A New Spinning-test Method
A New Spinning-test Method is a 1938 aeronautical technical report issued through the NASA Technical Reports Server, setting out experimental measurements for aircraft spin testing. Its pictures are plain line graphs of angles, speeds and moments plotted against distance, with one black-and-white photograph of a rotating model mounted in a wind-tunnel setup; a designer might take from them the clean graph styling of scientific plots, with dotted data points, labelled curves and grid axes.
