Quite rare, and non-turbo models (sketch above) are probably parked for the duration. High cockpit; long, low, straight fuselage merging into tail cone. Side windows vary, six most common; twin "nostril" airscoop for turbosbaft engine.

Successor to the S-55, built in the United States during the 1950s with piston engines. The British-built Westland S-58s had turboshaft engines from the beginning, an idea taken up a decade later here. Although all S-58 production stopped in the early 1960s, Sikorsky continued turbo conversion sales into the late 1970s. About 100 still flying, most now in utility, rather than passenger, roles. Common troop carrier early in Vietnam War.