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Old 06-01-2014, 09:00 PM   #38 (permalink)
gone-ot
...beats walking...
 
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ANALOGY - imagine this airplane WING airfoil as a car (lefthand pix):




...or, think about this being UPSIDE down, and think what the inverse of LIFT-INDUCED drag would be (DOWN-FORCE drag!):


Last edited by gone-ot; 06-01-2014 at 09:18 PM..
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