Wind-Tunnel Research Comparing Lateral Control Devices Particularly at High Angles of Attack XIII : Auxiliary Airfoils Used as External Ailerons
A 1936 NASA technical report on wind-tunnel tests of lateral control devices, specifically auxiliary airfoils used as external ailerons at high angles of attack. The pictures are contour charts plotting measured values across a plain wing section, with a small aileron-mounted airfoil drawn near the leading edge and numbered coefficient curves; a designer could take from them the dense, labelled flow-field diagram style for technical data visualisation.
