Search results
Results from the WOW.Com Content Network
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.
Boom’s inaugural XB-1 supersonic test flight reached speeds of more than 850 miles per hour. ... accelerating to Mach 1.1 speed and then breaking the sound barrier in three high-speed runs ...
The sound source has now broken through the sound speed barrier, and is traveling at 1.4 times the speed of sound, c (Mach 1.4). Because the source is moving faster than the sound waves it creates, it actually leads the advancing wavefront. The sound source will pass by a stationary observer before the observer actually hears the sound it creates.
The sound barrier was first broken on Oct. 14, 1947, according to the U.S. Air Force. That's when Capt. Chuck Yeager and the Bell X-1 rocket-propelled aircraft broke the sound barrier.
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 ...
This is the first time in history that a land vehicle has exceeded the speed of sound. The new records are as follows: Flying mile 1,227.985 km/h (763.035 mph) Flying kilometre 1,223.657 km/h (760.345 mph) In setting the record, the sound barrier was broken in both the north and south runs. Paris, 11 November 1997.
The single-seat jet, a 201-foot-long test model by Boom Supersonic, hit 844 mph just 12 minutes into its latest test flight out of California's Mojave Air and Space Port.
Therefore, for a boom to reach the ground, the aircraft's speed relative to the ground must be greater than the speed of sound at the ground. For example, the speed of sound at 30,000 feet (9,100 m) is about 670 miles per hour (1,080 km/h), but an aircraft must travel at least 750 miles per hour (1,210 km/h) (Mach 1.12) for a boom to be heard ...