Boeing X-51
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The Air Force Research Laboratory's X-51 Scramjet-Waverider is being built by Pratt & Whitney and Boeing. This scramjet demonstrator is to fly by 2009 at target speeds close to Mach 7. Ground tests of the X-51A will begin late 2006. The X-51A is a descendant of earlier efforts including the Advanced Rapid Response Missile Demonstrator and the liquid hydrocarbon-fuelled scramjet engine developed under the USAF’s HyTech program.
During the flight demonstrations, a B-52 will carry the vehicle to an altitude of about 35,000 feet and then release it. Initially propelled by a U.S. Army tactical missile system solid rocket booster, the scramjet will take over at approximately Mach 4.5, and the vehicle will accelerate to a flight speed near Mach 7.
A preliminary version of the X-51, the "Ground Demonstrator Engine No. 2", completed wind tunnel tests at the Langley Research Center on July 27, 2006.
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Related development: Boeing X-43
Comparable aircraft:
X-1 • X-2 • X-3 • X-4 • X-5 • X-6 • X-7 • X-8 • X-9 • X-10 • X-11 • X-12 • X-13 • X-14 • X-15 • X-16 • X-17 • X-18 • X-19 • X-20 • X-21 • X-22 • X-23 • X-24 • X-25 • X-26 • X-27 • X-28 • X-29 • X-30 • X-31 • X-32 • X-33 • X-34 • X-35 • X-36 • X-37 • X-38 • X-39 • X-40 • X-41 • X-42 • X-43 • X-44 • X-45 • X-46 • X-47 • X-48 • X-49 • X-50 • X-51
See also List of experimental aircraft
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