Present Status of Lateral-Control Devices for use with Split Flaps, Special Report
A 1933 NASA technical report on lateral-control devices, such as ailerons and split flaps, used on aircraft wings, written for aeronautical engineers and researchers. Its pictures are plain line drawings of isolated wing sections in perspective, with labelled control surfaces shown raised, neutral or deflected, which a designer could use as clear diagrams of wing-surface movement.
