Delta fuel / delta payload

Date:         05 Oct 98 00:26:48 
From:         Thomas Buro <buro@gmx.net>
Organization: University of Wuppertal
Followups:    1 2 3
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I am searching for the sensivity data of fuel burn to payload for
aircraft. How much fuel (kg) is burned more, when one kg of payload is
added to the aircraft. E.g. for a range of 1000 km, 5000 km and 10.000
km. Has anyone this data for actual aircraft types.

Regards Thomas Buro
buro@gmx.net