A hole in a submarine at depth would produce a jet of water that would be difficult to stop. No, boat weight has no effect other than often causing the hull to sit lower in the water (buoyancy requires the mass of water displaced by the submerged hull to be equal to the displacement of the boat). OR simply seal the end of a long pipe and push it vertically into the water to the depth being tested and see if any water gets into the pipe Cheers Mark (physicist) If the sealant holds the dowell and mass up for the rest of the day it will probably stop a leak at a depth of 6' in the ocean. To do this, drill a 1" area hole in a sheet of ply, hold the sheet horizontally on the surface of a water bath, seal the hole with the goo being tested and then put a dowel into the hole about the same area as the hole with a few pounds of mass on it. You could test any sealant (assuming it only has to hold leaks to a depth of 6 feet) by seeing if it will hold on when a few pounds per square inch pressure is applied to it. If the hole is 6 feet below the water line and the hole has an area of one square inch it will take a force equivalent to the weight of 2.7 pounds to stop water flowing into the hull. The squirt you will get into the boat therefore just depends on how deep the hole is in the hull. The water at a depth of 6 feet is 2.7 pounds per square inch ( in the old measurements) and half this at a depth of 3 feet. Water pressure = density of water x depth x acceleration due to gravity Hence, water pressure is a function of depth only.
#Stay afloat emergency leak sealant trial
At $13 or so for a small tub I can afford to trial it, probably use my engine water inlet, before I rely on it.
I think the problem with Stay Afloat is more likely to be when the hole is small, say a 0.5 cm dia, and the pressure through the hole is like a jet of water, or a two inch choke where it just won't have the strength to hold in such a big hole.
#Stay afloat emergency leak sealant cracked
The flow they had from the split hose is similar to what I got from my stern tube when it cracked recently, though with a smaller hole and therefore at higher pressure. When I take the blank out to put the log in the flow is more than in the video but probably still manageable with this product. My boat weights about 6.5 tonnes and my log is about 1.25" dia. I imagine your fishing boat would have been maybe 10 or more tonnes therefore the different flows.
They were using a pretty light boat, probably a small half cabin type. The volume/pressure of water coming in is related to boat weight and hole size. Ramona, I agree partly with your skepticism but I think you are being too critical.
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