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Air Commandos with the 801st Special Operations Aircraft
USS Chancellorsville sailor conducts rotor head check
Captain Andrew "Dojo" Olsen, an F-35 Demonstration
Military members participating in U.S. Pacific Command
U.S. Navy Aviation Machinist's Mate 2nd Class Megan
An E-2C Hawkeye assigned to Carrier Airborne Early Warning Squadron One Two Five (VAW-125) makes an arrested landing aboard the aircraft carrier USS John F. Kennedy (CV 67).
Grumman S-2E, 149261, VS-38, Space and Aviation museum SDASM
A U.S. Air Force F-15E Strike Eagle assigned to the
A ground crewman positions a TA-75 tow tractor in front of an Airborne Early Warning Squadron 78 (VAW-78) E-2C Hawkeye aircraft parked on the flight line at Naval Air Station, Norfolk
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Airacuda Bell XFM-1rear view, Space and Aviation museum SDASM
Vista da Praça XV - Glass negative photogrpah. Public domain.
Bell X-14A VTOL Demonstration. Experimental NASA aircraft photograph.
Bell XFM-1 Airacuda side view, 1940
Belvedere Trianon 15 - A black and white photo of a patio with tables and chairs
Bell X-14A VTOL. Experimental NASA aircraft photograph.
X-15 cockpit, NASA history collection
Belvedere Trianon 14
X-15 Mated to B-52 Captive Flight
Overhead view of Bell XV-3 Convertiplane
Summary
Overhead view of Bell XV-3 Convertiplane. First tilt rotor tested in the 40 x 80 wind tunnel. Transition aerodynamics studied; shown in hover mode.
Don Richey
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.