The compensation for phase lag can be built into the control run as an advance angle, meaning that control input is made to occur "in advance" of the desired effect by having the input point on a pitch change arm ahead of the blade.

Thus, Advance Angle is the angle between the pitch link attachment on the swash plate (or circumferential control rod) and the longitudinal axis of the rotor blade.

The size of the advance angle depends on how well the blade responds to flapping. On most two-bladed rotor systems, especially those with stabiliser bars, the pitch change arm leads the blade by 90°.

Advance angle can also be used to correct for Inflow Roll (later) in forward flight.