Shenzhou 12 astronauts successfully left the cabin.

Shenzhou 12 astronauts successfully left the cabin.

Shenzhou 12 astronauts successfully left the cabin. At 9: 22 on June 17, Beijing time, the improved Long March II F/G rocket, known as the "China Arrow", was launched on time. 12 seconds later, it turned by gravity and the arrow began to fly southeast. Two minutes after liftoff, the 8.35-meter escape tower at the top of the rocket was separated and abandoned.

Shenzhou XII astronauts successfully went to1June 17, and the Long March II F- 12 carrier rocket broke through the sky, sending the Shenzhou XII spacecraft with three astronauts into space. The first manned launch of China's manned space station in the on-orbit construction stage was a complete success, which laid a solid foundation for the smooth implementation of the follow-up mission. In the vast space, three Chinese astronauts will be stationed in China's own space station.

"God Arrow" and "Shenzhou" hold hands again.

The Long March II F carrier rocket (hereinafter referred to as the Chang II F rocket) is a secondary carrier rocket specially developed for manned space flight by the First Institute of China Aerospace Science and Technology Corporation. It is also the most complicated rocket among all the launch vehicles in China at present, and is known as the "God Arrow".

Since the successful launch of the 20 16 Shenzhou XI manned spacecraft, this mission is the second manned space mission of the Chang 'e VI rocket after a lapse of five years. Although the launch success rate of Chang 'e-6 F rocket reached 1.000% before, in order to successfully complete the high-density launch mission in the on-orbit construction stage of the space station, the developers made a number of technical improvements to this type of astronaut "special train", and its reliability and safety reached a new level.

Jing Muchun, the first president of China Aerospace Science and Technology Corporation and the commander-in-chief of the second F rocket, introduced that the Chang 'e-6 remote 12 rocket made 109 technical state changes, of which more than 70 were related to reliability improvement. These improvements do not involve major technical changes, but mainly eliminate weak links. Through hard work, researchers have improved the reliability of Chang-2 F rocket from 0.97 to 0.9894, once again setting their own record, which is in the forefront of the world.

Emergency rescue can be started within 10 days at the earliest.

During the on-orbit construction and operation of the space station, if there is serious danger or failure of the space station or spacecraft, the ground must quickly launch a rescue spacecraft to take the astronauts back. Therefore, Chang-2 F rocket has been on duty for emergency rescue since Yao-13 rocket, and can be launched within 10 days at the earliest.

According to the space station plan, China will complete the on-orbit construction of the space station through 1 1 missions this year and next, including four shenzhou spaceship missions. It concerns the life safety of astronauts, and Chang 'e II F rocket is "a big burden". Starting from the Yao-12 and Yao-13 rockets, the Chang-2 F rocket adopted the "rolling backup" launch mode of "launch 1 launch, backup 1 launch".

Take Chang Er F Yao 12 and Yao 13 rockets as examples. Two rockets entered the scene at the same time. First, the final assembly test of the remote 13 rocket is carried out, and then the final assembly test and launch of the remote 12 rocket are carried out. The processes of the two rockets intersect, and the model team works in parallel.

If the accident really comes, after receiving the emergency rescue order, the basic stage, fairing (semi-hood) and escape tower of Chang 'e-6 rocket can work synchronously and efficiently immediately. Chang Wuquan, the first president of China Aerospace Science and Technology Corporation and the chief designer of Yaoer F rocket, said that according to the specific needs of the emergency rescue mission of the space station, Yaoer F rocket has the' emergency launch capability' of 10 and 20 days, which can quickly launch the spacecraft and safely take the astronauts back.

Astronaut "special train" 100% success rate

Although "Shen Jian" and its good brother "Shenzhou" have not cooperated for five years, they still have a tacit understanding when they return to the familiar launch site. This time, the Chang 'e-6 rocket successfully completed the first manned launch mission during the on-orbit construction of the space station, escorted three astronauts to space safely, and created another miracle on the vast Gobi Desert. Next, the astronauts will stay in orbit for 3 months to carry out a series of operations such as extravehicular maintenance, equipment replacement and scientific application of load.

The project was established in 1992 and made its first flight in 1999. In the past 30 years, the Chang 'e VI rocket has participated in every step of the "three-step" strategy of China's manned spaceflight project, and * * * has carried out more than ten missions. Up to now, the Chang 'e-6 F rocket * * * has launched five unmanned spacecraft, 1 target aircraft, 1 space laboratory and seven manned spacecraft, all of which have been a complete success, sending 12 astronauts and 17 astronauts into space successively, leaving an indelible mark on the history of China's manned spaceflight project.

202 1 is the first year of on-orbit construction of China's manned space station, and the Chang-2 F rocket also ushered in a high-density launch year. Four launch missions are planned this year and next, and the launch density is unprecedented. In the next few years, Chang-2 F rocket will continue to be launched at a high frequency of two rounds per year, and will play an important role in the on-orbit construction and operation of China Space Station.

Shenzhou 12 astronauts successfully left the cabin 2. At 9: 22 this morning, China's earliest space launch site and the only manned space launch site-Jiuquan Satellite Launch Site in Inner Mongolia, SLS- 1 (also known as 92 1 station), 15 "Shen Jian" Long March II, with serial number 12.

The launch was officially broadcast live in accordance with international practice, and the information was disclosed in a timely manner. From the press conference held the day before the launch to the live broadcast of the whole network during the launch, the sense of rhythm is full of the confidence and calmness of astronauts.

At 9: 22 on June 17, Beijing time, the improved Long March II F/G rocket, known as the "Arrow of China", was launched on time. 12 seconds later, it turned due to gravity, and the arrow began to fly to the southeast. Two minutes after liftoff, the 8.35-meter escape tower at the top of the rocket was separated and abandoned. The task of the escape tower, which looks like a rocket lightning rod, is to quickly separate the rocket from the spacecraft and drag the orbital module and the return module to a safe place within 900 seconds before the rocket takes off and 160 seconds after the rocket takes off. Of course, the best state is not to use the escape tower, separate it and discard it.

T+2:3 1, four boosters with a diameter of 2.25m completed the task, separated from the primary rocket, and then the secondary engine started to ignite. The auxiliary machine consists of the main machine DaFY2 1-2 and the walking machine DaFY22- 1. DaFY2 1-2 belongs to high altitude large nozzle engine, and its vacuum thrust is about 746.97 kN. DaFY22- 1 The traveling engine belongs to the short nozzle engine with small thrust and high altitude, and it continued to work after the main engine was turned off 100 seconds, which escorted shenzhou spaceship into the scheduled orbit.

Nearly three and a half minutes after launch, the fairing was separated and abandoned; At T+7:33, the second main engine DaFY2 1-2 is turned off, and at T+9:32, the running engine DaFY22- 1 is turned off. After the scheduled deployment orbit was close to 200 kilometers, the Shenzhou-12 spacecraft was released immediately. Soon after, the spacecraft successfully deployed the solar wing, which meant that the launch link was completed.

It is estimated that about 6 hours after the launch, Shenzhou 12 will adopt the fast docking mode, and the target will dock with the forward port of the core module of Tianhe. By then, Shenzhou-12 spacecraft, Tianhe-1 core module and Tianzhou-2 cargo spacecraft will form an assembly. Nie Haisheng, Liu Boming and Tang Hongbo entered Tianhe and officially became the first astronauts stationed in China Space Station, starting a three-month space life. This will be China's longest manned space mission to date. At the same time, it also means opening the era of dual manned space flight with China Space Station and International Space Station in parallel.