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Additionally, the X-22 was to provide more insight into the tactical application of vertical takeoff troop transporters such as the preceding Hiller X-18 and the X-22's successor, the Bell XV-15. Another program requirement was a true airspeed in level flight of at least 525 km/h (326 mph; 283 knots).
[22] X-13 Vertijet: Ryan: USAF, USN 1955 Vertical takeoff and landing (VTOL) tailsitting VTOL flight. [23] X-14: Bell USAF, NASA 1957 VTOL Vectored thrust configuration for VTOL flight. [24] X-15: North American USAF, NASA 1959 Hypersonic, high-altitude flight First crewed hypersonic aircraft; capable of suborbital spaceflight. [25] X-15A-2 ...
The Vertical Take-Off and Landing Experimental Aircraft (VTOL X-Plane) program was an American research project sponsored by the Defense Advanced Research Projects Agency (DARPA). The goal of the program was to demonstrate a VTOL aircraft design that can take off vertically and efficiently hover, while flying faster than conventional rotorcraft ...
Bell X-14 (vectored thrust) Bell X-22 ; Bell XV-3 (first tiltrotor) Bell XV-15 (tiltrotor) Bensen B-10 (ducted fan) Boeing/McDonnell Douglas AV-8 Harrier (vectored thrust) Boeing-Vertol VZ-2 ; Boeing X-32B (vectored thrust) Boeing X-50 (stoppable-rotor gyrodyne UAV - failed to achieve forward flight) Boulton Paul P.137 VTOL research aircraft
An USAF CV-22 in flight The Bell X-22 with four tilting ducted fans. The powered rotors of a tiltrotor (sometimes called proprotor) are mounted on rotating shafts or nacelles at the end of a fixed wing, and used for both lift and propulsion. For vertical flight, the rotors are angled to provide thrust upwards, lifting the way a helicopter rotor ...
Both experimental programs proceeded to flight status and completed test flights 1954–1955, when the contracts were cancelled. [10] Similarly, the Ryan X-13 Vertijet flew a series of test flights between 1955 and 1957, but also suffered the same fate. [11] The use of vertical fans driven by engines was investigated in the 1950s.
The propellers face upward during vertical take-off or landing but can also tilt forward to better enable horizontal flight, like a fixed-wing aircraft, which means more versatility and efficiency ...
An X-35B vertical landing (video) Elements of the X-35 design were pioneered by the F-22 Raptor, and portions of the VTOL exhaust duct design were previously used by the Convair Model 200, a 1972 supersonic VTOL fighter requirement for the Sea Control Ship; in particular, the three-bearing swivel nozzle used in the X-35B was pioneered by the ...