October 4, 1947 (New August 20), the first human to break the speed of sound.



Yeager and "charm Glenn Nice" together
, in 1947, Chuck - Yeager became the first to do supersonic flight.
former U.S. fighter pilot boarded the Bell X-1 type jet. Takeoff from a secret army base in California. A few minutes later, his speed reached 960 km, breaking the sound barrier. Driving Yeager's aircraft named the "charm Glenn Nice, a new rocket-powered body streamlined to reduce the acceleration bumps. Other countries are also to improve the speed of the aircraft so that it exceeds the speed of sound - Mach -1. (L $ dj��.����T)