X-Plane 10.30+ Savoia S.21 Porco Rosso. The Savoia S21 is a fictional seaplane fighter that appears in the anime film Porco Rosso, directed by Hayao Miyazaki. While the plane depicted in the film never existed, Savoia was an actual Italian aircraft maker which produced a considerable number of flying boats in the 1920s, during which the film is set. The S.21 was a custom-built fighter seaplane with a single parasol wing, above which was mounted a single engine nacelle. It had a flying-boat hull and outrigger floats, and carried two machine guns in the nose. Includes highly detailed interior and exterior. This is an update of an earlier version SAVOIAS21.ZIP. By Denis Krupin.