| 词条 | Sikorsky XV-2 | ||||||||||||||||||
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The Sikorsky XV-2, also known by the Sikorsky Aircraft model number S-57, was a planned experimental stoppable rotor aircraft, designated as a convertiplane, developed for a joint research program between the United States Air Force and the United States Army. The program was cancelled before construction of the prototype began. Design and developmentThe XV-2 was developed as part of a joint U.S. Air Force and U.S. Army program intended to explore technologies to develop an aircraft that could take off and land like a helicopter but fly at faster airspeeds, similar to a conventional airplane. The XV-2's stoppable-rotor design was intended to allow it to hover and fly at low speed like a conventional helicopter. It utilized a single-rotor design; a counterweight provided stability to the rotor system,[1] while a tip-jet arrangement powered the rotor, which retracted into the upper fuselage when stopped, the XV-2 then flying like a conventional aircraft on delta wings.[2] A single jet engine was provided for forward flight.[3] The XV-2 prototype was assigned the serial number 54-4403, but the project was cancelled before construction could begin.[4] See also{{aircontent|related= |similar aircraft=
|lists= }} References
1. ^Boyne 1984, p.178. 2. ^Sikorsky 2007, p.84. 3. ^Allen 1993, p.4-5. 4. ^Pearcy 1993, p.103.
External links{{commons category|Sikorsky aircraft}}
7 : Cancelled military aircraft projects of the United States|Gyrodynes|Sikorsky aircraft|Stoppable rotor helicopters|Single-engined jet aircraft|Tipjet-powered helicopters|High-wing aircraft |
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