Checking weight and balance

Date:         03 Dec 99 02:10:08 
From:         kts@socrates.berkeley.edu (Katie Schwarz)
Organization: University of California at Berkeley
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Are the weight and center of gravity of an airliner calculated solely
from what's supposed to be on board and how much it's supposed to
weigh, for example, counting the passengers and multiplying by a
standard weight?  Is there any means of sensing the weight directly?

Since the "Gimli Glider" took off with the wrong weight of fuel, its
weight (of the whole plane, that is) must not have been measured
directly.

--
Katie Schwarz
"There's no need to look for a Chimera, or a cat with three legs."
                         -- Jorge Luis Borges, "Death and the Compass"