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There is still gross lift at any tangent of the teardrop shape. The opposing tangent counteracts it, but that doesn't mean it doesn't exist.
It's like saying that because you're putting 5 lbs of pressure in two opposing directions, you're not putting any pressure anywhere. That's exactly what you've said here.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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