On the determination of the take-off characteristics of a seaplane
This is a 1938 NACA technical memorandum from the NASA Technical Reports Server, issued for aeronautical engineers and researchers studying seaplane take-off performance. The pictures are graph-paper engineering charts with plotted curves, numbered figures and labelled axes, showing how hull and float variables relate to take-off behaviour. A designer might take from them only the grid-and-curve chart language, a spare technical diagram style with annotated scales.
