File:X-2 in flight.jpg

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描述 X-2 in flight.jpg	English: This inflight photograph of the X-2 (46-674) shows the twin set of shock-diamonds, characteristic of supersonic conditions in the exhaust plume from the two-chamber rocket engine. The Curtiss-Wright XLR-25 rocket engine caused one of several problems that delayed flight of the X-2. At one point, people in the project suggested its replacement. It was the first "man-rated" (in the terminology of the day) rocket engine that was throttleable, and the technology was not yet mature. Other problems included the X-2's landing gear and the replacement of the planned electronic flight controls with a conventional hydromechanical system like that used in the F-86.
日期	1955年 - 1956年 date QS:P,+1955-00-00T00:00:00Z/8,P1319,+1955-00-00T00:00:00Z/9,P1326,+1956-00-00T00:00:00Z/9
來源	https://www.dfrc.nasa.gov/Gallery/Photo/X-2/HTML/E-2822.html ( image link ); cropped from source.
作者	NASA

This image or video was catalogued by Armstrong Flight Research Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: E-2822 and Alternate ID: NIX-E-2822 .

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	This file is in the public domain in the United States because it was solely created by NASA . NASA copyright policy states that "NASA material is not protected by copyright unless noted ". (See Template:PD-USGov , NASA copyright policy page or JPL Image Use Policy .)
	Warnings: Use of NASA logos , insignia and emblems is restricted per U.S. law 14 CFR 1221 . The NASA website hosts a large number of images from the Soviet / Russian space agency , and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI . [1] See also {{PD-Hubble}} and {{Cc-Hubble}} . The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content . Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	日期／時間	縮圖	尺寸	用戶	註解
現時	2007年11月17號 (六) 16:26		3,000 × 2,347 （3.31 MB）	Hashekemist	{{Information \|Description=This inflight photograph of the X-2 (46-674) shows the twin set of shock-diamonds, characteristic of supersonic conditions in the exhaust plume from the two-chamber rocket engine. \|Source=cropped from [http://www.dfrc.nasa.gov/g

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