Yet another in a long line of bizarre Vertical Take-Off & Landing (VTOL) concepts was this plan for turning an F-104 Starfighter into a supersonic helicopter. Proposed by Ryan Aeronautical engineer Peter Girard (who had flown the actual Ryan X-13 Vertijet), the plan called for replacing the Starfighter's stubby wings with a triangular dorsal-mounted airfoil. The airfoil was to spin like a helicopter blade, the tips of the triangle tilting to provide the necessary lift. Once the craft was airborne, the triangle would lock into a straight horizontal position and serve as a traditional "wing" for conventional flight.
Fortunately, the development of the vertical take-off Hawker Harrier later in the decade precluded this seemingly suicidal concept from actually being pursued.
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