Hulls for Large Seaplanes
A 1925 NACA technical memorandum on hulls for large seaplanes, issued by the National Advisory Committee for Aeronautics for aircraft engineers and designers. Its page of numbered line drawings shows hull cross-sections and profile views, labelled Figs. 1 to 10, with lettered reference points and dashed centre lines. A designer might take from it the plain technical diagram style, with its clean outlines, lettering and figure numbering, as a model for schematic drawings.
