The Legacy of Flight

Images from the archives of the Smithsonian’s National Air and Space Museum

Otto Lilienthal gliding. (NASM)

HRS-1 Helicopter


Servicemen grapple with a cargo load slung beneath a Marine HRS-1 helicopter during the Korean War. The HRS-1 was the Marine designation for the Sikorsky S-55, which entered service in 1951 just in time for the Korean conflict. It served as a transport helicopter and as an aerial ambulance, although that role was more famously filled by the H-13, which ferried wounded soldiers and Marines from the front lines to Mobile Army Surgical Hospitals, or MASH units.


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