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. Operators Finnish Air Force Corpo Aeronautico Militare Regia Aeronautica Specifications (S.9) References Further reading S.09 1920s Italian military reconnaissance aircraft Biplanes Flying boats Single-engined pusher aircraft Aircraft first flown in 1918