Dudley Henriques schrieb:

Yaw should only be present in the turn dynamic during
the entry into the turn and exit from the turn. Once stabilized in the
turn, there should be no yaw present.

I don't agree. A coordinated turn is *always* a turn around all three
axes. (The only exception is a turn with a 90 degrees bank.) You can
easily demonstrate this by "hand-flying" a toy airplane.