Annual report - National Advisory Committee for Aeronautics
An annual report issued in 1915 by the United States National Advisory Committee for Aeronautics, a government body, for engineers and officials tracking aviation research. Its pages carry technical plates: carburetor flow charts, a propeller-style profile graph, and a wing or airfoil outline drawing. A designer might borrow its plain engineering grids, tabular curves, and precise line-drawn diagrams for a vintage technical look.




