The controls at low hinge moments
A 1932 NACA technical memorandum, published by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers, presenting aerodynamic test data on aircraft control surfaces. The pages are numbered figures of graphs plotting coefficients against angle of attack and control deflection, with small airfoil and wing section sketches. A designer might take from them the plain engineering chart style of gridded axes, labelled curves, and tabular plotting of measured results.
