One tank of nitrogen is a whole lot of volume when released to atmospheric
pressure. And it is cheap.
Compressed air would take a bunch of piping, etc., or a compressor at each
pit.
The Indianapolis motor speedway uses tanks of nitrogen supplied by a local
welding supply company (most likely for "advertising" and at little or no
cost to the speedway)
They even run air tools (impacts) with nitrogen too (or used too, they may
use cordless electric now if you believe the Milwaukee commercials)
Personally I think it is more about economics and "ease of use" methods at
the IMS over anything else.
-Bill
-----Original Message-----
Well, I'll let the expert chime in later, but as I recall Boyle's Gas Law
(Hope it was Boyle anyway) says pressure and temp and volume are related. I
don't think the make up of the gas has any thing to do with volume (unless
it is related to Avragado's number, which is).
Like I said, Leave to the experts, but I do not think that use of 100%
N2 over common air is in anyway related to temp. Gotta be another reason
they use it.
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