Aerofoils and Aerofoil Structural Combinations
This is a 1918 report from the US National Advisory Committee for Aeronautics, catalogued by NASA's Technical Reports Server, covering aerofoil shapes and their structural combinations for aviation engineers. The pictures are full-page engineering plots on squared graph paper: fine grid lines, curved traces, and small printed captions, all in grey ink on white paper. A designer might take from them the precise, technical look of early aeronautical drawings, with their grid structure and sweeping curves.
