The effect of trim angle on the take-off performance
A 1934 NASA technical report on seaplane take-off performance, issued by the agency's technical reports service for aeronautical engineers and researchers. Its pictures are plain engineering line graphs of water speed, resistance and trim angle, with curves marked by solid, dashed and dotted lines. A designer could take from them the restrained grammar of technical charts: sparse grids, labelled axes and multi-series curves that show trade-offs.
