Please Register or Log in to view the hidden image! Here is the original drawing from the patent. The loop isn't included cause I hadn't thought of it yet as apart of the water cannon. The shape of the water cannon in this drawing would be similar to that of a mixing bowl. This shape may be around 6% efficient to the blast energy. You would fill the cavity about one third of the way. The explosion pushes water out horizontally over the sides opposed to vertically high up in the air using the soup can method. I prefer the long narrow water cannon method as opposed to the bowl shaped method because the efficiency is higher and the system can be enclosed easier.