Improvement of aileron effectiveness by the prevention of air leakage through the hinge gap as determined in flight
This is a 1938 NACA technical report from the NASA Technical Reports Server, written for aeronautical engineers, on flight tests of aileron effectiveness with the hinge gap sealed or open. Its pictures are plain graph and chart plots of roll rate and aileron deflection against air speed in feet per second, with data points, fitted lines and labelled legends in black ink on white grid paper, which a designer could use as a sober scientific chart style with clean axes, dotted and solid trend lines, and tabular legend boxes.
