SACAA CPL(H) Principles Of Flight Practice Questions - SACAA Commercial Pilot Licence (Helicopter) Principles Of Flight Examination Exam

Pitch angle is the angle between the chord line and the tip path plane, whereas AoA is the angle between the chord line and the resultant relative airflow. Pitch angle is measured relative to the total rotor thrust vector, whereas AoA is measured relative to the fuselage longitudinal axis. Pitch angle changes only with cyclic movement, whereas AoA changes only with collective pitch application. Pitch angle and AoA are identical parameters in hovering flight but differ during forward flight.