I have found that in the early stages of discussion, ground cushion puts a
useful picture into the student's mind...we can get into downwash later.

Bob Gardner

"gatt" wrote in message
...

In the book "Takeoffs and Landings" by Leighton Collins--who is referenced
in "Stick and Rudder"--there is no mention of the term
"ground effect."

Rather, Collins talks briefly about "ground cushion" and how air "piles
up" beneath the wings.

Do people still teach this?

-c