Characteristics of two sharp-nosed airfoils having reduced spinning tendencies
A 1932 NASA technical report on wind-tunnel tests of two sharp-nosed airfoil sections chosen to reduce spinning tendencies in aircraft, issued for aeronautical engineers and researchers. Its pictures are dense technical graphs and tables plotting lift, drag, pressure centre, moment and angle of attack against lift coefficient, with thin black curves, dotted markers and small gridded axes that a designer might borrow as minimal data-visualisation or engineering-diagram references.
