Mark 10 torpedo

The Mark 10 torpedo was a torpedo first put into use by the United States in 1915 and used as the primary torpedo in the R-class and S-class submarines. It used alcohol-water steam propulsion. It was succeeded by the problematic Mark 14 torpedo, but remained in service in S-boats & fleet submarines through the Pacific War. The Mark 10 featured the largest payload of any torpedo developed at that time.