Re: Weight of cabin air at altitude

From: (Rickydick)
Organization: Netcom
Date:         21 Mar 96 02:38:01 
References:   1
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In <airliners.1996.389@ohare.Chicago.COM> mezei_jf@Eisner.DECUS.ORG
(Jean-Francois Mezei) writes:
>On a popular airline web site, there is a mention that on its 747-400s,
>when at altitude, the amount of air compressed into the plane weights
>one ton.

That's just the price of comfort.  Passengers like to breathe and stay
warm.  There is also a ton of sheet lead in the sidewalls of DC-10's,
and at least the classic 747's.  There is no better noise insulator.

In case anybody wonders, it has been figured to cost $25 in fuel to
carry a pound in an airliner for a year.