Rotary wing aircraft, commonly known as helicopters, are types of aircraft that use rotating blades to generate lift and thrust. Unlike fixed-wing aircraft, which rely on wings for lift, rotary wing aircraft can take off and land vertically, hover in place, and maneuver in tight spaces. This makes them ideal for various applications, including search and rescue, medical transport, and military operations. The main components of a rotary wing aircraft include the main rotor, which provides lift, and the tail rotor, which counteracts the torque produced by the main rotor. These aircraft can vary in size and design, ranging from small, single-engine helicopters to larger, multi-engine models used for heavy lifting and transport.