Thread: You Can't Make This Stuff Up!
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Old 07-10-2023, 01:10 PM
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Lee Stewart Lee Stewart is offline
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Meet the X-15: It Flew At 4,250 Miles Per Hour

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The aircraft reached speeds of Mach 6 and reached altitudes of 250,000 feet along the “edge of outer space,”as described by aerospaceweb.org

The aerospaceweb.org article says that in 1967, the X-15 reached what was at the time a world record speed of 4,520 miles per hour, making it the highest speed ever recorded by a crewed, powered aircraft.
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