Application and Testing of Transparent Plastics Used in Airplane Construction
This is a 1938 NACA technical report by the NASA Technical Reports Server, a government aeronautics research publication on transparent plastics for aircraft canopies and windows, written for engineers and aircraft designers. The pictures show fractured glass and plastic test panels after impact, an aircraft gun turret viewed through its framed transparent panels, and a stress curve plotted in kg/cm² on a grid. A designer could draw from the stark fracture radial patterns, the faceted cockpit window geometry, and the clean graph style of a technical engineering document.
