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Related
X-14A NASA 234 hovering over ramp at the NASA Ames Research Center, Moffett Field, CA ARC-1962-A-29976
XV-15 Tilt Rotor (NASA-703) hovers at Ames Research Center, helicopter mode ARC-1985-AC85-0186-35
XV-15 Tilt Rotor (NASA-703) hovers at Ames Research Center ARC-1985-AC85-0186-34
XV-15 Tilt Rotor (NASA-703) hovers at Ames Research Center ARC-1985-AC85-0186-37
XV-15 Tilt Rotor (NASA-703) hovers at Ames Research Center ARC-1985-AC85-0186-33
XV-15 Tilt Rotor (NASA-703) in flight at Ames Research Center ARC-1985-AC85-0186-41
XV-5B (NASA-705) on Flight Line at Ames Research Center with hangar in the background. ARC-1969-AC-41358
XV-15 Tilt Rotor (NASA-703) in flight at Ames Research Center ARC-1985-AC85-0186-40
XV-15 Tilt Rotor (NASA-703) hovers at Ames Research Center ARC-1985-AC85-0186-36
X-14A over ramp at Ames Research Center ARC-1962-A-29966
Summary
X-14A over ramp at Ames Research Center
Public domain photograph of NASA experimental aircraft, free to use, no copyright restrictions image - Picryl description
The X-planes are a series of experimental United States aircraft and rockets, used to test and evaluate new technologies and aerodynamic concepts. They have an X designator, which indicates the research mission within the US system of aircraft designations. The first, the Bell X-1, became well known in 1947 after it became the first aircraft to break the sound barrier in level flight. Most of the X-planes have been operated by the National Advisory Committee for Aeronautics (NACA) or, later, the National Aeronautics and Space Administration (NASA), often in conjunction with the United States Air Force. The majority of X-plane testing has occurred at Edwards Air Force Base. Some of the X-planes have been well publicized, while others have been developed in secrecy. Most X-planes are not expected to go into full-scale production.