Posted for "rtitsworth" <rtitsworth@mindspring.com>:

 Opps, I hit send while still editing.  Append the following to the bottom of
 the text below.
 
 The leading edge votex changes shape/direction with the wing planform.  At
 the tip the vortex it is bent rearwards (perpendicular to the tip edge -
 just like it is perpendicular to the leading edge along the wing spanwise.
 Wake vorticies are an additional / continued manifestation of that vortex
 action/flow.

"""
 As AOA and/or airspeed is increased this spanwise horizontal votex becomes
 more energized - i.e. more lift.  When the AOA gets too large the votex is
 spoiled and the lift effect is reduced/gone (i.e stalled)
"""