Franco Tosi (see), from Legnano, near Milan, built engines and various machinery, including large naval engines.

-He began in aviation by building Issotta Fraschini IF engines, V4-B models.

-He later made his own engines, such as the V-12 shown below, with 400 hp, which would reach 440 hp at 1,600 rpm and 500 hp at 1,700 rpm.

“Tosi V-12”

From Appendix 9: The armaments, ammunition, shipyard, and engine factory made the 500 hp V-12 shown in the main text.

-The one made under license from the Isotta Fraschini V4B is also mentioned. An illustration of this engine has been located on a historical page.

“Tosi V4B, IF license”

We'd like to take this opportunity to add a photo of the Tosi test room.

“Tosi engine test hall”

And also the assembly workshop, which appears in the same historical report.

“Tosi aircraft engine assembly room"