Quote:
Originally Posted by Rockstar
The fastest plane in the world is the NASA X-43 @ Mach 9.6. The previous record of mach 6.7 was held by the North American X-15.
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That would depend on your definition of a "plane"
The Orbiter entered the atmosphere between Mach 10 and 20 depending on the mission. Personally, I would not consider the Orbiter to be an airplane, but others may disagree