Phil,
Yes, in racing sideward to the left at terrific speeds, you pass through VRS and then go to a windmill brake state on the TR (it is actually autorotating!) It is obviously where the TR downwash equals the sideward speed, in an S76 that is about 30 to 35 knots, in an Agusta 109 it is about 25 knots.
Pilots often see this in big winds in a pedal turn, when they experience a big pedal shift, usually when the aircraft behaves like it is jumpy and nervous in yaw.
delta3,
Sounds like you are doing very nicely with the simulation. Thanks for the insights!
Nick