The SIAI Savoia S.9 was an Italian reconnaissance flying boat, manufactured by Societa Idrovolanti Alta Italia (S.I.A.I.)

from 1918.

The wing structure was unusual by being a single-bay biplane wing, with additional struts mounted mid-bay at the junction of the flying and landing wires, so that it appeared to have a two-bay wing.

The S.9 was also licence-built in France by CAMS (Chantiers Aéro-Maritimes de la Seine) as the CAMS C.9.

Data from [1]General characteristics Performance Armament