Now, if you
bank the plane so that one wing is horizontal, that wing will have no
horizonal lift vector component. But, the other wing will have double. The
result is a big, net horizontal force on the plane. This forces the plane
to the center of the turn the way the force in a string swinging a rock
keeps the rock in a circle. That's what makes a plane able to go in a
circle, not the rudder.


Not quite. This does not change the direction of the nose, which is essential
for turning. By itself, what you post would lead to a slip. The plane would
travel in a straight line, at some angle to the nose.

Jose

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