Full-scale Force and Pressure-distribution Tests on a Tapered U.S.A. 45 Airfoil
This is a 1935 NACA technical report from NASA's Technical Reports Server on full-scale force and pressure-distribution tests of a tapered airfoil, written for aeronautical engineers and researchers. Its pictures are plain line graphs of lift, drag, pressure, and centre-of-pressure curves plotted against angle of attack and lift coefficient, with dense gridded axes and labelled curve families. A designer could take from them the restrained chart conventions of mid-century engineering publications, with clear legends, tick-marked grids, and sparse two-tone linework.
