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Old Mar 03, 2004, 07:56 PM
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758 Posts spanwise flow has lift but the section is a flat plate. So if we take the airflow as having 2 components - flow perpendicular to the quarter chord and spanwise flow, and apply the airfoil section characteristics to the former and flat characteristics to the latter we have a reasonable approximation of how the wing will perform. ( Its an approximation because we are leaving out the interactions and other inconeniences)

Close enough?


PS Thanks to you guys my understanding has improved by leaps and bounds from the time I designed airfoils for control line combat and stunt planes using and ellipse template and french curves. BTW is there a name for an airfoil with an elliptical front and a sections of a circle for the rear?
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Last edited by shaneyee; Mar 03, 2004 at 08:08 PM.
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