Key Points and Summary - The X-15 was a rocket-powered research aircraft that pushed human flight to the edge of space and deep into the hypersonic regime. -Air-launched from a B-52, three X-15s flew ...
An aircraft capable of hitting 4,520 mph (nearly seven times the speed of sound) is ludicrous to even think about, but the North American X-15 achieved this, defying comparison to any other aircraft ...
A. Scott Crossfield Papers, Accession number 2006-0041, National Air and Space Museum, Smithsonian Institution. A. Scott Crossfield Papers, Acc. 2006-0041, National ...
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