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Any thoughts onhow to make this boat better
Dave Doe wrote:
a) What is the *point* of your experiement? - other than to only prove my argument correct. Dave, since your argument is not correct, it would be pretty hard to prove. Are you saying that the water ballast inside a boat hull does not affect it's stability? That the water ballast "weighs nothing" until it is above the waterline? If that were true, the boat's waterline would be the same when the ballast tank was empty as when it is full. Does the boat's displacement increase when the ballast tank is filled? If so, then the the water ballast "weighs" something, regardless of where it is relative to the waterline. If the unit conter of gravity is below what the boat's Center of Gravity would be without the ballast, then it increases the boat's stability, regardless of whether the tank is above or below the waterline. b) try this (your experiment pretty much, say 4) ... So 3/4 full. Hold the bottle at the top and note the weight. Slowly lower it into the water. Note the weight changing! ??? How can it be getting lighter all by itself? Try this experiment. Float an empty bottle. Mark where the waterline is. Now fill it however full you want, 1/4 or 3/4 or whatever. Does the bottle sink any deeper into the water? No? Then it "weighs" more, the water inside the bottle must be weighing it down. PS: experiment not conducted, just using simple physics. Feel free to do it and get back to me if I'm wrong. Yep, it's just simple physics. But a number of people have tried to proclaim that water ballast can't possibly work because "water doesn't weigh anything in water." But it obviously *does* work, and the physics (when considered correctly) show why. Fresh Breezes- Doug King |
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