and test flight, commercial operation, and wide-body passenger aircraft design, and has achieved remarkable results.

　　Forensic test flight.

On May 5, 2017, China's first large jet airliner C919 with completely independent intellectual property rights made its maiden flight.

Since then, C919 has continued to carry out certification and flight test work, and has undergone high-risk and difficult flight test subjects such as stall, minimum ground speed and natural icing.

In August this year, COMAC announced that the C919 had completed the certification test flight.

This is a good preparation for the C919 to obtain a type certificate.

　　business operations.

In July this year, the new regional airliner ARJ21 developed by COMAC successfully transported 5 million passengers.

The safe passenger capacity of 5 million passengers is an important milestone in the safety of commercial aircraft, marking that the safety and reliability of ARJ21 have been fully verified by airlines and the market.

The successful experience of ARJ21 has multiplied the confidence of the Chinese people in domestic commercial aircraft and provided important guidance for the future operation of C919.

　　Widebody aircraft design.

In recent years, the CR929 large aircraft project jointly developed by China and Russia has made great progress.

The flight Mach number of CR929 is higher than that of C919, and the design is more difficult.

With the strong cooperation of the Chinese and Russian engineer teams, the overall plan and detailed design of CR929 have been completed, and the development of the model is being promoted.

　　"Made in China" civil aviation aircraft shows a significant late-mover advantage.

In 2008, China began to independently design commercial aircraft; in 2017, the C919 achieved its maiden flight.

Now, C919 is about to be officially launched to the market.

For more than 10 years, domestic civil aviation passenger aircraft has continuously achieved technological and material innovations on the basis of fully absorbing domestic and foreign aircraft design experience.

In terms of aerodynamic design, traditional aircraft such as Boeing 737 or Airbus A320 adopt a corner cockpit design, while the conformal nose design of the C919 can achieve better drag reduction and noise reduction.

In terms of comfort, the C919's cabin is wider than competing models, and the interior is spacious.

In terms of scalability, the landing gear of the C919 is higher, and it has a strong accommodating capacity for large bypass ratio engines, which can effectively avoid the strong aerodynamic interference between the engine nacelle and the wing caused by the height limit of the fuselage, and ensure the safety of the flight process. sex.

In terms of environmental protection, the C919 adopts a large bypass ratio engine with moderate fuel consumption, and has outstanding environmental protection performance among civil aviation aircraft in the world.

At present, the production autonomy of China's civil aviation aircraft continues to improve.

　　The rapid development of China's commercial flight field is inseparable from the huge demand support from both domestic and international markets.

By the end of 2020, China's general aviation will basically achieve the goal of full coverage of cities above the prefecture level.

Backed by the vast domestic market, China's commercial aviation has huge development opportunities.

In recent years, China's domestic market once occupied 1/5 to 1/4 of the global commercial aviation market, and its importance has become increasingly prominent.

From the perspective of the international market, the current situation of Airbus and Boeing is expected to be broken, and new entrants such as COMAC are becoming strong competitors.

In the future, C919 will "stand out" in the international market, which will open up a new situation for China's civil aviation industry.

　　The C919 still has a long way to go in the future.

In order to adapt to the C919 model, China is accelerating the airworthiness certification of the Changjiang engine CJ-1000A developed by China Commercial Development Co., Ltd.

It is expected that the domestic engine will accelerate the certification, promote the continuous development of domestic commercial aircraft, and realize the full localization of China's commercial aircraft at an early date.

　　(Li Zhuoman interview and finishing)

　　"People's Daily Overseas Edition" (10th edition on October 24, 2022)