China is expected to achieve the first flight of heavy-duty launch vehicles around 2030

On December 7, the Long March 4B carrier rocket sent the China-Brazil Earth Resources Satellite 04 star into space at the Taiyuan Satellite Launch Center. So far, the Long March series of launch vehicles have achieved the 200th launch. Lei Fanpei, chairman of China Aerospace Science and Technology Corporation, said in an interview with Xinhua News Agency that China will complete the 300th launch of the launch vehicle in the next seven years. In addition, the Long March 5 and 7 rockets will also achieve their first flight as soon as possible. The heavy-duty launch vehicle is expected to achieve its first flight around 2030, which can meet the manned landing requirements.

"The ability of the launch vehicle is large, and the stage of China's space flight is large. The size of the carrying capacity determines the level of space application." Li Tongyu, director of the Aerospace Department of the China Academy of Aerospace Science and Technology Launch Vehicle Technology, said that the rocket's carrying capacity and Safety directly determines the performance of satellites, aircraft and other products, and directly demonstrates the aerospace strength of a country.

For the rocket, the ability to carry, the ability to quickly enter the space, and the safety performance are crucial. With the continuous development and advancement of aerospace technology, the future Long March series of launch vehicles are facing a new generation. China has planned the future development spectrum of the Long March series of launch vehicles, and adopted a new type of non-toxic and non-polluting liquid oxygen kerosene and liquid hydrogen liquid oxygen propellant to construct a new generation of large, medium and small launch vehicle development sequences.

Lei Fanpei told reporters that China's new generation of launch vehicle Long March 5 key technology has been broken, is undergoing post-validation work, is expected to achieve the first flight in Hainan launch site within two years. The long-range orbit carrying capacity of the Long March 5 is 25 tons, and the geosynchronous transfer orbit carrying capacity is 14 tons. It is equivalent to the carrying capacity of the international mainstream launch vehicle. It is about twice the maximum carrying capacity of the active Long March series of launch vehicles. Launch large-tonnage low-altitude spacecraft such as space stations and large low-orbit remote sensing satellites.

In addition, the Long March 7 is a medium-sized non-toxic and non-polluting carrier rocket that can carry 13.5 tons of payload into the Earth's near-Earth orbit at a perigee of 200 kilometers, a distance of 400 kilometers, and a dip of 42°. The launch mission is currently at the end of the development phase and it is expected that the first flight test will be conducted next year.

The development of heavy-duty launch vehicles, which support manned missions to the moon, has received much attention. At present, the United States and Russia have restarted the development of heavy rockets. China is also carrying out technological research. "We plan to break through the overall design and key technical research of heavy rockets in four or five years, and then complete the development of heavy-duty launch vehicles, and achieve the first flight around 2030." Lei Fanpei told reporters that according to the plan, China will launch in 2016. Tiangong No. 2 Space Laboratory, and subsequently launched the Shenzhou 11 manned spacecraft and the Tianzhou-1 cargo spacecraft to dock with them to break through and master the space station of the astronauts' mid-term residency, regenerative life support and freight spacecraft supplements. Key technologies to develop space applications of a certain scale. A test core capsule will be launched around 2018.

It is reported that from the April 24, 1970, the Long March 1 rocket successfully launched the Dongfanghong-1 satellite into the low Earth orbit. The Long March series of launch vehicles have completed 200 launches. Among them, the completion of the first 100 launches lasted 37 years, the success rate was 93%. The completion of the second 100 launches lasted only 7 years, with a success rate of 98%, higher than the United States and Russia.

Lei Fanpei said that thanks to the Chinese government's emphasis on space development, especially the traction of a series of major projects, the rocket production capacity has been greatly improved, the test procedures have been reformed, and the launch preparation time has also been shortened. “Especially, we have perfected our management system and put the pursuit of reliability and safety first, ensuring such a high success rate.”

The winner of the von Carmen Award, the highest award in the aerospace field awarded by the International Academy of Astronautics, Liu Jiyuan, former general manager of the China Aerospace Industry Corporation, told the reporter that the Chinese Long March launch vehicle experienced a period from a normal temperature propellant to a low temperature propellant. The technology spans from multiple launches, from series to parallel, from single arrow to one arrow, from load to manned, with different types of satellites and manned spacecraft emitting low, medium and high Earth orbits. Capacity, near-Earth orbit carrying capacity of 8.6 tons, sun-synchronous orbit carrying capacity of 6.2 tons, geosynchronous transfer orbit carrying capacity of 5.5 tons, orbital accuracy at the international advanced level, able to meet the needs of different users Kind of demand. The existing Long March rocket also has the ability to launch spacecraft into the moon and the deep space of the solar system.

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