China News Agency, Xi'an, May 10 (Reporter Zhang Yichen) At 1:56 on May 10, the Long March 7 Yao-5 carrier rocket ignited and launched at China's Wenchang Space Launch Site, and promoted the Tianzhou-4 cargo spacecraft to the "Tiangong" .

At the same time, the Tianzhou-4 cargo spacecraft is also China's first spacecraft to enter the construction phase of the space station.

　　If the "Shenzhou" series of manned spaceships are passenger trains that travel back and forth between heaven and earth, then the "Tianzhou" series of cargo spaceships are special freight trains between heaven and earth, also known as "space express".

The main task of "Tianzhou" is to transport cargo and replenish propellant for the space station, with a maximum upward cargo carrying capacity of more than 6 tons.

　　In this launch, the Sixth Institute of China Aerospace Science and Technology Corporation (hereinafter referred to as the Sixth Institute of Aerospace Science and Technology) provided all power for the Long March 7 Yao-5 carrier rocket and the Tianzhou-4 cargo spacecraft, and 46 engines escorted the first "Spaceflight" in 2022. Express" to the Tiangong Space Station.

Among them, the Long March 7 Yaowu carrier rocket is equipped with six 120-ton liquid oxygen and kerosene engines and four 18-ton liquid oxygen and kerosene engines. These 10 engines work successively to accurately send the cargo spacecraft into the predetermined orbit.

　　At the same time, the Sixth Academy of Aerospace Science and Technology undertakes the development project of cargo spacecraft propulsion and supplementary systems. It is equipped with a total of 36 space engines with four different thrust levels of 25N, 120N, 150N, and 490N, mainly providing the attitude and orbital maneuvering of cargo spacecraft and assemblies. required impulse, and supplementary propellant for the space station/space laboratory in orbit to extend the space station/space laboratory in-orbit operation time.

　　Wang Wanjun, president of the Sixth Academy of Aerospace Science and Technology, said that in the development of aerospace, power comes first.

All liquid power personnel must do all the preparatory work carefully, create more reliable and excellent power products for manned spaceflight engineering and space station construction, and go all out to ensure the success of the space station construction mission.

　　According to reports, taking the Long March 7 Yao-4 carrier rocket that successfully launched the Tianzhou-3 cargo spaceship as the technical status baseline, the Long March 7 Yao-5 carrier rocket engine has a total of 10 technical status changes.

The R&D team of the Sixth Academy of Aerospace Science and Technology has checked and confirmed the technical status of the engine and conducted special evaluations through multiple ground tests or flight test assessments to ensure that the engine products are in good condition and meet the flight test requirements.

　　According to the Sixth Academy of Aerospace Science and Technology, according to the overall construction plan of the manned space station project, a total of 6 flight missions are planned and implemented during the construction phase of the Chinese space station, namely the launch of the Tianzhou-4 cargo spacecraft, the Shenzhou-14 manned spacecraft, the Wentian experimental cabin, and the dream. Tianzhou experimental module, Tianzhou-5 cargo spacecraft and Shenzhou-15 manned spacecraft.

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