Vertical Takeoff Plane Demonstrated -- Convair test pilot J.F. Coleman stands on ladder ready to take over controls of the Navy's flying0 "Pogo Stick", Convair-built delta wing job inside the Navy's huge hangar for the first public demonstration of the vertical rising fighter plane. In center, the turbo prop plane, its two counter rotating propellers churning the air, rises slowly in tethered flight. At right the plane, still tethered, moves up to about 85 feet. June 2, 1954. (Photo by AP Wirephoto).