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The conventional or standard explanation of aerodynamic lift states the higher streaming velocity at the upper side of the airfoil as cause of the lower pressure, due to Bernoulli’s law. But a higher streaming velocity is the effect of a lower pressure and never its cause. The cause of the aerodynamic lifting force is the downward acceleration of air by the airfoil - which depends on the angle of attack and its velocity.
In relation to the airfoil the normal acceleration of the air in case of curved streamlines must be regarded which results in pressure gradients perpendicular to the streamlines and reaction forces acting perpendicular on the deflecting surfaces
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Unit
VII: Lab 1
Examination
VIII
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Hello,
Aaron and I are 11th. Grade students in Mr. David A. Young’s Physics
A class at Fayetteville High School in Fayetteville, Arkansas. We had to create
a web page in this class as part of the curriculum. We’ve enjoyed this class
very much and feel that we’ve learned a lot not only about physics but about
other things, this web page for instance is completely a new thing for us,
neither of us have ever created one but have learned to do so in this class.
It’s been a fun year and now it’s coming to a close, but the things we’ve
learned in this class should stick with us for quite sometime.
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Physics
Last revised: 5/21/03