A machine to convert gravity to mechanical energy # 2

[hansvonlieven]

I am not taking about density, though there is some increased density in water at extreme depth, I am talking about the weight of the water column. There is a difference.

Water density increases very little with depth since water is almost incompressible. It does increase in PRESSURE with depth, and THAT is what you have to overcome

Hans von Lieven

[mondrasek]

Brian,

You plan to build momentum in the weight by having the weight *and* cylinder fall together.  When the cylinder is abruptly stopped, the weight should continue to move downward, extending the bottom telescoping cylinder through your clever cable and pulley system.  The extended cylinder will then lock in place via a latch.  The entire internals of the cylinder will be open to the surface atmosphere during the expansion process through a vent tube that is also coupled at the time the cylinder is stopped.

About right?

The internal pressure of your cylinder will never exceed that of the surface atmosphere on the way down and during the expansion process.  That pressure is 14.7psi.  However, at evey depth in water the pressure is greater than 14.7 psi, and doubles every ~33 feet. 

As I have tried to get you to understand, the bottom surface of any, any, any, cylinder that displaces 64 lbs of water will have an equal and identical 64 lb force pushing up on it, aginst any expansion, just as the top surface of the cylinder is at the surface of the water.  It will increase to very significant forces very quickly as it decends.  You'll remember Hans mentioning values in tons?

You have only 64 lbs of force, plus any momentum you gain while dropping due to what?  A few lbs of bouyancy difference?  Have you ever watched how slowly things fall in water?

Some day, if you swim, try taking a small air inflated ball down under water.  Watch how quickly it collapses under the pressure.  This is the same reason your ears pop.

M.

[hansvonlieven]

@ Mondrasek

You said: The internal pressure of your cylinder will never exceed that of the surface atmosphere on the way down and during the expansion process.  That pressure is 14.7psi.  However, at every depth in water the pressure is greater than 14.7 psi, and doubles every ~33 feet.

This is not correct.

Pressure doubles with doubled distance.

At 10 cm depth the pressure is 10 grammes per centimeter squared, at 20 cm depth it is twice that and so forth.

The pressure is equal to the weight of the water column above. As the weight doubles, so does the pressure.

Hans von Lieven

[brian334]

So is it your position that a falling 64 lb weight can not expand a tank that is submerse 10 ft.? Not even a little bit?
Not even 1 cb. in.

[brian334]

This is getting silly.