Theoretical Study of Various Airplane Motions After Initial Disturbance
This is a 1938 NACA technical memorandum, a government aeronautical research report issued by the National Advisory Committee for Aeronautics for engineers and aircraft designers, studying how airplanes move after an initial disturbance. The single page shows a grid of line graphs plotting response curves against time for horizontal and vertical gusts, drawn in fine black lines on white paper with small axis labels. A designer might take from it the spare, precise chart style of mid-century engineering documents, with plotted curves and labelled axes in a restrained monochrome layout.
