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[quote]QUOTE: Originally posted by macguy How do they keep it from taking off? [/quote] Awwww Grasshopper. [;)] Your assignment is to look up the following words and therein find your answer. Venturi Bernoulli (Daniel) Airfoil (wing) Lift Hint -- It is not necessary for air to pass through an enclosed tube for Bernoulli's Principle to apply. A surface that alters airflow causes a venturi effect. A majority of "lift" is created by the result of the decreased pressure above the wing rather than the increased pressure below it. The remaining "lift" is provided by the wing's lower surface as air striking the underside is deflected downward. The air that is deflected downward produces an upward "lifting" reaction (Newton's Third Law Of Motion). To put it all in very simple terms, no airfoil, no lift, no flight. [;)] [8D] [:)] It might fly "down" the track, but it won't fly "over" them. [:p] [:D] (Sorry, just couldn't resist this one. [:D] )
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