SACAA PPL (H) Principles Of Flight Practice Questions - SACAA Private Pilot Licence (Helicopter) Principles Of Flight Examination Exam

Pitch angle is the angle between the blade chord line and the reference rotor hub plane, whereas Angle of Attack is the angle between the chord line and the resultant relative airflow. Pitch angle is measured between the chord line and the relative airflow, whereas Angle of Attack is fixed by the swashplate position. Pitch angle varies with relative wind velocity, while Angle of Attack is controlled strictly by the pilot's collective position. Pitch angle and Angle of Attack are identical under all flight conditions including hovering and autorotation.