NASA-LARC / SCIENCE PHOTO LIBRARY NASA-LARC / SCIENCE PHOTO LIBRARY
Sikorsky HNS-1 hoverfly helicopter. This helicopter, designed by Igor Sikorsky, was the world's first mass-produced helicopter. It was also the first helicopter to land aboard a ship and performed the first rescue by helicopter. It was used by the US Navy, US Army, US Coastguard, Royal Navy and the RAF. Photographed at Langley Air Force Base, Virginia, USA, in January 1944.
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