Stresses Produced in Airplane Wings by Gusts
A 1932 NASA technical report on how gusts load and bend airplane wings, written for aeronautical engineers and researchers. Its pictures are engineering graphs of wing deflection and acceleration response curves, plus a diagram of a wing's mass distribution and a statical deflection curve for a wing. A designer could take from them the visual grammar of dense technical plotting: dashed reference lines, families of solid curves labelled by parameter, and labelled axes in units of metres and seconds.
