"The Long March 5 Day comes with important responsibilities." On Thursday, the Sixth Academy of Aerospace Science and Technology successfully organized and implemented the "Long March 5 Yao-6 Launch Vehicle" high-thrust hydrogen and oxygen engine 100-second ground calibration test, engine function and performance If the overall requirements of the rocket are met, the final rocket assembly will be delivered later.
Long March 5 Yao 6 hydrogen and oxygen engine calibration test
When will the Long March 5 Yao 6 rocket be launched?
At present, it is known that the Wentian experimental module of the Tiangong Space Station will be launched by the Long March 5B Yaosan rocket, and the Mengtian experimental module of the Tiangong Space Station will be launched by the Long March 5B Yaosi rocket. The engine used in this test run is the "Long March 5 rocket". Obviously, it has nothing to do with the above two missions. It is known that the payloads that need to be launched using the Long March 5 rocket are Chang'e 6 , Chang'e 7, Chang'e 8 .
So, is the Long March 5 Yao 6 used to launch the Chang'e series detectors? This has to be analyzed starting from the meaning of "calibration test run" .
Chang'e-6 will make adaptive improvements based on the Chang'e-5 backup
The engine products we see on the screen for the official launch mission of the launch vehicle are usually not brand-new products. These engines will be pulled before performing the flight mission. Go to the test bench to conduct a short-range calibration test to test the reliability of the product under working conditions. In order to avoid excessive loss of engine life, random inspections will also be carried out among the same batch of products, that is, an engine will be randomly selected for a full test run to confirm the reliability of the flight products from the side.
Products that have completed calibration and test runs and meet various data standards will soon be assembled on rockets that perform flight missions.
The Long March 5 Yao-4 rocket that carried out the Tianwen-1 launch mission
The Long March-5 Yao-4 rocket that previously carried out the Tianwen-1 Mars probe launch mission completed its calibration test run, and was still approximately 30 kilometers away from carrying out its official flight mission. Half a year.
Three months ago, the Long March 5B Yaosi rocket also completed the calibration and test run of the last engine. At that time, it was seven months before the rocket carried out the launch mission of the Mengtian experimental module .
The engine used by the rocket on the launch tower is not a new product
According to the convention of these two missions, the time interval between completing the calibration test and executing the official flight mission is about half a year, which means that Long March 5 Yao 6 will perform the flight mission The time should be the second half of this year or the first half of next year. Obviously, none of the currently known Chang'e series detectors can catch up with this rocket shuttle.
What payload will the Long March 5 Yao-6 rocket be used to launch, which is neither used in the manned space project nor the Chang'e lunar exploration project?
The Long March 5 is a large rocket with great high-orbit capacity advantages.
The Long March 5 series rockets have a geostationary transfer orbit capacity of 14 tons. This capacity index can rank among the top three among all types of active rockets in the world. Near-Earth The orbital transport capacity is no less than 22 tons, and it is also at the forefront of all types of active rockets in the world.
The "big brother" of the new generation of non-toxic and pollution-free launch vehicles is obviously the Long March 5 series, which is responsible for transportation capacity. This series of rockets includes two models, namely the Long March 5 and the Long March 5B. People are accustomed to calling the latter "Long March 5B".
The Long March 5B rocket is dedicated to low-Earth orbit large-tonnage spacecraft launch missions
The Long March 5 series rockets have carried out a total of 4 experimental launch missions, namely the Long March 5 Yao 1, the Long March 5 Yao 2, the Long March 5 Yao 3, and the Long March 5 Yao 1. Long March 5B Yaoyi, both rockets have now entered the application launch stage.
Serving the manned spaceflight project and the Chang'e lunar exploration project are the original intentions of the development of the Long March 5 series of rockets. After entering the application stage, the Long March 5 Yao 4, Long March 5 Yao 5, and Long March 5B Yao 2 will respectively replace the Tianwen 1 Mars exploration The instrument, the Chang'e-5 lunar sample return probe, and the Tianhe-1 core module were successfully sent into the predetermined orbit, making great contributions to the journey of my country's aerospace industry from "big" to "strong".
The Long March 5B Yao-2 launches the Tianhe-1 core module and ejects the fairing.
Since the Long March 5 Yaosan mission, this series of rockets has achieved impressive results of "five battles and five victories" so far. All the spacecraft launched are "important weapons of the country", which can be said to be " fat five " Not only have they grown up, but they have become more "mature".
The greater the ability, the greater the responsibility.
The European Space Agency's Ariane-5 high-thrust launch vehicle, which is at the same capacity level as the Long March 5, has carried out 113 launch missions so far. my country's commercial aerospace industry has now entered the fast lane, and the demand for the Long March 5 is obviously also high. Not too small. In addition to the manned aerospace project and the Chang'e lunar exploration project, the rocket can also be used for the deployment of large-tonnage communication satellites, large-tonnage remote sensing satellite , large-scale constellation one-rocket multi-satellite network launches and other tasks.
Long March 5 Yaosan launch practice-20 satellite
For example, the Long March 5 Yaosan rocket launched the Practice-20 satellite developed based on the DFH-5 satellite platform. The maximum launch mass of this satellite platform can reach 9 tons, which is higher than the Shenzhou spacecraft. is even heavier. The energy system uses a twice-expanded large-area solar wing . The power of the whole star is more than 28kW. The platform can be equipped with more than 120 transponders and 14 antennas. The power system uses a combination of high-power ion electric propulsion and chemical propulsion. With dual-mode power, the satellite platform has a service life of more than 15 years, and many technical indicators are among the world's leading.
Shijian-20 satellite
At present, the Shijian-20 satellite has been operating stably in orbit for more than two years. Now it is time for the advanced satellite platform DFH-5 to branch out.
For another example, as early as three years ago, the Changchun Institute of Optics and Mechanics of the Chinese Academy of Sciences announced that the world's largest 4-meter-diameter silicon carbide reflector developed by the institute had successfully passed the acceptance test. This equipment can be used for ground-based large-aperture astronomy. Telescope can also be used for space-based large-tonnage remote sensing satellite .
4-meter diameter silicon carbide reflector
A large-tonnage remote sensing satellite equipped with a 4-meter silicon carbide reflector is deployed in a geosynchronous orbit 36,000 kilometers away and can dynamically monitor any point on one-third of the earth's surface, which is important for Finding large flat-panel ships on the vast ocean is a rare strategic weapon. The launch vehicle that can launch a spacecraft of this size and weight is the Long March 5.
The wonderful moment of the launch of the Long March 5 Yaosi rocket
In order to meet the needs of future satellite launches, the self-upgrading of the Long March 5 rocket has never stopped. The current fairing used by Long March 5 has a maximum diameter of 5.2 meters and a length of about 12 meters, which can meet the launch mission of single-star for large-tonnage satellites, but the efficiency is not outstanding.
Therefore, after demonstration, is currently developing a 19-meter-long extended fairing . After using this fairing, the Long March 5 can launch two DFH-4 satellites with one rocket and two satellites, or one DFH with one rocket and two satellites. -5 satellites + one DFH-3 satellite. As for other small and medium-sized satellites, they can be deployed in batches with multiple satellites.
The new fairing of the Long March 5 will be extended by another 7 meters
The space stage will be as big as the launch vehicle's capacity. This wise saying in the aerospace industry has been fully reflected in the Long March 5 launch vehicle. Compared with the Long March 5 rocket's capacity, Larger, more efficient heavy-duty vehicles are also on their way.
