The Sikorsky S-58 is a medium-lift helicopter designed by Sikorsky Aircraft Corporation in the late 1940s. It features a single main rotor and a tail rotor, providing stability and control during flight. The S-58 was primarily used for military and civilian purposes, including transport, search and rescue, and utility missions. First flown in 1954, the S-58 has a maximum capacity of around 12 passengers or 3,000 pounds of cargo. Its robust design and versatility made it popular among various operators, including the United States Navy and commercial airlines. The helicopter remains a significant part of aviation history.