Which rotor blade experiences a greater lift during flight?

The advancing rotor blade experiences greater lift during flight due to its unique position and relative motion in relation to the direction of flight. As the helicopter moves forward, this rotor blade travels into the oncoming airflow, increasing its relative airspeed. The combination of increased airspeed and the angle of attack leads to a greater lift production on this blade compared to the retreating blade, which is moving away from the direction of flight and thus experiences decreased relative airspeed and lift.

In a practical sense, the difference in lift between the advancing and retreating rotor blades is crucial for the stability and control of the helicopter during flight. Understanding this aerodynamic principle is essential for pilots and engineers in ensuring optimal performance and safety in rotorcraft operations.