Question id 674 - Principles of Flight (Helicopter) - PPL(H) - Private Pilot License

Transition point starts moving towards the airflow direction
Boundary layer on the upper side of the rotor blade begins to separate
Boundary layer on the lower side of the rotor blade begins to separate
Laminar boundary layer turns into a turbulent boundary layer

Training tests and timed exam simulations PPL(H) - Private Pilot License