[Space] test filling the test balloon

[deleted]

Bear in mind that filling a gas that's positively buoyant is going to be
significantly different logistically than filling a negative or neutral gas.
 The only reason I can think of to practice with a neutral gas would be if
you're trying to devise an airtight filler seal.  Make sure your whole
filling rig can withstand like 20lbs of upward vertical force.

On Wed, Jan 13, 2010 at 2:14 PM, Christie Dudley <longobord at gmail.com>wrote:

> I think nitrogen might be better for the balloon due to it's inertness and
> it shouldn't be significantly different from CO2 in price, but I may be
> wrong.  Praxair, I've heard, is a bit cheaper than airgas.  I vaguely recall
> hearing about the FLG discount that could be had, too.  I can look into
> that.
>
> Christie
>
> On Jan 13, 2010 1:59 PM, "Jonathan Moore" <moore at eds.org> wrote:
>
> I would guess airgas. I have bought CO2 there for a reasonable price.
>
> On Wed, Jan 13, 2010 at 1:29 PM, Mikolaj Habryn <dichro at rcpt.to> wrote: >
> Apparently filling balloo...
>
>
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