The successful launch of the DF31AG by the Rocket Force into the South Pacific reminds us of the hard work and selfless dedication of Qian Xuesen, the backbone of the Chinese nation, and a large number of scientific and technological experts!
The DF31AG nuclear missile, carrying 10 simulated (nuclear) warheads, flew 12,500 kilometers and accurately hit the intended target with an error of 100 meters. For example, the accuracy of the DF31AG is equivalent to hitting a mosquito 100 meters away with a rifle. If the DF31AG is launched from the northeast, it can cover the entire continental United States across the Arctic. Of course, the more powerful strategic nuclear missiles of the mainland Rocket Force are the DF41 and DF51, the submarine-launched JL3, and the space-launched XHB (? Model to be confirmed).
At that time (late 1955 or early 1956), General Chen Geng, the president of Harbin Institute of Technology (today's Harbin Institute of Technology), asked Mr. Qian Xuesen if the Chinese could make their own missiles. Qian Xuesen asked humorously in his Zhejiang accent, Americans can do it, but Chinese can't? ! Are we Chinese not as good as Americans? ! Qian Xuesen paused and said firmly, of course we Chinese can make better missiles! General Chen Geng said, OK, let's go drink!
Before returning to China, Mr. Qian Xuesen was a professor of aerodynamics at CALTEC and served as the director of the Jet Aerodynamics Laboratory. He participated in the development of the newly started American domestic rocket (missile). The Qian-von Karman formula he published in collaboration with his mentor Professor von Karman is the basic formula of the discipline and the basis for the design of aviation vehicles.
After returning to China, Professor Qian Xuesen presided over the development of missiles in mainland China and developed the Dongfeng series of short-range, medium-range, long-range and intercontinental ballistic missiles with world-leading performance. Mr. Qian Xuesen had long foreseen the problem that ballistic missiles might be intercepted, and proposed the theory of variable trajectory of missile flight, the so-called Qian Xuesen trajectory. At the same time, as early as the late 1960s, Professor Qian Xuesen proposed that a complete missile defense system must be established. Mr. Qian Xuesen made great contributions to China's national defense science and technology, and was awarded China's highest honor-the "National Medal of Merit" in the 1990s. At that time, President Jiang Zemin personally presented the medal to Qian Xuesen. It is precisely because of the long-term hard work and selfless dedication of a large number of unknown scientific and technological experts represented by Mr. Qian Xuesen that a solid modern national defense science and technology Great Wall has been built for China.
