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Boeing 777 Fuel Consumption  
User currently offlinedkramer7 From Australia, joined Jun 2008, 133 posts, RR: 0
Posted (4 years 6 months 2 weeks 3 days 10 hours ago) and read 23264 times:

Hi all Does anyone know the averag fuel consumption for the Boeing 777-200ER/200LR and 300ER please?

5 replies: All unread, jump to last
 
User currently offlineStitch From United States of America, joined Jul 2005, 31440 posts, RR: 85
Reply 1, posted (4 years 6 months 2 weeks 3 days 10 hours ago) and read 23198 times:
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Depends on the mission and configuration.

He didn't mention the mission, but Zeke noted a CX 777-300ER burns an average of 8100kg an hour (6,500 to 10,500kg across the flight).

Some EK Fleet Ops folks provided trip fuel weights for flights on 10 April 2008:

777-300ER DXB-JFK: 109t (Flight Time: 13h30m)
777-200LR GRU-DXB: 102t (Flight Time: 13h45m)

I don't really understand all the acronyms, but here is some more data on LAX-DXB with an EK 777-200LR:

TRIP KLAX 138615 1547
CONT 20MINS 2929 0020
ALTN KLAS 6366 0044
FINL 3405 0030
T/O FUEL 151315
TAXI 912 0019
MIN FUEL 152.3 17:21

EZFW 220685 MZFW 229000 AZFW
ETOW 372000 MTOW 372000 RTOW
ELWT 233385 MLWT 243000 RLWT


User currently offlinePihero From France, joined Jan 2005, 4680 posts, RR: 77
Reply 2, posted (4 years 6 months 2 weeks 3 days 9 hours ago) and read 23112 times:
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Quoting Stitch (Reply 1):
don't really understand all the acronyms,
Quoting Stitch (Reply 1):
TRIP KLAX 138615 1547 Trip fuel - i.e estimated burn-off - to LAX 138,615 kg / 15 hours and 47 mins flight time
CONT 20MINS 2929 0020 What we call "contingency fuel" to cope with adverse changes to the original flight plan. Here it is the required fuel at the days conditions for an extra 20 mins flight time and it's worth 2,929 kg
ALTN KLAS 6366 0044 Fuel to the designated alternate (Las Vegas) : 6366 kg / 44 mins
FINL 3405 0030 Final reserve, the one you should be at the absolute minimum l;anding with ; 3405 kg / 30 mins ( you see then the definition of that min fuel )
T/O FUEL 151315 that's the fuel at takeoff, the sum of all quantities above
TAXI 912 0019 the fuel used for taxi
MIN FUEL 152.3 17:21 Tha'ts the legal minimum fuel to start the mission, all parameters considered : weather, loads, routings...etc... See that here, it's the simple rounded sum of the trip fuel and the taxi fuel

EZFW 220685 MZFW 229000 AZFW Estimated / Max structural / Actual (to be filled later "Zero FUel Weight"
ETOW 372000 MTOW 372000 RTOW Same for Takeoff weight
ELWT 233385 MLWT 243000 RLWT
Idem for landing weight

Very simple, ain't it?



Contrail designer
User currently onlinecobra27 From Slovenia, joined May 2001, 1034 posts, RR: 0
Reply 3, posted (4 years 6 months 2 weeks 3 days 1 hour ago) and read 22816 times:

Quoting Pihero (Reply 2):

Very simple, ain't it?

Aviation & military are filled with acronyms, not that I know almost thousand of them but still don't like them


User currently offlineStitch From United States of America, joined Jul 2005, 31440 posts, RR: 85
Reply 4, posted (4 years 6 months 2 weeks 2 days 22 hours ago) and read 22755 times:
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Quoting Pihero (Reply 2):
Very simple, ain't it?

It is when you have someone who gets it explain it to you.     


User currently offline744lover From United States of America, joined Nov 2000, 187 posts, RR: 0
Reply 5, posted (4 years 6 months 2 weeks 1 day 18 hours ago) and read 22512 times:

There it goes:

TRIP KLAX 138615 1547 138615 Kg of Fuel 15 hours 47 minutes endurance
CONT 20MINS 2929 0020 2929 Kg of Fuel 20 minutes
ALTN KLAS 6366 0044 6366 Kg of Fuel 44 minutes
FINL 3405 0030 3405 Kg of Fuel 30 minutes
T/O FUEL 151315 151315 Kg of Fuel -- Fuel that the plane should have at the beggining of the takeoff roll
TAXI 912 0019 912 Kg of Fuel 19 minutes
MIN FUEL 152.3 17:21 152300 Kg of Fuel 17 hours and 21 minutes of endurance


Basically:

TRIP FUEL - Fuel needed to go from point A to B. Just considering distance and winds
CONTINENCY - Fuel for an eventual emergency that would last 20 minutes
ALTERNATE - If destination airport gets closed or the aircraft is unable to land there, this is the fuel needed for the "alternate" airport
FINAL - Fuel needed for 30 minutes of holdings and vectorings
T/O FUEL - Fuel that the aircraft should have at the beggining of takeoff roll
TAXI FUEL - Fuel used on PUSHBACK, ENGINE STARTUP, and TAXI to the active runway
MIN FUEL - Minimum fuel that should be pumped up. Additional fuel requirements are: Weather factors (deviations from fronts, CBs and so on), etc...


Hope this helps!


Best regards!
744lover


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