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The National Interest on MSNThe X-13 Vertijet Proved That VTOL Aircraft Could Fly HighThe X-13 was developed in the 1950s, at a time when aerospace research was perhaps at its most fervent. The Ryan X-13 ...
And the aircraft has to be able to tilt its rotors or wings in mid-air while still managing to stay aloft. Even so, in the 1950s, engineers realized that it might actually be possible to build a ...
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