Reduction of lift of a wing due to its drag
This is a 1935 NACA-style aeronautical technical report on reducing a wing's lift because of its drag, drawn from NASA's Technical Reports Server and aimed at aerodynamic engineers rather than general readers. The three pictures are engineering charts: two plot Reynolds number against x on suction and pressure sides with families of dashed and solid curves labelled by angle in degrees, and one plots a variable n against x with hatched curves and numbered branches. A designer could borrow their clean grid-and-curve graphic language, with labelled sparse axes and graduated line families, for technical diagrams.
