Landing characteristics of an autogiro
A 1934 National Advisory Committee for Aeronautics technical report, issued by NASA's Technical Reports Server, on the landing behaviour of an autogiro, a rotary-wing aircraft. The first picture is a line graph of speed and approach-path data with solid and dashed curves and plotted symbols, and the second is a rotated scan of the report's cover page with its title block and technical note number. A designer might take from the graph a clean technical chart style of labelled axes, dashed versus solid line coding, and plus and circle markers for data points.
