This is just a curiosity question...
I see many photos of Browning's M1917 water-cooled .30-cal machine gun with an external water can connected to the barrel tank with a hose. But how did the water flow? There was no pump that I know of to pump more water into the barrel tank as the water dissipated... What was the purpose of the hose, to drain hot water? Then what, how do you add more cool water? Very confused as to the function of the hose and the water can.
I see many photos of Browning's M1917 water-cooled .30-cal machine gun with an external water can connected to the barrel tank with a hose. But how did the water flow? There was no pump that I know of to pump more water into the barrel tank as the water dissipated... What was the purpose of the hose, to drain hot water? Then what, how do you add more cool water? Very confused as to the function of the hose and the water can.