Sergio Stefanutti (1906–1992) was an Italian engineer who specialized in the design of aircraft.
He joined aircraft manufacturer Società Aeronautica Italiana (later renamed SAI Ambrosini following a takeover) in the 1920s.
This aircraft is visible in the Italian Air Force Museum near Bracciano (Rome); together with the following development that it also foresaw the use of a rocket besides the turbojet to increase the push and the speed of interception.
Ciampaglia, Giuseppe: "Dal SAI Ambrosini Sagittario all'Aerfer Leone.
Storia dei primi caccia supersonici italiani realizzati da Sergio Stefanutti".