Normalized Lift: An Energy Interpretation of the Lift Coefficient Simplifies Comparisons of the Lifting Ability of Rotating and Flapping Surfaces | PLOS ONE
aircraft design - How do Hoerner Wingtips work? - Aviation Stack Exchange
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By Sighard F. Hoerner Fluid-Dynamic Lift: Practical Information on Aerodynamic and Hydrodynamic Lift (2nd Second Edition) [Hardcover]: Sighard F. Hoerner, H. V. Borst: Amazon.com: Books