Lift, Drag, and Elevator Hinge Moments of Handley Page Control Surfaces
This is a 1928 NACA technical report, issued by the NASA Technical Reports Server collection, presenting wind-tunnel test results for Handley Page control surfaces and written for aeronautical engineers and researchers. Its pictures are plain line graphs of lift-to-drag ratio, elevator hinge moment and drag coefficient plotted against angle of attack for several elevator settings, drawn in fine black lines on squared grids with labelled curves. A designer could take from them only the sober visual language of technical charts: dense families of curves, tick-marked axes and small serif captions.
