Aircraft "Weighing"?

Date:         05 Jun 99 02:09:36 
From:         "Martin Chiew" <martinchiew@one.net.au>
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Hi all,

Just a thought, why don't aircraft manufacturers design utilise the landing
gear, or tyres in the landing gear to find out the aircraft weight as
opposed to working out rough passenger weights, and fuel, etc?

Wouldn't it be more accurate for the plane to weigh itself, and then you
could use the rough (is it 200lb p/pax) passenger weights for redundancy?
Or is it too inaccurate to do so?

By doing so (I don't know how they would do it, air pressure in the tyres,
something in the landing gear struts?) you could get the aircraft's sprung
weight (the unsprung weight is highly unlikely to change!).

Cheers,

Justin