Boeing Aircraft Sets Hypersonic Flight Record
An experimental unmanned aircraft flies for three-and-a-half minutes at five times the speed of sound.
In this Wednesday, May 1, 2013 photo released by the U.S. Air Force, the
X-51A Waverider, carried under the wing of a B-52H Stratofortress
bomber, prepares to launch for its fourth and final flight over the
Pacific Ocean. The X-51A, an experimental, unmanned aircraft developed
for the U.S. Air Force, went hypersonic during a test off the Southern
California coast, traveling at more than 3,000 mph, the Air Force said
Friday. The Air Force has spent $300 million studying scramjet
technology that it hopes can be used to deliver strikes around the globe
within minutes. (AP Photo/U.S. Air Force, Bobbi Zapka)
