Hydrodynamic and Aerodynamic Tests of Models of Flying-boat Hulls Designed Flow Aerodynamic Drag - NACA Models 74, 74-A, and 75
This NACA Technical Note from 1938, issued by the United States National Advisory Committee for Aeronautics for aeronautical engineers, reports hydrodynamic and aerodynamic tests of flying-boat hull models 74, 74-A and 75. The three pictures are spray photographs of models in free-to-trim motion, with rows of side views beside rear views of water thrown off the hulls, and a designer could draw on the sharp wedge-shaped spray sheets and the layered, streaked white plumes as a study of splash and motion.
