Gravity Mill - any comments to this idea?

[tbird]

right!  the box is static.  2 bar outside, 2 bar inside.  it will not expand.

i suggest you take a survey to see which pressure (gage or absolute) our friends would like to use.

bed time.  see ya tomorrow.

tbird

[hartiberlin]

At sealevel we have 1 bar=14,5 psi pressure. That is right. These are the accepted values.
Your tire measuring gauge is subtracting this 1 bar from its reading ! So if you put 2 bar=29 psi into your tire as displayed on the gauge, it really has already 3 bar inside it !

As we have one bar more pressure 10 meters deep than at sealevel, it is okay, that we add just this one bar  at the top to our shuttle. Then it can expand in 10 meters deepth to double its size.

[prajna]

Aah, I think it dawns on me now.  2 bar inside and 2 bar outside means no air will come out at 10m depth so I have to put 4 litres of air into the box if I want to have 2 litres of air inside it (at 2 bar) and 2 litres outside it (also at 2 bar) displacing 1 litre of water.  Ok, I will check the calculator tomorrow and see if I have accounted for pressures correctly.  Thanks tbird.  Sleep well.

[hartiberlin]

Today I did lots of drawings to see and calculate, if it is possible to shift the center of gravity for the whole water case over a symmetrical axis, so that it could tilt and turn by 180 degrees.....but I have found so far no solution. The maximum was, that it just turns once by 180 degrees, but then the center of gravity is even deeper down and it can not shift anymore the center of gravity over its axis for the next turn...too bad...

[hartiberlin]

Pranja, Tbird is right, we need at 10 meters down 4 bar absolutely to expand the shuttle twice ! At sealevel we would just need 2 bar, but down at 10 meter we need twice as much !