Thanks John, I see what you're saying there, but don't the control surfaces only control pitch. roll and yaw?
In level flight the average angular momentum is zero about any axis (not including the effects of the curvature of the earth) so if you're flying along up high S+L and you turn on your wing leveler which develops a limit cycle oscillation (in roll) that wouldn't have occured down at sea level, how is that related to the aircraft's momentum or kinetic energy in the translational sense?