Devices for Prevention of Stalled Flight
A 1926 NACA technical memorandum from NASA's Technical Reports Server, issued for aeronautical engineers and researchers, on devices meant to prevent stalled flight in aircraft. The first picture is a line diagram of a control linkage with a wing section and dimensions in millimetres and feet, and the second is a set of typed photo plates showing a Constantin device, cockpit indicating lights, and a vane of an S-E device on a biplane. A designer might take from them the plain technical look of early aviation documentation, with clean line drawings, dimension labels and grainy sepia photographs of aircraft parts.
