However, because wings come in various shapes the aspect ration is the wing span divided by the mean wing chord. The formula for this is:
The aerodynamic aspect ratio is measured between the cores of the wingtip vortices that occur at about 80% of the geometric wingspan when the wing is outside ground effect. The aerodynamic aspect ratio of a wing has a strong inverse effect on lift induced drag.
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Created December 9, 2009. Updated September 21, 2013.