The structure of airplane fabrics
A 1920 technical report on the structure of airplane fabrics, issued by the NASA Technical Reports Server from a federal aeronautics research record and aimed at engineers testing aircraft cloth. Its pictures are plain line charts: stretch-load diagrams drawn on ruled grids, and a bar-and-line chart comparing fabrics by tear and tensile strength. A designer might take from them the look of dense graph paper grids, sloping curves and labelled axes as a neutral technical graphic device.
