Comparative Performance Obtained with XF7C-1 Airplane Using Several Different Engine Cowlings
This is a 1930 NACA technical report, issued by the National Advisory Committee for Aeronautics, on flight tests of the Curtiss XF7C-1 fighter comparing several engine cowling designs for drag and performance. Its photographs document exhaust collector ring cowlings and cockpit views for engineers and historians of aviation. A designer might take from them the radial engine's ring-and-spoke geometry, the bold blade silhouettes of the propellers, and the stark grey photographic tonality typical of technical documentation of the period.
