The forces and moments acting on parts of the XN2Y-1 airplane during spins
This is an aeronautical engineering report from 1937, issued by the NASA Technical Reports Server collection and describing forces and moments on a specific aircraft during spin tests, written for aerodynamics engineers and researchers. The pictures are plain black-and-white technical plots: one page of side and top line drawings of an airplane with arrowed force diagrams and small graphs, and one chart of coefficients against angle of attack with data points and labelled curves for wing, fin, rudder, fuselage and inertia. A designer could take their stark graph-paper grids and hand-plotted symbols as a restrained, diagrammatic visual language.
