An analysis of longitudinal stability in power-off flight with charts for use in design
This is a 1936 NACA technical report on longitudinal stability of aircraft in power-off flight, written by NACA engineers for aeronautical designers and researchers. Its pictures are dense graph charts plotting rotational damping factor against static stability factor, with curved and straight loci labelled by damping ratio values, and a designer might take from them the layout of multi-panel stability diagrams for comparing aircraft configurations at a glance.
