Milt
But would you mind telling us why you think the rudder yaws an aircraft in steady flight around the CG and perhaps what is the alternative point of rotation?
I didn't state that. I stated that if you consider the motion around the vertical axis going trough the CoG (that is take as a reference point the CoG ) this is NOT stating the rotation point is the CoG.
I realize that inertial forces and aerodynamic ones are quite different.
But unless you are capable to change the physical dimensions of the plane in mid flight the only thing you have to play with is the CoG and as soon as you bank you do not escape from the fact that gravity will have an influence in balancing all horizontal forces whatever the reference point you will use.
Maybe the way to walk around this problem is to assume the aircraft has no mass at all and after that introduce the concept of CoG. This will put all aero and engine forces on the front first.
All this in steady state of course.