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The NASA X-43A is the fastest unmanned rocket/scramjet plane. It cannot initiate flight on it's own. It is launched from under the wing of another aircraft.
The X-15 is the fastest manned rocket plane. It also was launched from under the wing of another aircraft. It's top speed was Mach 6.7
The SR-71 is the fastest jet engine, manned plane. It was capable of sustained Mach 3+ flight and set several official speed records that still stand today.
According to the NASA web site:
"Guinness World Records recognized NASA's X-43A scramjet with a new world speed record for a jet-powered aircraft - Mach 9.6, or nearly 7,000 mph. The X-43A set the new mark and broke its own world record on its third and final flight on Nov. 16, 2004. "
"In March 2004, the X-43A set the previous record of Mach 6.8 (nearly 5,000 mph). The fastest air-breathing, manned vehicle, the U.S. Air Force SR-71, achieved slightly more than Mach 3.2."
While there are other aircraft that claim to be faster than the SR-71, none can sustain Mach 3+. The Russian MIG-25 can only hit a peak of around 3.2 before having to decelerate to prevent severe damage to it's engines.
Links are not permitted here, but you can visit the Guinnesworldrecords dot com web site.
the fastest plane is black bird.
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