It would appear that someone modified the tail rotor characteristics at slow speeds but in the wrong direction. Before the change, the Pawnee and Hummingbird tail rotor's aerodynamics characteristics were correct. That is, as the forward velocity increases, the tail's rudder effects take over and dominate. In the slow speed regime, say zero airspeed, the tail rotor must have no reliance on velocity and be totally effective (using rudder inputs). Unfortunately, someone changed these relationships and reduced the effectiveness to near nil when the helos are at zero airspeed (i.e. in a hover). In a hover, the tail rotor is set to zero trim and with no rudder input, the aircraft maintains heading. However, (and this is where the problem has surfaced), any rudder input must give a totally responsive reaction and the nose rotated freely. For some incorrect reason, this doesn't happen until around 20-30 kts. It should be maximum at zero knots, not 20 or 30. This change makes the helicopters far less maneuverable in the slow speed regime when maximum control is mandatory (takeoff and landing). I suspect and fear that this "padding" of the true, responsive, normal characteristics is the result of complaints and whining that helicopters are "too hard to fly". This this padding is in effect a sort of "dumbing down" of the realism in favor of players who will not invest the time and effort to learn how to master the "realism". I thought that realism and immersion were hallmarks of ARMA3 but such changes to what was a fairly accurate aerodynamic model are instead turning a good vehicle into a huge disappointment for those who pride themselves in having invested the time and effort to master one of the many ARMA3 challenges. If this change is not reversed or, even worse, it continues, this becomes a much simpler matter. Why spend the time with ARMA3 if it becomes on par with BF in terms of immersion and realism?