Photo by Wang Jiangbo

　　China News Agency, Beijing, November 29th (Ma Shuaisha and Dong Jiaying) On November 29th, the Long March 2F Yao15 launch vehicle (hereinafter referred to as the "Chang 2F rocket") took off at the Jiuquan Satellite Launch Center. The Shenzhou 15 manned spacecraft with three astronauts was accurately sent into the predetermined orbit.

This is the first time that the Chang-2F rocket has sent three astronauts into space since the "T" configuration of the Chinese space station was completed, starting the final battle of the construction phase of the Chinese space station.

　　This launch is the tenth time that the Chang-2F rocket has escorted astronauts into space, and it is also the first time to help astronauts carry out work handover in space.

Prior to this, the Chang-2F rocket has created many "firsts" of Chinese launch vehicles.

The first type of manned launch vehicle

　　The Chang-2 F rocket is China's first manned launch vehicle and is known as the "magic arrow".

In the past 30 years, the Chang-2F rocket has participated in every step of the "three-step" strategy of China's manned spaceflight project. Successfully launched 15 Shenzhou spacecraft and 2 space laboratories, including 10 manned launch missions, with a success rate of 100%.

The first rocket to live-stream with on-board images

　　The Chang-2 F rocket is the first rocket to try live broadcast of rocket-borne image and video in domestic space launches, and it turns the live broadcast of rocket launches into a "routine".

Nowadays, people can watch rocket launches in real time through TV and mobile phones, and feel the shocking moments of the "magic arrow" taking off again and again.

　　Since the launch of the Chang-2 F Yao-6 rocket in 2005, the Chang-2 F rocket has added a telemetry image measurement system. The two camera devices installed on the rocket can transmit and receive signals in real time, and intuitively observe booster separation and primary and secondary separation. , fairing separation, ship and arrow separation and other time-sequence rocket images.

The reliability and safety of active rockets come first

　　Due to the special mission of ensuring the safe entry of astronauts into space, high reliability, high safety, and high adaptability are the constant and top goals of the Chang-2F rocket.

The reliability requirements of the Chang-2F rocket have been far higher than international standards since the beginning of development. According to the design indicators, the reliability of the Chang-2F rocket has reached 0.97, and the safety has reached 0.997.

For this launch, the developers made improvements in reliability. At present, the reliability of the rocket has increased to 0.9895, and the safety has reached 0.99996.

　　In appearance, there is a pointed "hat" escape tower on the head of the Chang-2F rocket.

As a manned rocket, the Chang-2F rocket is the only rocket in active service in China that has a fault detection system and an escape system.

"Their main purpose is to detect rocket faults during the launch phase and the rocket's flight ascent phase. These two systems can take the astronauts out of the rocket's danger zone and ensure the safety of the astronauts." The second president of the China Aerospace Science and Technology Corporation Liu Feng, deputy chief designer of the F launch vehicle, said.

The first rocket to carry out emergency rescue missions

　　Since the implementation of the Shenzhou 12 mission, the Chang-2F rocket has adopted the launch mode of "one launch, one backup" and "rolling backup" to meet the needs of quickly launching a rescue spacecraft to pick up the astronauts, and to provide space for the astronauts. Life safety plus "double insurance".

Chen Muye, the general designer of the No. 1 and No. 2 F rockets, said: "'With two rockets on site at the same time in one mission, the emergency rescue rocket can be launched in 8.5 days at the fastest to perform the rescue mission."

　　In the first half of this year, as the emergency rescue rocket for the Shenzhou 14 manned launch mission, the Chang 2F Yao 15 rocket has been on emergency duty "on guard", witnessing the final assembly test, transfer and launch of the Chang 2 F Yao 14 rocket. process.

　　After the completion of the in-orbit construction, the Chinese space station will enter the application and development stage of more than 10 years. The initial plan is to launch 2 manned spacecraft and 2 cargo spacecraft every year.

The Chang-2F rocket will lift more astronauts into space and leave more Chinese figures in the vast universe.

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