If a single-rotor helicopter is in forward horizontal flight, the angle of attack of the advancing blade is?

In forward horizontal flight, the advancing blade of a single-rotor helicopter experiences a higher relative airflow compared to the retreating blade due to the movement of the helicopter through the air. This increased airflow over the advancing blade results in a greater angle of attack for that blade.

Specifically, the advancing blade's increased speed enhances lift and performance, allowing it to handle the demands of forward flight more effectively. Meanwhile, the retreating blade, moving against the relative wind, sees a decrease in effective airflow, leading to lower lift and a reduced angle of attack. Therefore, the angle of attack of the advancing blade is indeed more than that of the retreating blade in forward flight. This phenomenon is critical in understanding lift distribution across the rotor blades and is a fundamental aspect of helicopter aerodynamics.