From Boeing Data for B777-200ER.
Long Range Cruise. Engines RR Trent 892
All up Weight at start of distance, 200.0 Tonnes
Time in hours and minutes, fuel burn in 1,000s kg
Distance -------------- Flight levels
(nm)_______100__________200___________300____________400
_________Fuel Time______Fuel Time_______Fuel Time________Fuel Time
_600_____11.5 1.50_______9.1 1.37________7.5 1.28_________6.6 1.22
1200_____23.3 3.18______18.8 3.12_______15.6 2.52________13.9 2.38
2000_____38.5 6.08______31.2 5.21_______26.4 4.45________23.5 4.19
Nice table it's a little weird when you look at your kgs/hr check. Take for example the FL100 column.
600nm. 11.5 Tonnes in 1:50 equals 6.38 Tonnes/hour
1200nm. 23.3 Tonnes in 3:18 equals 7.06 Tonnes/hour
2000nm. 38.5 Tonnes in. 6:08 equals 6.31 Tonnes/ hour
Surely it would burn more in the first 600nm?
Is there any tail trim tank fuel with 38.5 Tonnes left?