Jim wrote:
...
In a descending turn, which is what gliders do in turns, it is not the
case that both wings have the same vertical component of velocity. In
a stable descending turn the inside wing is always undergoing a
downward motion relative to the outer wing. This is one cause for the
inside wing to be at a higher AOA than the outer wing, and one reason
for the resulting earlier stall than the outer wing. In an ascending
turn, power airplanes I guess, it is the outer wing that is always
undergoing a downward moovement relative to the inner wing.

I found this difficult to visualize at first, but if you try "flying"
a stable descending "turn" with your hand you will experience it
clearly.


Can't understand that. If both wingtips have a different vertical component
of velocity, the vertical distance between them should change,
increasing the bank angle if the inner wing sinks faster than the outer
one. This difference must anyway stop at 90 degrees bank. But as long
as the bank angle remains constant, both wings should have the same
vertical component of velocity.