The second model was built with a clock mechanism as the engine for the propeller. The explosives were in the stern and were ignited through a pistol-like control, which in turn was activated through the bow, the sides or the mast. It had two rudders: one turned to the right, the other to the left, that were moved by ropes/wires from land. After numerous experiments, this design, marked '6 m', finally performed but not well enough. He nicknamed it 'Salvacoste', Italian for "Coastsaver".