News from CCTV: At 13:56 on December 3, Beijing time, my country used the Long March 3B carrier rocket at the Xichang Satellite Launch Center to successfully launch the communication technology test satellite No. 13. space, the satellite successfully entered the scheduled orbit, and the launch mission was a complete success.
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The satellite is mainly used for satellite communications, radio and television, data transmission and other services, and carries out relevant technical test verification. This mission is the 549th flight of the Long March series of launch vehicles.
The Long March 3B rocket completed its 100th launch: What key technologies did the Long March 3B rocket break through?
The communication technology test satellite No. 13 The successful launch also marked the Long March 3B rocket becoming the first rocket in my country to complete 100 launches of a single model. The Long March 3B rocket is also the type of rocket that has been launched the most frequently in my country so far. So, what are the advanced design concepts and key technologies of Long March 3B, and how does it lead the development of my country's new generation launch vehicle? Let’s find out together.
The Long March 3B rocket has adopted the design ideas of generalization, serialization and combination from the design stage, that is, designing different rocket modules and splicing and combining different modules to form a new rocket. , this model, which astronauts call the "three modernizations", has important guiding significance for the subsequent development of the Long March series of rockets.
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Long Lehao, academician of the Chinese Academy of Engineering and the first commander-in-chief and chief designer of the Long March-3A series launch vehicle, said: "It is a benchmark, which is reliable, cost-effective and fast. Its function has actually been used in our It is included in the new generation of launch vehicles, including the current Long March 5, 6, 7, and 8 (etc.)”
Long Lehao introduced that the third-stage rocket of the Long March 3B uses a low-temperature hydrogen-oxygen engine. This technology is very difficult. When consuming the same unit of fuel, the thrust of the hydrogen-oxygen engine is greater. Breaking through this technology is very important for our country. The development of a new generation of launch vehicles is of great significance. The hydrogen-oxygen engine technology used in rockets such as Long March 5, Long March 8, and Long March 7 all originated from this.
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Long Lehao said that in this sense, it has played a decisive and key role in helping China's Long March series of rockets reach the first echelon of launch vehicles in the world.
