Drag of C-Class Airship Hulls of Various Fineness Ratios
A 1929 NASA technical report on wind-tunnel drag tests of C-class airship hull models, published for aeronautical engineers and researchers. The pictures are dense engineering graphs of air speed in miles per hour plotted against resistance in pounds and shape coefficient, with straight diagonal lines, labelled curves, and small schematic hull outlines. A designer might take the disciplined grid layouts and clean line-chart typography as a model for technical data graphics.
