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CHK BOONE wrote:
> 
> **There is no pressure from the water.   The gas in the bladder is at ambient
> pressure plus whatever is exerted by the bands.    With wings that have no
> bands the air is simply held in a plastic bag that has no elasticity and the
> only pressure exerted is that of buoyancy of the contained bubble upward.
> This buoyancy is what forces the air out when you dump gas so that if you try
> to do so while upside down so that the dump valve is at the bottom of the
> bladder you will actually probably let water in rather than air out.
>    With the bondage wings the pressure on the contained gas will force it out
> the lowest point just as if you were squeezing a grocery bag of air.   So you
> can pull the dump valve on both the top and bottom and dump gas from both
> simultaneously if desired, or just the top, or just the bottom, or the power
> inflator without having to hold it higher than the bubble of contained gas.
> (you will probably get a tiny bit of water coming in in some cases but nothing
> worth mentioning)
> You are absolutely correct about this. I was picturing and describing, 
using the term 'preasure' incorrectly, an upright diver using a high 
dump valve. Obviously in this scenario, the bouyancy of the gas has more 
to do with rate of the dump than the bungees. 

Tom
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