The estimation of maximum load capacity of seaplanes and flying boats
This is a 1934 NASA technical report on estimating how much weight seaplanes and flying boats can carry at takeoff, issued for aeronautical engineers and researchers. The single picture is a line graph plotting power loading in pounds per horsepower against the reciprocal of takeoff time in seconds, with a downward-sloping fitted line through scattered data points. A designer could take its clean axes, labelled scales and sparse linear plotting as a model for minimalist technical charts.
