The main rotor is a crucial component of a helicopter, responsible for generating lift and enabling flight. It consists of several blades that rotate around a central hub, creating a difference in air pressure above and below the blades. This lift allows the helicopter to ascend, descend, and hover in place. The design and efficiency of the main rotor significantly affect a helicopter's performance and stability. Different types of main rotors, such as the semi-rigid and fully articulated systems, offer various advantages in terms of maneuverability and control. Proper maintenance of the main rotor is essential for safe helicopter operation.