Experiments with airplane brakes
A 1931 NASA technical report on experiments with airplane brakes, compiled from the NASA Technical Reports Server and intended for aeronautical engineers and brake designers. The pictures are engineering charts and graphs: braking torque curves plotted against friction coefficient, deceleration against time of rolling, and dynamometer force records with bar and line plots of braking force against pressure. A designer might take from them the plain graph conventions of 1930s technical reporting, with labelled axes, numbered curves and hatched bands.
