Mary Shafer explained it best many years ago: http://groups.google.com/group/sci.aeronautics/browse_thread/thread/7716ab8ce98106de/f9588208eadf6bb4 http://grou

Mary Shafer explained it best many years ago: http://groups.google.com/group/sci.aeronautics/browse_thread/thread/7716ab8ce98106de/f9588208eadf6bb4 http://groups.google.com/group/sci.aeronautics/browse_thread... It's lift demons.