"John Kunkel" wrote in message
. ..
Somewhere in my aged memory cells I seem to recall a story about Burt
Rutan and John Rontz collaberating to mount an engine on a sheet of
plywood and tether "flying" it to illustrate that anything will fly with
the correct AOA. I'm not finding any references on the search engines,
truth or myth?

I've never seen that one, but I believe that theory was confirmed with the
video of the flying lawnmower.