Rotor blades are essential components of helicopters and some types of drones. They are long, flat structures that rotate around a central hub, generating lift and allowing the aircraft to ascend, descend, and maneuver in the air. The design and material of rotor blades are crucial for their performance, as they must withstand various aerodynamic forces during flight. The shape of rotor blades is typically streamlined to reduce drag and improve efficiency. They can be made from materials like composite fibers or aluminum, which provide strength while keeping weight low. Proper maintenance of rotor blades is vital for safety and optimal operation of the aircraft, ensuring they function effectively during flight.