Plastics as structural materials for aircraft
A 1937 technical report on plastics as structural materials for aircraft, published through the NASA Technical Reports Server and drawn from its engineering archive for aeronautical engineers. The two pictures are plain engineering graphs: a stress-versus-extension curve rising steeply to an ultimate strength of 25,300 pounds per square inch, and a set of extension curves for hardening stresses plotted against stress in pounds per square inch. A designer could take from them the restrained line-and-grid vocabulary of mid-century technical charts, with labelled axes and annotated values.
