ORIGINAL: Shadog1962
I have joined Radd's school of flying and I have notice the same thing another poster commented on, that the heli wants to slide left even when inputting right aileron, it only goes right when you increase the head speed and it actually starts to fly a little on the right skid.
That would make sense, since the tailrotor is pushing to the right to counteract the torque of the main rotor. The only way this left movement can be counteracted is by the main rotor tilting to the right slightly while it is providing positive lift.
If you notice the copter in a hover, it will be tilted to the right for the same reason.