The Tianzhou-2 cargo spaceship and the Long March 7 Yao-3 carrier rocket combination have been transferred to the launch area. The spaceship will deliver important materials and dock with the previously launched Tianhe Core Module. Chinese manned space officials released articles detailing the Tianzhou-2 cargo spaceship and the Long March 7 Yao-3 carrier rocket.
According to the mission plan, the Tianzhou-2 cargo spaceship will carry three astronauts' consumables for three months, two sets of extravehicular spacesuits, and platform materials for rendezvous and docking, propellant supplement, and combination flight with the previously launched Tianhe core module. The spaceship's sealed cabin carries about 4.69 tons of uplink cargo, 1.95 tons of propellant, and nearly 6.64 tons of total materials.
China's Long March 7 carrier rocket will undertake the launch mission. Officially, the Changqi rocket uses a new type of liquid oxygen kerosene engine and green, low-temperature and high-energy liquid oxygen kerosene fuel. During takeoff, six 120 ton high thrust engines provided more than 700 tons of thrust, and four liquid oxygen kerosene engines were used to relay the core II, which was enough to send the cargo carrying Tianzhou-2 into the orbit of rendezvous and docking with the core module.
The Changqi rocket has not only strong carrying capacity, but also high reliability. Its reliability design index is as high as 0.98, which is at the international leading level. To achieve this goal, designers have carried out reliability engineering development of models at the beginning of development. In addition, in all aspects of manufacturing, testing, transportation, launching, etc., the Long Seven Rocket has fully inherited the successful practices of previous models.
IT home learned that since the Changqi rocket uses a full cryogenic liquid oxygen kerosene power system, the pre launch process is more complex, requiring precise injection of ultra-low temperature fuel, and the launch window is very narrow. The official said that this launch mission for the first time used a new method of satellite navigation timing to independently correct the takeoff time, expanding the launch requirements of the manned space rendezvous and docking mission from "zero window" to "narrow window", ensuring the orbit entry accuracy with the target orbital plane, and improving the adaptability of the rocket launch mission in the space station project.
According to the mission plan, three cargo ships will be launched this year and next, all of which will be launched by the Long March 7 carrier rocket.
