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Finite Wing Theory, also known as Prandtl's Lifting Line Theory, accounts for the lift distribution along a wing with a finite span, showing that its lift is less than that predicted by two-dimensional airfoil theory due to induced drag and vortices at the wingtips. It provides a means to determine the overall lift and drag characteristics of real wings by considering both planar and non-planar effects encountered during airflow over a finite wing surface.
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