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bird's flight

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bird's flight

Postby chenglorraine » Mon Dec 25, 2006 3:34 pm

Ok this might sound REALLY darf to you guyz......but why does air moving over the top of a bird's wing has further to go than the air moving underneath and HENCE TRAVELS FASTER? :?
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Re: bird's flight

Postby zami'87. » Tue Dec 26, 2006 5:09 pm

You should find the answer in physics textbook.As I remember it has something to do with the Bernoulli equation(p1+0.5*rv^2+rgh=const..if h1=h2 same height then p+0.5*rv^2=p’+0.5rv’^2 and represents conservation of energy..r is density here….higher velocity of the air molecules on the top of the wing and thus lower pressure on the top, and smaller velocity on the bottom and higher pressure so the result is upward force… that’s why when u blow across paper sheet it will lift,and that’s why preirie dogs make openings on different altitudes so there is a ventilation with air flowing from lower opening(higher pressure) to higher opening(where the pressure of air is lower)..etc
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