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While using the Bernoulli's equation to deduce the upthrust on an aircraft , a statement is always made that

The air particles going above th wing have to cover a greater distance in same time than those going below, so they travel at a higher speed which causes the pressure difference.

But why do they have to cover greater distance?
Why do the particles have to meet at the ends of wing again?

Qmechanic
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Divyanshu Agarwal
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1 Answers1

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You are right to ask why it is true, because it is not true.

Many people have heard it and repeated it, but it has a name: The "equal time fallacy".

There is an excellent discussion here about why it is not true, and airplanes would not work if it were.

Mike Dunlavey
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