The drag of inflatable rubber de-icers
A 1938 NACA technical note on aircraft de-icing, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers. Its single figure is a plate of airfoil cross-section profiles of model rubber de-icers, drawn as curves with scale bars and dimension callouts. A designer might take from it the clean engineering-diagram style of labelled technical line drawings with lettered sub-captions.
