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Posted by Frank on June 25, 2007, 4:55 pm
On Jun 25, 4:19 pm, "Chuck (in SC)" <> wrote:
> wrote:
>
>
>
>
> >> The guy who sold me my monster oxygen free speaker cables with the
> >> gold ends said you should only use argon in your tires ;-)
>
> >I know you said it in jest, but a lot of people are being sold on nitrogen
> >in their tires. Stations are getting $5 a tire. They use nitrogen in race
> >cars and aircraft where it has some benefits, so naturally, someone came up
> >with the idea of selling it to the gullible public as a real value. .
>
> I'm a airline pilot and I used to fly for a race team..
> The only advantages to nitrogen is no Oxy present, dry (easy to have
> dry air too.. ) THE reason it's used is compressed cylinder of
> Nitrogen, when regulated down to usable pressures, goes a LOOOOONG
> way. If you're in pit road,, and using air tools, no compressor is
> needed. In Lear jets, a volleyball size/shaped tank at 1700 lbs is
> used to "blow" the gear down in an emergency and for emergency
> braking.
> If the same cubic ft of dry air could be stored in the same size
> tank.. that would be used.
> Also.. if you're going to pressurize something that has to be
> pressurized higher than air compressor system will go safely, you grab
> the nitrogen tank...
> Chuck
Both O2 and N2 are near enough perfect gases and you can compress the
same volume. The oxygen would weigh slightly more for the same volume
because of higher molecular weight. Oxygen under high pressure does
present flammability problems in that it should not contact organic
materials when under high pressure. Nitrogen should also be kinder to
rubber since oxidation is the major degradation pathway.
Frank
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