Re: tire gas ....

Date:         03 Oct 99 17:38:30 
From:         James Matthew Weber <jmweber@goodnet.com>
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At 04:42 PM 9/16/99 +0000, you wrote:
>can someone tell me why aircraft tires are filled with nitrogen, instead
>of air ?

Many are air inflated. The advantage of Dry  Nitrogen is that it will
not oxidize the rubber compounds or anything else inside the tire. CO2
would work, except that at cruise altitudes. the temperature of -45C and
tire pressure would liquify it. Dry Air is almost as good as Nitrogen.
You want the filler to be dry to avoid corrosion problems on the rims
and valves as well.

Contrary to other comments, Nitrogen offers no real weight advantage
(The difference in weight between an air filled tire and a Nitrogen
filled tire is literally a few grams!

James Matthew Weber   (623) 587 7514 .  Fax  (623) 434 7598