Okay.
A320 standard tanks - 19.3 max fuel load. CFMs - tanks empty.
Given 5250 NM
Plan upload fuel to first fuel stop 1750 NM - at that APS weight plus crew/crew bags and fuel required + res/alternate + final extra.
Land, fuel to 2nd fuel stop equally about 1750 NM, land re-fuel then to destination.
Time/Dist. in the climb 20/31 mins 83 NM
Time Dist. in the descent 111 NM ---
1750 NM - minus climb and descent = 1556 @ 2180/hr. = 7374 kg
Climb 2,000 kg
Descent 600 kg
total first leg 9974 kg + res 3391 = 13,365 kg (+2,900 contingency in the tanks)
second leg kg 9974
third leg to destination 9974 kg
total fuel 13,365+9,974+9,974= 29,922
Landing with 3391 (+2900 contingency) in the tanks. . . . is one way of doing it or,
uplift to full tanks 19.3 T and go a tad further for the first and subsequent fuel stops, or en-route diversion. this being heavy on fuel for the first half of the trip and light for the next giving better kg/gnm.
Example - there was a 747 going from an airport in Southern England all the way to K.L. empty - except for 12T in the hold of 1 pallet.
the rest was basic weight plus the tanks filled to screaming. As it, the aeroplane, being a 74 could carry that much juice then the maths were simple.
Last edited by Natstrackalpha; 27th Apr 2014 at 21:55.