The Development, Design and Construction of Gliders and Sailplanes
A 1931 technical report from the NASA Technical Reports Server, compiled from German and wider aeronautical research on gliders and sailplanes, written for engineers and aircraft designers. The pictures are black-and-white line drawings and graphs: airfoil cross-sections with lift and drag curves, wing spar structures, flapping-flight diagrams, and planform views of glider wings with dimensions labelled. A designer could draw on the clean technical diagram style and the simple silhouettes of wing profiles and planforms.
