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चित्र:Equal transit-time NASA wrong1.gif

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सारांश

विवरण
English: There are many theories of how lift is generated. Unfortunately, many of the theories found in encyclopedias, on web sites, and even in some textbooks are incorrect, causing unnecessary confusion for students.

The theory described on this slide is one of the most widely circulated, incorrect explanations. The theory can be labeled the "Longer Path" theory, or the "Equal Transit Time" theory. The theory states that airfoils are shaped with the upper surface longer than the bottom. The air molecules (the little colored balls on the figure) have farther to travel over the top of the airfoil than along the bottom. In order to meet up at the trailing edge, the molecules going over the top of the wing must travel faster than the molecules moving under the wing. Because the upper flow is faster, then, from Bernoulli's equation, the pressure is lower. The difference in pressure across the airfoil produces the lift.

Source: [1]

Image was cropped from original slide.
दिनांक
स्रोत en:File:Equal_transit-time_NASA_wrong1.gif
लेखक NASA
अनुमति
(इस चित्र का पुनः उपयोग करना)		 PD
दूसरे संस्करण Derivative works of this file:  Equal transit-time NASA wrong1 es.svg

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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वर्तमान18:32, 1 जून 200918:32, 1 जून 2009 के संस्करण का थंबनेल संस्करण586 × 264 (4 KB)Retama{{Information |Description=There are many theories of how lift is generated. Unfortunately, many of the theories found in encyclopedias, on web sites, and even in some textbooks are incorrect, causing unnecessary confusion for students.

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