China milestone as Long March rockets complete 300 launches
Print Edition
With a Long March-3B rocket putting a new communication satellite into orbit yesterday, China鈥檚 Long March carrier rocket series completed 300 launches, having sent more than 500 spacecraft into space since 1970.
鈥淭his is a milestone for China鈥檚 space industry development,鈥 said Wu Yansheng, board chairman of the China Aerospace Science and Technology Corp (CASC).
The Long March carrier rocket series, developed by the CASC, is responsible for about 96.4 percent of all the launch missions in China.
It took 37 years for the Long March rockets to complete the first 100 launches, 7.5 years to complete the second 100 launches, and only about four years to accomplish the final 100, with the average number of launches per year increasing from 2.7 to 13.3 and then to 23.5.
鈥淚ntensive launches have become normal in China, indicating the rapid development of the space industry, the progress of science and technology and the enhancement of national strength,鈥 said Shang Zhi, director of CASC鈥檚 Space Department.
China joined the space club on April 24, 1970, when the Long March-1 carrier rocket launched the country鈥檚 first satellite, Dongfanghong-1, into orbit. At that time, the carrying capacity of the rocket was only 300 kilograms.
On November 3, 2016, China鈥檚 current largest carrier rocket, the Long March-5, made its maiden flight, with its carrying capacity reaching 25 tons for low-Earth orbit and 14 tons for geosynchronous orbit.
The success rate of the 300 launches of the Long March rockets stood at 96 percent, according to CASC.
During the third 100 launches, the Long March rockets sent a total of 225 spacecraft, weighing about 240 tons, into space, with a success rate of 97 percent, a high level by world standards, said Shang.
From October 1996 to August 2011, the Long March rockets set a world record for 15 years of successful consecutive launches.
In 2018, the Long March rockets completed 37 consecutive launches, ranking a global first for the highest number of successful launches.
A total of 17 types of Long March carrier rockets have been developed and put into use since 1970, ensuring the implementation of a series of key space projects, including manned space program, lunar exploration, BeiDou Navigation Satellite System and the Gaofen Earth observation project.
Studying earthquakes
In addition, the Long March carrier rockets also launched a large number of meteorological satellites, resource satellites and oceanographic satellites, as well as several innovative science satellites, including DAMPE to search for dark matter, the world鈥檚 first quantum satellite and an electromagnetic satellite to study earthquakes, playing an important role in promoting the economic, social and scientific development in China.
Since the 1990s, the Long March rockets have been designed to be compatible with satellites manufactured in the United States, Europe and other countries and regions.
So far, Chinese rockets have launched 56 international commercial satellites and carried more than 20 small satellites or payloads into space for international customers.
The Long March carrier rockets helped provide launch services for countries participating in the Belt and Road Initiative, including Algeria, Pakistan and Saudi Arabia. The services have been extended from launching satellites to the construction of ground facilities, and management and application of the satellites.
From 2015 to 2016, four types of new-generation Long March carrier rockets, using non-toxic and non-polluting propellants, were put into use, greatly improving China鈥檚 capacity of entering outer space.
New technologies such as 3D printing and intelligent manufacturing have been introduced in the development of China鈥檚 new generation carrier rockets. For instance, the Long March-7 is China鈥檚 first carrier rocket completely designed using digital and virtual reality technology 鈥 no paper blueprint was used throughout the design and production process.
The management and production efficiency of the launch vehicles have also been improved. China is now capable of manufacturing more than 40 carrier rockets every year.
The new generation rocket Long March-6 does not require a fixed launch pad and can be ready for takeoff within seven days. The preparation time to launch a Long March-11 rocket can be as short as several hours.
China has made many technological breakthroughs in the development of the Long March-5 rocket, which has also promoted the country鈥檚 industrial manufacturing capacity. Technologies gained from developing the 鈥渉eart鈥 of rockets are helping China, one of the world鈥檚 major coal consumers, use coal more cleanly and efficiently.
鈥淚n China, a large proportion of the grain you eat every day is grown with chemical fertilizers made of materials produced by coal gasification technology transformed from rocket technology,鈥 said Zhu Yuying, vice general manager of the Changzheng Engineering Co, affiliated with the China Academy of Launch Vehicle Technology.
The gasifiers produced by the company can increase the utilization rate of coal from 30 percent to more than 90 percent. And one such gasifier can deal with over 3,000 tons of coal every day.
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