Reduction of wing lift by the drag
A 1932 technical report from NASA's Technical Reports Server, cataloguing aerodynamic research on how drag reduces wing lift. Its two pictures are engineering line graphs, not illustrations, plotting lift coefficient against a ratio labelled d/t with several curves and a labelled reference series. A designer might borrow the clean grid-and-curve plotting style, with its open circle, plus and cross markers and angle-of-attack labels, as a restrained graphic device for data presentation.
