The UH-19B is a USAF version of the Sikorsky S-55, an aircraft used by all U.S. military services in the 1950s and 1960s. It was the first of the Sikorsky helicopters with enough cabin space and lifting ability to allow satisfactory operation in troop transport or rescue roles. The UH-19B on display is painted and marked as an H-19A known as "Hopalong", one of two H-19s to make the first trans-Atlantic helicopter flight, traveling during the summer of 1952 from Westover AFB, Massachusetts to Scotland.
