Air Buoyancy Machine

[TinselKoala]

Push the tank just under the water. It raises the water level above the line, because you have displaced the water upward.
Now push the tank one tank-dimension further under the water. Does the water rise any more above the line? No. But does water rise? Yes. The volume of water equal to the volume of the tank, must rise one tank-dimension up, to replace the space previously occupied by the tank.

Now push the tank one more tank-dimension under the water. Does the water rise any more above the line? No. But does water rise? Yes. The volume of water equal to the volume of the tank, must rise one tank-dimension up, to replace the space previously occupied by the tank.

Now push the tank yet one more tank-dimension under the water. Does the water rise any more above the line? No. But does water rise? Yes. The volume of water equal to the volume of the tank, must rise one tank-dimension up, to replace the space previously occupied by the tank.

Now keep going, until you get as deep as you want. Every time you move the tank downward, an equal volume of water must move upward. Water moving in water is neutrally buoyant, true, but you are not moving this water with water. You are moving it by displacing it with an object of different buoyancy. Hence work must be input.

[brian334]

I am not pushing the tanks down, the tanks are heavier than the liquid they displaces. The tanks sink all by themselves.

[TinselKoala]

Ah, but they weigh LESS in the water than they do out of it. This difference is the Buoyancy. And it is due to the water displaced upward. The tank and its weights may be heavier than the water displaced--they have to be in order to sink. But the tank and its weights weigh less, by the weight of the water displaced, in the water than they do out of it.
How did you change the tank from being positively buoyant on the rising side, to negatively buoyant on the descending side? This cannot be done without doing work. You can't displace the water for free.

The lighter tanks rise, right? How do you think they do this? They do it because heavier water runs under them, displacing them upward. We see this as being a property of the light tank, but really it is a property of the water, which falls, to force the tank upward.
This process is reversed by the heavy sinking tanks on the way down.
Any work "done" by the rising tanks, is actually being done by the water falling into the space under the light tanks as they rise. And this work must be given back as the heavy tanks fall, raising water as they do so.

[brian334]

How did you change the tank from being positively buoyant on the rising side, to negatively buoyant on the descending side? This cannot be done without doing work. You can't displace the water for free.

Maybe you should go to my website http://bsandler.com and find out.

[brian334]

People that criticize things they don’t understand
Are people with big egos and little brains.