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  1. imjasper

    speed of object through water

    Not busting it at all. Thanks for the info. I had considered the temp. factor but have been making my equations dependent on a constant temp. Your input made me start to think about some other factors that I really need to consider though. Thank you for your input, it did help.
  2. imjasper

    speed of object through water

    David, Your posts have been most helpful and are appreciated.
  3. imjasper

    speed of object through water

    This does help me. However, the problem I was having is that as I said above, the object holding the air is capable of holding 8 cubic feet of air but only 1 cubic foot is initially pumped in. This means that as the object ascends, the volume of air will increase thereby increasing the...
  4. imjasper

    speed of object through water

    How would I calculate the rate of ascent of an object traveling up through water using bouyancy as the propellant? Example: an open bottomed,8 cubic foot object at 197 ft deep with 1 cubic foot of air. I know that the weight and shape of the object will affect it's rate of ascent. I also know...
  5. imjasper

    formula for pressure to volume

    Thank you very much, your help is greatly appreciated.
  6. imjasper

    formula for pressure to volume

    I'm trying to find a formula that will determine what the volume of air is at varying pressures. example: 1 cubic ft. of air at 100 psi What would the volume be at 75 psi at 50 psi etc. Is there a formula that would make it easier to determine this??
  7. imjasper

    Can fluid pressure be overcome

    The best way I can put this is as follows: A ten cubic foot open bottom barrel full of water at the bottom of a 230' sillo full of water. An air compressor at the base of the silo to fill the 3 cubic foot barrel. The air comp. will pump 3 cubic ft of air per minute at 100 psi (per manufacturer...
  8. imjasper

    Can fluid pressure be overcome

    I'm experimenting with a few theories of mine. No I'm not an engineer but I have this problem with ideas and numbersin that when I get an idea in my head, and being as good with numbers as I think I am, I can't sleep at all until I get the idea either solved or eliminated as being plausible...
  9. imjasper

    Pump up equation?

    Thank you very much. That answers my question completely. I even went so far as to contact a few air pump manufacturers and was told by the chief engineer (which I highly doubt) that all it would do is aeriate the water........LOL. Again, thank you very much.
  10. imjasper

    Can fluid pressure be overcome

    Thank you, very helpful.
  11. imjasper

    Can fluid pressure be overcome

    I forgot to mention the fact that there would be a one way valve at the top of the tank of water to stop the build up of pressure inside the tank.
  12. imjasper

    Can fluid pressure be overcome

    If I have a tank of water 230 feet deep, and I have an open bottom barrel at the bottom that I want to fill with air, and I am pumping the air directly from the outside of the tank at the bottom (direct source of air so that I don't have to have 230' of hose to get to the bottom), I know that I...
  13. imjasper

    Pump up equation?

    I am trying to determine how long it would take to pump air into an open bottomed barrel(100 cubic feet) in a tank of water 230 feet deep. (Say a silo) I know that the psi at that depth is approx 100 psi. The pump will be located below the tank so there will be minimal amount of hose needed. I...
  14. imjasper

    PSI needed at 136 ft. underwater to push water out.

    I'm sorry, I mispoke myself, I meant approx 230 feet. The water would be held in a silo and the air would be being pumped from the bottom so that the air hose would actually be pumped through a hose only a few feet long. And the silo will be air tight with a pressure relief valve at the top. I...
  15. imjasper

    PSI needed at 136 ft. underwater to push water out.

    I know that at 136 ft underwater, there is approx 100psi on an object. If it were a barrel with an open bottom, and I were pumping air into the barrel to push the water out, would I need 100 psi to do this? Or would the fact that the water would be escaping out the bottom reduce this? In other...

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