China News Service, Xi'an, March 22 (Reporter Zhang Yichen) The reporter learned from the Sixth Institute of China Aerospace Science and Technology Corporation (hereinafter referred to as the Sixth Institute of Aerospace Science and Technology) on the 22nd that the calibration test of the last high-thrust hydrogen-oxygen engine of the Long March 5B Yao-4 carrier rocket Success.

The test starts according to the predetermined procedure, the main stage works for 100 seconds, and shuts down according to the predetermined procedure. The test system works normally, the engine parameters are normal, and the function and performance of the high-thrust hydrogen-oxygen engine meet the overall technical requirements of the rocket. The rocket will be delivered to the final assembly, and the space station experiment will be performed this year. pod launch mission.

　　According to reports, the various sections of the space station, manned spacecraft, cargo spacecraft, relay satellites and the Long March series of launch vehicles used in the China Space Station project are all developed by China Aerospace Science and Technology Corporation.

　　This type of high-thrust hydrogen-oxygen engine is used in the core stage of the Long March 5 series of launch vehicles.

In 2022, the Long March 5 series of carrier rockets will carry out the launch missions of the Wentian experimental module and the Mengtian experimental module of the space station.

This type of hydrogen-oxygen engine works for about 500 seconds in the actual flight mission.

　　The purpose of calibration test (ie calibration test) is to obtain the relevant parameters of the "God" engine and to expose possible problems in advance.

To reduce the impact on engine life, set the calibration run time to 100 seconds.

In addition, the development team conducted a long-term test run of more than 500 seconds for other engines of the same model to verify their performance and indicators from the side.

　　From Dongfanghong-1, which opened China's road to space exploration, to manned spaceflight, Beidou networking, to Chang'e lunar exploration, and Mars exploration, for more than half a century, the Sixth Institute of Aerospace Engineering has made breakthroughs from conventional propellants to high-energy and low-temperature propellants , a series of key and core technologies of liquid rocket engines with thrust ranging from millinewtons to 480 tons, and constantly promote the Long March series of launch vehicles to fly to the sky.

　　It is understood that in 2022, China will successively launch the Tianzhou-4 cargo spacecraft, the Shenzhou-14 manned spacecraft, the Wentian experimental module, the Mengtian experimental module, as well as the Tianzhou-5 cargo spacecraft and the Shenzhou-15 manned spacecraft. Spacecraft, complete the orbital construction of the space station, and build a national space laboratory that operates stably in orbit.

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