A helicopter is a type of rotary-wing aircraft designed to generate lift through the rotation of one or more main rotor blades. This system utilizes airfoil principles to convert rotational mechanical power into aerodynamic thrust, allowing the vehicle to achieve vertical takeoff and hover flight, capabilities largely absent in fixed-wing aircraft. The operational mechanics rely on the transfer of torque from an engine to the rotor mast, enabling precise control over altitude, lateral movement, and orientation in three dimensions. Due to its unique flight profile, it is employed in diverse fields, including transport, rescue, and infrastructure inspection.