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      able to reach speeds equal to or more than five times the speed of sound


NASA's X-43A scramjet set a new world speed record in 2004 when it flew at hypersonic speeds.

The X-43A reached a speed of nearly 7,000 miles per hour, which means it reached a hypersonic speed.


More Information:
How Do Airplanes Fly?
What Is Aerodynamics?

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The X-43A launches from a modified Pegasus booster rocket
A modified Pegasus booster rocket fires to send the X-43A on its record-setting flight on Nov. 16, 2004.
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Page Last Updated: October 9th, 2014
Page Editor: Sandra May