PPRuNe Forums - View Single Post - Did a BA B747 dump 50t of fuel due to a miscalculation?
Old 11th Aug 2007, 13:03
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old,not bold
 
Join Date: Apr 2006
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Exactly....and I'd still be interested to know where they went to jettison 50 Tonnes of Jet A1.

Surely it wasn't done on route? Or was it? How long does it take? Or to put it another way, how many miles are covered during the process?

What FL was it done at? If on route, that would have been quite low, wouldn't it, unless a special climb for the purpose was carried out.

So many questions, so little time. Does anyone know some or all the answers?
I don't, obviously. This is outside my experience/knowledge.



PS If, say, it takes 15 mins to lose 50,000 Kgs, my guesswork says that means 500-600 Kgs per mile, if flying a straight line during the whole process. Would that be in the ball-park? Or miles away? Presumably the fuel forms a mist as it emerges into the slipstream/vortex, in non-scientific terms. Then what? I would imagine that 500Kgs per mile/313gm per metre (if that's anywhere near the right figure) is negligible at ground level, especially after dispersal by winds, but what are the facts?

Last edited by old,not bold; 11th Aug 2007 at 13:31.
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