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        Oct. 14:
1947 Chuck Yeager breaks sound barrier
     10月14日:1947年チャック・イーガーが初めて超音速飛行

Wikipedia:"1947 – Chuck Yeager becomes the first person to exceed the speed of sound."
                 "1947 October 14 Yeager breaks sound barrier-HISTORY"
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Chuck Yeager-Wikipedia"       "Bell X-1-Wikipedia"
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1947 October 14 Yeager breaks sound barrier-Images"
       
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              "1947 October 14 Yeager breaks sound barrier-HISTORY"
U.S. Air Force Captain Chuck Yeager becomes the first person to fly faster than the speed of sound.

Yeager, born in Myra, West Virginia, in 1923, was a combat fighter during World War II and flew 64 missions over Europe. He shot down 13 German planes and was himself shot down over France, but he escaped capture with the assistance of the French Underground. After the war, he was among several volunteers chosen to test-fly the experimental X-1 rocket plane, built by the Bell Aircraft For years, many aviators believed that man was not meant to fly faster than the speed of sound, theorizing that transonic drag rise would tear any aircraft apart. All that changed on October 14, 1947, when Yeager flew the X-1 over Rogers Dry Lake in Southern California. The X-1 was lifted to an altitude of 25,000 feet by a B-29 aircraft and then released through the bomb bay, rocketing to 40,000 feet and exceeding 662 miles per hour (the sound barrier at that altitude). The rocket plane, nicknamed “Glamorous Glennis,” was designed with thin, unswept wings and a streamlined fuselage modeled after a .50-caliber bullet.Company to explore the possibility of supersonic flight.

Because of the secrecy of the project, Bell and Yeager’s achievement was not announced until June 1948. Yeager continued to serve as a test pilot, and in 1953 he flew 1,650 miles per hour in an X-1A rocket plane. He retired from the U.S. Air Force in 1975 with the rank of brigadier general.

October 14 

 

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