Spanwise loading for wings and control surfaces of low aspect ratio

John DeYoung
naca-tn-2011
Jan 1950


The boundary conditions for low-aspect-ratio wings are approximately satisfied by a two-dimensional vortex sheet that extends to infinity fore and aft. Since the downwash is constant fore and aft, the boundary condition that no flow passes through the wing or flat plate is satisfied simply by the familiar downwash integral used in line-theory loading methods.

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http://naca.central.cranfield.ac.uk/reports/1950/naca-tn-2011.pdf