What is the effect of vortex ring state?

Question

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

QuizVDS · Accepted Answer

High rate of descent and irregular pitch, roll, and yaw motions

QuizVDS · Answer

Stable descent and high-frequency vibrations in the helicopter

QuizVDS · Answer

Decreased rate of descent and strong vibrations from the engine

QuizVDS · Answer

Fluctuations in rotor and engine RPM

Id 709 - PPL(H) EN - What is the effect of vortex ring state?