Originally Posted by
SMACFUM
Next, I have the student execute the exact same aileron rolling, but now emphasize using the rudder to keep the nose stationary in relation to a point on the horizon while rolling back and forth. Now we are using the rudder to cancel out the adverse yaw (slip), and can see the ball stays centered in the inclinometer, and we are making a coordinated turn.
Actually, no, that's not coordinated. You are basically saying (teaching that method) that aircraft start to turn (change heading) AFTER you reach a desired bank angle. Care to justify that?
Think about it, as you start to roll into a turn, the airplane SHOULD be turning, IF it's coordinated (why wouldn't it turn?). It should be turning at the rate for 10 degrees of bank (while coordinated) when you go through 10 degrees of bank. It should be turning at the rate for 15 degrees of bank when you go through 15 degrees of bank. Although the above described "exercise" has been practiced since Orville and Wilbur took to the skies, it's not "coordinated" to roll into a turn and keep the nose stationary on a point (in terms of heading).
Next time you do this exercise, look very closely at the ball.