The aerodynamic properties of thick aerofoils suitable for internal bracing
This is a 1920 technical report from NASA's Technical Reports Server, a set of aerodynamic test plots of thick aerofoil sections meant for internal bracing in aircraft wings. The plots chart lift coefficient against angle of attack and thickness ratio, drawn as grid-ruled line graphs with labelled curves. A designer would find here only the plain visual grammar of engineering data: dense graph paper, numbered curves, and sparse axis labels, useful as a source for minimalist chart layouts.
