On the 14th, the Soyuz ms-17 spacecraft carrying two Russian astronauts and one American astronaut achieved docking with the international space station three hours and three minutes after takeoff, setting a new record for rapid rendezvous and docking. Russia’s TASS 14 Daily reported that at 8:45 Moscow time, the soyuz-2.1a carrier rocket carrying the Soyuz ms-17 spacecraft ignited and lifted off from the Baikonur space launch site. < p > < p > the manned spacecraft successfully docked with the international space station at 11:48 Moscow time, and then the astronauts entered the space station. This time, the Soyuz ms-17 manned spacecraft only made two circles around the earth. Previously, several “progress MS” cargo spaceships had carried out this “fast flight” scheme, and the shortest time record for rapid rendezvous and docking set in 2017 was 3 hours and 18 minutes. < / P > < p > according to the report, the spaceship to the International Space Station usually needs to circle the earth 34 times and fly for two days. Another option is to circle the ground four times and fly for about six hours. < p > < p > Russo news agency 14 reported that Rafael murdazin, head of the ballistic Department of Russia’s “energy” space rocket company, said that the rapid flight mode of the “Soyuz” spacecraft could save fuel for Russia’s new space flight in the future and prepare for the moon landing. “According to our estimation, the ultra short two lap scheme will save about 30-35 kg of fuel compared with the two-day scheme.” It is understood that the implementation of rapid rendezvous and docking has many aspects of significance. For astronauts, it can shorten their stay time in the narrow space of the spacecraft and reduce unnecessary physical and energy efforts; from the mission point of view, rapid rendezvous and docking can make biological agents and other goods that cannot be transported for a long time arrive at the space station as soon as possible, which is very important for some experiments; from the safety point of view, if the space station and other spacecraft encounter an emergency The rapid rendezvous and docking is helpful for the rapid implementation of fault repair and emergency rescue. < / P > < p > why was the fast docking mode not used for manned missions before? An aerospace expert told the global times that the main problem is that the technology is difficult. Accurate calculation and programming are needed in advance to enable the spacecraft to have high autonomous guidance capability and go straight to the space station. At the same time, from the perspective of security, we will also adopt the mode of no one before someone. (Liu Yupeng) < A= https://ibmwl.com/category/global-tech/ target=_ blank>Global Tech