In its first flight attempt, the Boeing X-51A WaveRider unmanned aerial vehicle (UAV) successfully flew at a top speed of Mach 5 for three and a half minutes - a mission that its creators described as the longest supersonic combustion ramjet (scramjet)-powered flight in history.
As its designation indicates, the WaveRider is designed to ride on its own shockwave as it flies at high-supersonic and hypersonic speeds.
The X-51A was carried aloft under the left wing of an US Air Force (USAF) Flight Test Center B-52H Stratofortress that took off from Edwards Air Force Base, California.
An attempt to conduct the trial on the previous day had to be abandoned before the B-52 had taken off. A US Navy P-3 Orion aircraft supporting the test had discovered a ship steaming in international waters underneath a block of restricted airspace located in the vicinity of the UAV's potential splashdown zone.
The X-51A was released at around 1000 h local time while the aircraft was flying at approximately 50,000 ft over the Point Mugu Naval Air Warfare Center Sea Range.
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