Tank Tests of a Model of One Hull of the Savoia S-55-X Flying Boat N.A.C.A. Model 46
This is a 1938 NACA technical report issued by the National Advisory Committee for Aeronautics, a US government research agency, describing tank tests of a model hull for the Savoia S-55-X flying boat. The page shows two photographs of the full aircraft on the water, rotated sideways on the page, with the caption 'Figs. 1, 2 Views of Savoia S-55-X Flying-boat.' A designer might take from it the twin-hull profile and the sleek white and dark-trimmed fuselage shapes of an early seaplane.
