Sikorsky S-55

The Sikorsky S-55 is an early light helicopter developed in the late 1940s, designed for military and civilian use. It features a twin-blade main rotor and a tail rotor for stability, capable of carrying passengers, cargo, or wounded personnel. Its robust design allows it to perform search and rescue, transport, and training missions. The S-55 was one of the first large helicopters to be widely used, contributing significantly to helicopter aviation's development. Known for its durability and versatility, it laid the groundwork for modern helicopter design and operational capabilities.