Simple formula for estimating airplane ceilings
A 1922 NASA technical report giving a simple method for estimating airplane ceilings, compiled from the NASA Technical Reports Server for aeronautical engineers. The single picture is a dense nomogram plotting wing loading against power loading, with curved family lines labelled with ceiling values and a scatter of marked points. A designer could take from it the look of a dense engineering chart: a grid of gently curved diagonal lines, labelled contour values, and a plotted point, useful for technical diagram textures.
