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Old October 8th 07, 10:36 PM posted to rec.aviation.piloting
Gig 601XL Builder
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Default Backwash Causes Lift?

Le Chaud Lapin wrote:

Because the turbulent air on top of a wing during a stall pushes down
on the wing harder than does when the airflow non-turbulent.


You really need to look at some video of Tuft testing.

Here's one to start with.

http://www.youtube.com/watch?v=zrwlpHE7P8Q