The Probert Encyclopaedia of Aircraft

SIKORSKY S-61

The Sikorsky S-61 is an American civilian all-weather amphibious helicopter. The Sikorsky S-61 is powered by two General Electric T58-GE-6 engines providing a cruising speed of 239 kmh and a range of 185 km. The Sikorsky S-61 carries up to 25 passengers.
Military versions, designated RH-3 and SH-3 Sea King are also produced as amphibious, all-weather anti-submarine helicopters.
Research Sikorsky S-61