Assumptions for thin airfoil theory

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Foundations of aerodynamics: bases of aerodynamic design. Kuethe, Arnold Martin Chow, Chuen-Yen (1976).Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 'The Effect of Compressibility on the Lift of an Aerofoil'.

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(1940), 'Ebene und räumliche Strömung bei hohen Unterschallgeschwindigkeiten: Erweiterung der Prandtl'schen Regel', Lilienthal Gesellschaft (in German), Berlin: Zentrale fuer Wissenschaftliches Berichtswesen (127)

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Plot of the inverse Prandtl–Glauert factor 1 / β The more correct nonlinear equation does not exhibit the singularity.

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