Wind-tunnel investigation of rectangular and tapered NACA 23012 wings with plain ailerons and full-span split flaps
This is a 1938 NACA technical report from the NASA Technical Reports Server, presenting wind-tunnel test results for rectangular and tapered NACA 23012 wings fitted with plain ailerons and full-span split flaps. Its pictures are dense engineering graphs of rolling-moment, yawing-moment and hinge-moment coefficients plotted against aileron deflection, plus lift and drag curves against angle of attack, drawn in black line on gridded white paper with tabulated legends. A designer could take from them only the visual language of technical charts: fine grids, stepped curve families, small legend boxes and sans-serif axis labels.
