The North American X-15 was built to flirt with the edge of space, not to cross it by accident. Yet on a research mission labeled Flight 90, a routine test profile slipped just far enough out of ...
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Flight 90 and the X-15, how a small test deviation turned a research plane into America’s first civilian spaceflight
In 1963, a routine X-15 test flight climbed just a little higher than planned, carrying pilot Joseph Walker beyond the Kármán Line and into space. This is the precise chain of decisions, physics, and ...
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