If you would like to learn more about aerodynamics, these books are a good place to start. These are mostly meat - very little “sizzle”, so be prepared to engage your brain!
Theory of Wing Sections, Ira H. Abbott and Albert E. Von Doenhoff, Dover Publications, Inc., New York, N. Y., USA, 1959.
Theoretical Aerodynamics, L. M. Miline-Thomson, Dover Publications, Inc., New York, N. Y., USA, 1973.
Radio Control Soaring, Dave Hughes, Radio Control Publishing Co. Ltd., England, 1977.
NACA-TR-648, Design Charts for Predicting Downwash Angles and Wake Characteristics Behind Plain and Flapped Wings, U.S. Department of Commerce, National Technical Information Service, Langley Memorial Aeronautical Laboratory, Langley Field, VA, USA.
Model Aircraft Aerodynamics, 3rd Edition, Martin Simons, Zenith Books (800-826-6600)