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Old 24 January 2013, 04:31   #11
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I don't see it would be a problem to keep helium from escaping from your tubes. Surely the relevant "bladder" inserted into the tube could solve the problem. However, do agree that it's a waste of time and money. If you look at the helium balloons they sell in shops you'll see that even a fairly big one can be weighed down with something as small as a 2p piece, so I reckon a couple of tubes full probably wouldn't even give you 2-3kg. I think this discussion is just a lot of hot air............ah, hot air, there's an idea?
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Old 24 January 2013, 05:28   #12
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I recommend simply having an enormous turd just before leaving the dock, that'll save you more weight.
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Old 24 January 2013, 06:00   #13
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I recommend simply having an enormous turd just before leaving the dock, that'll save you more weight.
If most on here did that this forum would float up into the sky
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Old 24 January 2013, 07:14   #14
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Me old man said that they put helium in some of the b 29 super fortresses tyres as a weight reduction on some of the fuel critical long distance flights but they would go flat in a week or so if not topped up ,

rough guide ,,,,a 15 cubic foot volume (not compressed )balloon of pure Helium would lift or give neutral bouyancy in air at sea level of about a pound in weight .

In the future there has been talk by the producers that there may be a world shortage of helium gas so the price will go up even more just about outstripping it for certain uses . (Not a pun .
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Old 24 January 2013, 09:25   #15
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Me old man said that they put helium in some of the b 29 super fortresses tyres as a weight reduction on some of the fuel critical long distance flights but they would go flat in a week or so if not topped up ,

rough guide ,,,,a 15 cubic foot volume (not compressed )balloon of pure Helium would lift or give neutral bouyancy in air at sea level of about a pound in weight .

In the future there has been talk by the producers that there may be a world shortage of helium gas so the price will go up even more just about outstripping it for certain uses . (Not a pun .
My late dad used to have a family business running one of these a few years ago, obviously he switched to helium because most of his punters smoked in those days.

http://www.rajankhanna.com/wp-conten...phy-poster.jpg
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Old 24 January 2013, 10:12   #16
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I wouldn't bother. Helium will diffuse through the tube material and is from 3-5 ppl so it becomes an expensive 3kg saving.
And if the local kids find out they will be breathing from the valves to talk like Donald Duck!!
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