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Email Autor Correction ID #1432251 / 45 Views
3-June-2016
56-6670 First X-15 on display at the National Air and Space Museum. Just three of these aircraft were built, and only 12 pilots flew them including Neil Armstrong for a total of 199 flights from 1959-68. The B-52 air-launched X-15 set the world's unofficial speed of Mach 6.70 with Flight No. 2-53-97 and an altitude record of 354,200 ft. with Flight No. 3-22-36. The third X-15 was lost in a fatal accident on Nov. 15, 1967. (more of 56-6670)