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  2. Sound barrier - Wikipedia

    en.wikipedia.org/wiki/Sound_barrier

    The sound barrier or sonic barrier is the large increase in aerodynamic drag and other undesirable effects experienced by an aircraft or other object when it approaches the speed of sound. When aircraft first approached the speed of sound, these effects were seen as constituting a barrier, making faster speeds very difficult or impossible.

  3. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound is how fast vibrations travel. At 20 °C (68 °F), the speed of sound in air, is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or 1 km in 2.91 s or one mile in 4.69 s.

  4. Supersonic speed - Wikipedia

    en.wikipedia.org/wiki/Supersonic_speed

    Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level , this speed is approximately 343.2 m/s (1,126 ft/s; 768 mph; 667.1 kn; 1,236 km/h).

  5. 11 photos of America's fighter jets breaking the sound barrier

    www.aol.com/article/2016/03/07/11-photos-fighter...

    At a speed of about 767 miles per hour, depending on temperature and humidity, a moving object will break the sound barrier. It was not until World War II, when aircraft started to reach the ...

  6. Transonic - Wikipedia

    en.wikipedia.org/wiki/Transonic

    Transonic (or transsonic) flow is air flowing around an object at a speed that generates regions of both subsonic and supersonic airflow around that object. [1] The exact range of speeds depends on the object's critical Mach number, but transonic flow is seen at flight speeds close to the speed of sound (343 m/s at sea level), typically between Mach 0.8 and 1.2.

  7. Virgin Galactic Spaceship Breaks Sound Barrier - AOL

    www.aol.com/2013/04/30/virgin-galactic-spaceship...

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  8. ThrustSSC - Wikipedia

    en.wikipedia.org/wiki/ThrustSSC

    In 1983 Richard Noble had broken the world land speed record with his earlier car Thrust2, which reached a speed of 1,019 km/h (633 mph). The date of Andy Green's record came exactly a half century and one day after Chuck Yeager broke the sound barrier in Earth's atmosphere, with the Bell X-1 research rocket plane on 14 October 1947.

  9. Israeli warplanes break sound barrier over Beirut, Lebanese ...

    www.aol.com/news/israeli-warplanes-break-sound...

    Israeli warplanes broke the sound barrier over Beirut and other areas of Lebanon on Tuesday, Lebanese security sources and media reported, rattling nerves as the conflict between the Iran-backed ...