A study of the effect of a diving start on airplane speed
This is a 1926 technical report from NASA's Technical Reports Server, a study of how a diving start affects airplane speed over a course, with no named audience beyond aeronautical engineers. The single picture is a line graph plotting the ratio of initial velocity to normal velocity against average velocity, with separate curves labelled by course length from 0 to 4 miles. A designer could borrow its clean grid, labelled rising curves and fan of diverging lines as a plain diagram style for showing performance data.
