What is the function of the main rotor on a rotorcraft?

The primary function of the main rotor on a rotorcraft is to provide the necessary lift for flight. The design and operation of the main rotor enable it to generate lift by creating a difference in air pressure above and below the rotor blades as they rotate. This lift is crucial for allowing the rotorcraft to ascend, descend, and maintain its altitude during flight.

Understanding the dynamics of rotor systems is essential since they are the primary means by which rotorcraft overcome the force of gravity. The lift generated by the main rotor must be sufficient to support not only the weight of the aircraft itself but also any additional payload.

While stabilizing the aircraft in turbulent conditions, reducing noise, and handling emergency landings are important considerations in rotorcraft operation, they are not the main functions of the rotor system itself. The main rotor's lift-generating capability is foundational for any rotorcraft's ability to fly, making it the most pivotal element in rotary-wing flight operation.