Completely agree, but the torque tendency of the tail couples to the lateral axis affecting pitch much the same way the torque tendency of themain rotor couples to the vertical axis causing yaw, which is countered by the angular velocity of the tail rotor.

Phil, I think were both saying the same thing but were using different language to describe it. I'm getting confused when you use the term precession torque, and in my mind thats those are two different forces. Torque Tendency (like the main rotor applying force to the heli causing it to yaw about the vertical axis in the direction of travel) and Gyroscopic Precession where a force applied to any spinning object will cause an interaction 90degrees in advance of the direction of travel, and parallel to the original forces vector.

Assuming were on the same page (I think!), I still dont see how a turbine could act with sufficient force to prevent the full mobility of the heli.