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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 ...
The AV-8B Harrier, for example ... But the Air Force, without an operational need for a VTOL aircraft, chose not to pursue further development of the X-13. The two prototypes are still on display ...
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