Tank tests of two models of flying-boat hulls to determine the effect of ventilating the step
This is a 1937 NACA-style technical report from the NASA Technical Reports Server, presenting tank test results on flying-boat hull models to show how ventilating the step affects resistance. The pictures are engineering line drawings of hull plan, side and section views with dashed flow arrows and air scoop details, plus graphs of resistance and trim coefficients against load and speed, offering a designer schematic diagrams of water flow and hull cross-sections in a precise, monochrome technical style.
