I'll take the plunge.
G'day
Milt
In the banked,
central rudder, steady, straight, unaccelerated, level flight case there must be a slip to balance the horizontal component of lift. No worries there.
In the banked,
deflected rudder, steady, straight, unaccelerated, level flight case can't the balancing force to the component of lift come from the rudder. Why do we have to rely on the keel surfaces and directional stability of the aircraft to balance the forces?