747 fuel table QANTAS VIRTUAL AIRWAYS 

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B747-400  a Fuel Flow Table
 

Warning: For PC simulator use only ! Do not use for real world flight planning.


This simplified table shows the connection betwen weight and optimum altitude, as well as the corresponding fuel flow values per engine, true air speed (TAS) and the rpms of the low pressure compressor stage (N1). International standard atmosphere (ISA) conditions are assumed, as well as Mach 0.86 cruising speed and all three air conditioning packs are on. Fuel flow figures have been rounded.
 
 

Weight (1000kg) Optim. altitude Fuel flow (kg/h)/eng TAS (kts) N1 (%)
390 FL290 3400 509 94.1
360 FL310 3100 505 93.6
330 FL330 2800 500 92.5
300 FL350 2500 496 92.0
270 FL370 2300 493 91.6
240 FL390 2100 493 91.2
220 FL410 1900 493 91.5
200 FL430 1800 493 91.7

N1 is higher at higher than ISA temperatures - fuel flow and TAS as well ...

Source of data: Manual for Precision Simulator 1.3 by Aerowinx and Hardy Heinlin, original table compiled by Marc Brodbeck.
I've rounded the fuel figures and the full table in the PS1.3 manual is a lot more comprehensive.