A Complete Tank Test of the Hull of the Sikorsky S-40 Flying Boat - American Clipper Class
A 1934 NACA technical note from the NASA Technical Reports Server, presenting a complete tank test of the Sikorsky S-40 flying boat hull for engineers and aircraft designers. The pictures are engineering plots of resistance, trimming moment, and trim angle against speed in feet per second, drawn as dense families of labelled curves on grid paper, with a plain, technical look a designer could borrow for diagram layouts.
