but on the last day I saw that at 50-60 kph helicopter started shuttering .VSI was 2-2.5 and as I add more power the shuttering increased. Can you plz tell me whether it was normal or symptoms of VRS.
Is there any chance that with those vibration i will fall into vortex ring state?? Or its just because of transverse flow effect/loosing ETL. Can I get the explanation?