The Effect of Spray Strips on a Model of the P3M-1 Flying Boat Hull
This is a 1933 NACA Technical Note on the hydrodynamic testing of a scale model of the P3M-1 flying boat hull, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers. The pictures are engineering drawings with dimensioned hull and float profiles, a grey halftone photograph of model hull sections, and a plotted graph of resistance, trim and trimming moment against speed. A designer might take from them the restrained technical look of 1930s aviation documentation: dense dimension lines, serif labels, and line-plotted curves.
