Contribution to the aileron theory
A 1929 technical report from the NASA Technical Reports Server, a scientific paper on aileron theory for aircraft wings, written for aeronautical engineers and researchers. Its single figure, Fig. 1, is a line diagram of a cross-section with labelled dimensions, a centre line, and dashed reference lines marking radii and widths, giving a designer a clean example of schematic engineering linework and labelled annotation.
