Loss of Tail Rotor Effectiveness (LTE) - Wind Regions
Weathercock (120o- 240o) - Aircraft will weathervane into wind. A/C will make slow left & right uncommanded yaws. The right raw can develop into LTE and requires immediate corrective action by the pilot.
Vortex Ring State (210o - 330o) - Develops around T/R which causes T/R thrust variations. The Helicopter will make uncommanded pitch, roll & yaw excursion. Work load will be high and it will be impossible to maintain precise heading control.
Disk Vortex State (280o - 300o) - (Winds 10 to 30 knots) will cause main rotor tip vortices to be directed into the T/R. The T/R will operate in an extremely turbulent environment & can make a sudden uncommanded right yaw.