Edit: Having brushed the dust off my PoF notes, a yawing moment is referred to with regards to the affect of the tail fin during a turn. Nothing more is said about it except that it exists.
Adverse yaw is mentioned during a turn, due to the difference in lift coefficient and hence induced drag between the outer and inner wing.
I guess the adverse yaw is greater than the yaw due to the tail fin hence the need to balance a turn.
Last edited by Gutter Airways; 9th Jul 2010 at 16:18.