This series is comprised primarily of National Advisory Committe for Aeronautics (NACA) technical notes and test reports, many of which contain blueprints and/or photographs. The series includes photographs depicting various flap installations, as well as newspaper clippings and correspondence, such as correspondence with NASA Ames Research Center concerning scheduled tests of Ames Fowler Model propellers. Items of note include photographs of boundary layer control gloves, and a letter from The Smithsonian Institution National Air Museum with a photograph of a Fowler airplane model on display at the museum.