Re: Stalls

From: (Terrell D. Drinkard)
Organization: Boeing Commercial Airplane Group
Date:         27 Apr 94 01:22:26 
References:   1 2 3
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Kyle D. Jackson <> wrote:
>I had the understanding that the commercial transport aircraft were designed
>with supercritical airfoils to completely avoid the chance of a sonic shock
>forming on the upper wing surface...

Not so.  The supercritical airfoil delays the formation of the shock, and
allows placement of the shock to some extent, but does not eliminate it.
All commercial jet transport wings form a weak shock on the upper surface
during cruise, as far as I know.

"Anyone who thinks they can hold the company responsible for what I say has
more lawyers than sense."