sound barrier

     

In aeroynamics, the sound barrier usually refers to the point at which an aircraft moves from transonic to supersonic speed. The term came into use during World War II when a number of aircraft started to encounter the effects of compressibility, a grab-bag of unrelated aerodynamic effects. The term fell out of use in the 1950s when aircraft started to routinely "break" the sound barrier. Refer to the speed of sound for the science behind the velocity referred to as the sound barrier, and to sonic boom for information on the sound associated with supersonic flight.

Trivia about sound barrier

  • On May 18, 1953 pilot Jacqueline Cochran became the first woman to break this barrier
  • In 1935 Robert Goddard was the first to have a liquid fuel rocket break this "barrier"
  • In 70-degree air, a plane traveling at about 1,130 feet per second breaks it
  • On Oct. 1, 1969 the Concorde broke this barrier for the first time
  • The cloud seen here was formed after this was broken

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