Flight Tests on the Lateral Control of an Airplane having a Split Flap which Retracts Ahead of Conventional Ailerons, Special Report
A 1933 NACA special report on flight tests of lateral control, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers. The pictures are line drawings of a split flap wing with cross-section and plan views, a graph of rolling, yawing and hinge moment coefficients against aileron deflection, and a photograph of a P-22 airplane fitted with the special wing. A designer might take from them the clean technical diagram style of labelled wing profiles and plotted curves.
