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Old 2nd May 2012, 17:23
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Lyman
 
Join Date: Aug 2011
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I learned from an old Navy pilot. His brand of heresy never left me. An aircraft in flight is not lifted by the upper surface, it is pushed, from beneath. The upper surface is not relevant to flight, except to say that it provides a place for the underside to rest against.

"Nature abhors a Vacuum". Captain Jim said that was because there is no such thing as a vacuum And Nature does not recognize that which is not.

The nature of flight has to do with creating differences in ambient pressures, not in establishing a "vacuum". Although, strictly speaking, the pressure is not relevant either, just as any inclined plane will lift an object.

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"Camber produces drag, and with greater drag on the upper surface, the lower surface is in dynamic "tripping over" the upper, and creates an angle of "Up"."
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