Could it be refraction because of the different air flow
characteristics? I recently took a flash picture of a boy playing "air
drums". On the wall behind him is a shadow of the disturbed air
following the path of the drum sticks.
Gregg
Ken Norton wrote:
>
<snip>
> I thought about the supersonic transition boundry theory for a bit and that
> is a possibility. Since the plane is cruising at a speed relatively close
> to the speed of sound, the increased airflow speed over the wing can
> approach, if not exceed the sonic limit, thereby creating either a caviting
> of the atmosphere or a shockwave that is maintained at that point. I do
> not believe it to be a separation of the laminar flow as that would occur
> near the wing itself.
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