On the week of 23rd December 2021, Wenchang Spacecraft launch Center –Hainan Province –China – People’s Republic of China.. CNSA – China National Space Administration– China successfully launched test twelve satellites 01 and 02 …… At 18:12 Hong Kong SAR Beijing time on December 23, 2021, Beijing time, China used the Chang Zheng Long March 7 Carrier Rocket at the Wenchang Spacecraft Launch Centre at the Hainan province Site and successfully tested the twelfth series satellite deploying the Satellites 01 and 02 were launched into space, the satellites entered the scheduled orbit smoothly, and the launch mission was a complete success. This mission is the 402th flight of the Long March series of carrier rockets….
The Chang Zheng Long March seven Carrier Rocket is the of China Academy of Launch Vehicle Technology (“Rocket Academy” for short) is a new generation of medium-sized high-orbit three-stage liquid bundled launch vehicle developed based on the Chang Zheng Long March seven.
The booster, first and second stage of the Chang Zheng Long March seven. Are used, but the third stage inherits the third sub-stage of the Long March ⅢA series rocket, so as to achieve 7 tons of geosynchronous transfer orbit carrying capacity, filling my country’s geosynchronous transfer orbit 5.5 The blank of carrying capacity between t～7t.
The total length of the rocket is 60.13 meters, the diameter of the first and second cores is 3.35 meters, the diameter of the third core is 3 meters, the diameter of a single booster is 2.25 meters, and the rocket take-off mass is about 573 tons. It is mainly used for geosynchronous satellite launch missions and geosynchronous transfers. The orbital carrying capacity is 7 tons, which fills the gap of the carrying capacity between 5.5t and 7t in my country’s geosynchronous transfer orbit.
The first, second and booster basically inherited the Long March 7 carrier rocket, using the 120-ton YF-100 engine and the 18-ton YF-115 engine.
The third sub-stage basically inherits the last stage of the liquid hydrogen and liquid oxygen of the Long March 3A series carrier rocket. It uses two 8-ton thrust YF-75 engines and has the ability to start twice.
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