The X-13 was developed in the 1950s, at a time when aerospace research was perhaps at its most fervent. The Ryan X-13 ...

Dual Propellors For Convair's VTOL XFY-1 Pogo Militaries worldwide were studying the concept long before the legendary AV-8B Harrier II ever lifted off, and Convair's XFY Pogo is proof of that.

Originally flown in the late 1960s, the Harrier has undergone a series of improvements that have increased safety, range and lethality. The AV-8B is a key component of the Marine Corps’ “all ...

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 ...