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#5
November 29th 03, 02:17 AM
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On Fri, 28 Nov 2003 21:36:17 +0000, cddb wrote:
Don't think so. Gravity provides the thrust. Quite noticeably when fuselage is pointed vertically. None at all when fuselage/wing is horizontal. Look at it from another point of view. If all forces are balanced and winglets are added, drag is reduced. Then velocity increases until the thrust/drag forces are equalized. The result of increased velocity is additional lift. The horizontal component of the lift vector is thrust, which increases as lift increases. Ergo, winglets produce thrust. ;) LittleJohn Madison, AL 
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