1. Anhedral reduces an airplane's Cl/beta, rolling moment due to sideslip where Cl is rolling moment and beta is the airplane's sideslip angle

2. Sideslip, sharp steer and obit deviation are the often occurrence of accidents during this process.

3. In the controller, the assisted motor angle is controlled by the feedback of yaw sideslip angle.

4. This yawing moment can be aerodynamic (sideslip angle, rudder, adverse yaw from the ailerons), thrust related (p-factor, one engine inoperative on a multi-engine non-centreline thrust aircraft), or from any number of possible sources of yaw.