In middle school, Qian Xuesen was worried about the corruption and backwardness of old China. 1948, when the liberation of the motherland is expected, he is ready to return to China. At that time, the United States did everything possible to prevent Qian Xuesen from returning to China. Its real purpose is to attach importance to his knowledge and try to force him to change his mind and stay in America. Even if you fail, you should make your high-tech knowledge obsolete.
Indeed, after completing four doctoral theses, such as "Research on High-speed Aerodynamics" from June 65438 to June 0939, Qian Xuesen engaged in independent research on the stability of thin shells in the rocket technology research group led by von Carmen. Later, he became von Carmen's assistant and one of the first six members of Guggenheim Laboratory, the cradle of American rocket technology, and calculated and studied the influence of nozzle diffusion angle of rocket engine on thrust, thermodynamic characteristics of rocket engine and performance of sounding rocket.
1942, Qian Xuesen, who made outstanding achievements in research, was hired as a teacher in the jet technology training class of California Institute of Technology, and trained a number of rocket and missile officers for the US military in this position. From 65438 to 0943, he cooperated with rocket expert Marina to complete the research report "Review and Preliminary Analysis of Long-range Rockets", which laid a theoretical foundation for the research of missiles and sounding rockets in the United States in the 1940s. 1944, the us army got the information that Germany was developing V-2, so it appointed von Carmen and marina to study long-range rockets vigorously, and Qian Xuesen was assigned to be in charge of the theoretical group. At this time, Qian Xuesen's rocket technology research group has been reorganized into a jet propulsion laboratory. They developed sounding rockets for female soldiers and missiles for private A and sergeant, which laid the foundation for the development of advanced strategic missiles such as Polaris, militia and Poseidon.
At that time, aviation technology was troubled by "sound barrier" and "thermal barrier". Qian Xuesen and von Carmen successfully solved the problems of "sound barrier" and "thermal barrier" through theoretical research and rocket plane test. The famous "Carmen-Qian Xuesen formula" has become the authoritative formula for aerodynamic calculation. Qian Xuesen's many pioneering contributions made him the head of the Jet Propulsion Laboratory, and he was recognized as an authoritative scholar in the fields of mechanics, applied mathematics and rocket technology.
At the beginning of 1945, Qian Xuesen became a member of the air force scientific advisory group headed by von Carmen. After Germany surrendered, he went to Europe with the investigation team of the regiment to inspect aviation and rocket technology. 1947 At the beginning of this year, 36-year-old Qian Xuesen became a full professor at MIT. During the monitoring period, apart from teaching, he still did not give up academic research. 1953 published "Take-off from Earth Satellite Orbit", which laid the foundation of small thrust flight mechanics. 1954 published "Engineering Cybernetics". 1955 when saying goodbye to von Carmen before returning to China, von Carmen said excitedly, "You have surpassed me academically now!"
After returning to China, with the support of the Party and state leaders, Qian Xuesen actively participated in the planning and establishment of China's rocket and space industry. With his profound knowledge in aerodynamics, rocket engine, guidance and control, overall structure, material technology, computer, quality control and system engineering, he trained a large number of rocket and space technicians for China and played a great role in leading the development of missiles, launch vehicles and spacecraft in China. With his participation and organization, China successfully launched its first imitation missile on June 5,1960+065438; On June 29th, 1964, the first self-designed missile successfully made its first flight; 1970 On April 24th, China's first artificial earth satellite was successfully launched.
1979, Qian Xuesen won the "Outstanding Alumni Award" of California Institute of Technology. 1985 became the first special prize winner of scientific and technological progress in China; 1in June, 989, the International Institute of Technology awarded him the highest award-"the Little Rockwell Medal"; 199 1 In June, the state awarded him the honorary title of "National Outstanding Contribution Scientist".