my mistake i thought "us configiration" was clockwise rotors.
you said: If the tail rotor was such a major player, each time you put an input in yaw you would get a roll in the opposite direction - in fact the opposite happens (eg yyaw left - roll left)due to changing the relationship of the control orbit to the direction of travel.
not realy! a yaw in direction of rotation even in hover will cause a roll in the same direction, not opposite. the reason it affects roll so much in flight is flap back. if the cyclic is held at the same compass direction during a yaw roll wont occer.
