Re: Inert Gas in Fuel Tanks

From:         cp@panix.com (Charles Platt)
Organization: PANIX Public Access Internet and UNIX, NYC
Date:         05 Nov 96 04:14:02 
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It would be helpful to know the approximate volume of fuel tanks in a
large aircraft such as a 747, in order to calculate the volume of liquid
nitrogen that would be required to fill them with vapor at an appropriate
pressure (which presumably would have to increase as the aircraft makes
its descent, in order to avoid stresses from pressure differential inside
and outside the tank).

I seem to recall the volume ratio between liquid nitrogen and nitrogen
vapor is around 1:1000 at sea level, but I have no references here to
check this.