Did67 wrote:If you fill 100% of water, not elastic, the pressure will be at zero as soon as the first liter is withdrawn ... [in this case, moreover, filling is not simple - decompression valve?]
If you fill like a pressure regulating balloon, upside down, in fact, you compress the air which then serves as "pressurization" ... Yes, there you are right ... But the capacity will be reduced ... Must leave at least 1/3 of pressurized air ...
Obviously but when he talks about a pressure balloon I imagine it is a pressure regulation balloon, like on a suppressor with membrane and compressible air! Hence my first remark at the top ...
There is no point in pressurizing a standard balloon ...
Then I don't know the details at the respective air / water volume level. 30% you say? Okay.