The Design of Plywood Webs for Airplane Wing Beams
This is a 1931 technical report from the NASA Technical Reports Server on designing plywood webs for airplane wing beams, written for aeronautical engineers and test staff. Its two photographs show a testing press loading a short beam section with shearing force, and its graph plots shear stress against web thickness, with load-weight ratios, as a set of dashed and solid curves. A designer might take from it the stark, grey, machine-shop look of mid-century engineering testing, and the clean chart style of plotted curves with labelled points.
