Soubor:Sikorsky HNS-1 at the Langley Research Center in March 1945.jpg

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Popis	English: A Sikorsky YR-4B (c/n 29, USAAF s/n 43-28229) at the NACA Langley Memorial Aeronautical Laboratory at Hampton, Virginia (USA). This aircraft was initially ordered in 1943 by the USAAF, and still carries the original serial number. It had been transferred to the U.S. Navy and officially received the designation HNS-1 (BuNo 39034). It was test flown at Langley in March 1945. Jack Reeder, the NACA's first helicopter pilot, is at the controls. This "Hoverfly" was also used for pilot training in rotary winged flight.
Datum	29. března 1945
Zdroj	NASA Langley photo EL-2003-00296
Autor	NACA Langley

	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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	Datum a čas	Rozměry	Uživatel	Komentář
současná	14. 5. 2015, 19:07	2 882 × 2 038 (2,22 MB)	Cobatfor	levels
	14. 5. 2015, 19:05	1 454 × 1 027 (622 KB)	Cobatfor	frame cropped
	12. 2. 2012, 01:56	1 536 × 1 228 (193 KB)	FlugKerl2

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