Normal tendency of helicopter with counter clockwise rotating main rotors (top view) with force trim off and leaving controls? Is it normal for the helicopter with CCW rotating main rotors to pitch down and roll left in forward flight, when force trim is turned off and hands off the cyclic?
Moreover, when we put the helicopter in right bank, would it tend to return to straight &amp; level / left bank after a few seconds when hands off the cyclic (force trim off)?
By forward flight I mean 80 to 100 kts
With a American made helicopter equipped with a CCW rotating rotor, the helicopter will, as it accelerates past 10-15 KIAS, begin to pitch nose up as well as roll to the right.  This is a direct result of Effective Translational Lift (ETL) as well as Transverse Flow Effect.  Airflow through the main rotor disk past these speeds begins to take a more horizontal flow through the rotor disk, increasing lift on the advancing side of the rotor disk resulting in this.  European made helicopters with a CW turning main rotor will have a tendency to still pitch up as ETL becomes effective but will roll left due to gyroscopic precession from a greater lift imbalance on the front of the rotor disk being applied to the right side of the disk.