2020-09-20

China’s manned landing on the moon is adjusted, and the 921 rocket becomes the main force, which may achieve its goal before the United States

By yqqlm yqqlm

On November 24 this year, my country will launch the Chang’e-5 lunar probe with the Long March 5 at the Wenchang Space Launch Center. Sampling returns. The ultimate goal of my country’s lunar exploration is to manned landing on the moon and establish a base on the moon. However, to achieve manned landing on the moon, it is far from enough to rely solely on the current Long March 5, and a more powerful launch vehicle is needed. Previously, the manned moon landing rocket planned by our country has Long March 9 and 921 rocket, but at the recently opened 2020 Space Conference, this plan was adjusted.

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This year’s Space Conference adjusted China’s manned moon landing plan

According to media reports, at this year’s Space Conference, the latest vision report on China’s manned landing on the moon was released. The most important part is the direct launch of the new generation of carrier rockets commonly known as the 921 rocket. The banner of China’s manned landing on the moon has been raised, and the Long March 9 that was originally expected to have disappeared in the latest version of the plan.

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921 rocket replaced Long March 9 to carry the banner

Long March 9 is a behemoth with a low-Earth orbit carrying capacity of 188 tons, and an LTO moon orbit carrying capacity of 65 tons, surpassing the US”Saturn 5″ that year. The low-Earth orbit carrying capacity of the new 921 rocket is only about 70 tons, and the LTO orbital carrying capacity is no less than 25 tons. From the data point of view, the gap between the two is huge.

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The biggest one is Long March 9th, which is much larger than Long March 5

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Compared between the new 921 rocket and the Long March 9th, it is still smaller

However, it is such a huge capacity that makes the development of Long March 9 difficult. So far, it has only completed the 500-ton liquid oxygen kerosene engine gas generator and gas generator on March 24, 2019. The turbo pump linkage test, other parts are still being explored. At present, the first-stage principle prototype of the 921/921H rocket has been developed. The seven YF-100K engines of the core stage and booster have completed the long-distance test of 300S. The second-generation upper-stage YF-75D expansion cycle hydrogen-oxygen engine Has long been successful. The first flight is expected in the fall of 2022, and it may be postponed in 2025. In 2024, the launch of the Tiangong Space Station platform will be available. Capability, China is expected to achieve a manned moon landing in 2030, and at that time, if the Long March 9 develops smoothly, it may have just conducted its first test launch.

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New 921 rocket

So in order to ensure progress, the new 921 rocket is the best choice. Moreover, the design concept of the new 921 rocket is closer to Musk’s”Falcon” 9 rocket, taking the recyclable route, which can effectively reduce the cost of delivery. At the same time, it has been confirmed that the second and third-stage storage tanks of the new 921 rocket have been confirmed as common bottom tanks. Together with its 21-round parallel and CBC configuration, it is closer to its”world advanced level” blueprint. The design concept of the Long March 9 is closer to traditional launch vehicles and is more suitable for manned landing on Mars in the future.

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New 921 rocket imagination

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Long March 9 is still waiting for the manned landing project on Mars

Of course, because of the new 921 rocket The carrying capacity is far inferior to that of the Long March 9, so China’s manned lunar landing plan has also been adjusted. The lunar module and the new manned spacecraft are respectively launched into the lunar orbit, and then they are docked in the lunar orbit, and the astronauts are transferred in. In the lunar module, the spacecraft is on standby. The lunar module landed on the moon and returned, docked with the spacecraft again in the lunar orbit, and transferred the astronauts. Finally, the new manned spacecraft ignited and returned to the earth. The first manned moon landing does not consider establishing a space station around the moon.

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China Manned Moon Landing Project

As for the new generation of manned spacecraft flying to the lunar orbit, it is actually the same type as the new generation of manned spacecraft test ship successfully launched on May 5 this year. They are all modularized. Some new modules are added on the basis of the low-Earth orbit spacecraft. However, it can be seen from the PPT of this space conference that the appearance of the manned spacecraft flying to the lunar orbit has changed significantly, and the original escape tower disappeared. There are four stabilizer wings, and there are faintly visible engine nozzles under the stabilizer, which means that it may change from the traditional escape tower escape mode to SpaceX manned”Dragon” spacecraft and Boeing CST-100″self” This is a major change that deserves attention.

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China’s new generation of manned spacecraft, the appearance of the moon landing version has changed again

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Manned spacecraft in active service around the world

Of course If the development of the new 921 rocket cannot be completed on time, we still have a backup plan, which is to use the current Long March 5. However, although Long March 5 is currently the world’s third largest active-service thrust heavy launch vehicle, its low-Earth orbit carrying capacity is only The 25-ton level and the simultaneous transfer orbital carrying capacity is only 14-ton level. Therefore, the lunar module and the new manned spacecraft can only be transported to the lunar orbit little by little. Just like ants moving, the complexity and difficulty will exceed”Lunar Express” built by the new 921 rocket.

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The current Long March 5 can also carry out manned missions to the moon, but the ants must move

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China’s manned lunar module

According to the information revealed by this space conference, the three key questions of what rocket to use, what spacecraft to use, and how to land on the moon are basically clear. This is the most important way to”how fast and save” manned moon landings. Best path. If the development of a traditional one-time heavy rocket to land on the Moon Long March 9 is for the sake of large and complete, it will slow down the entire progress. With the current plan, as long as the Americans delay the return of SLS to the moon for another three to five years, perhaps we will achieve our goal before the United States.

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The determination of the 921 rocket may enable my country to achieve its goal before the United States returns to the moon