Fuel Burn Rates

[zoink]

Hi All

Would anybody have any refernce material for the fuel burn rates of commercial aircraft?

I'm looking for some figures for flying a 747-400 or A340-500 from London to Singapore or other long haul routes.
I understand there are so many variables in the fuel burn values with weather and all but any "questimates" would be very useful!!

Thanks
z..

[The Greaser]

I would budget for around 2.5 tonnes per hour per engine. Hence on a 10 hour flight you would burn about 100 tonnes.

[The SSK]

I have some data that suggests a 747-400 generates between 16 and 18 passenger-km per litre of fuel, A340-300 between 17 and 21.

Because of tankering effects (burning fuel to carry fuel) very long haul sectors are less efficient - you would burn less fuel on LON-SIN with an intermediate stop half way.

[mutt]

you would burn less fuel on LON-SIN with an intermediate stop half way.

Very true, however the fuel savings would be less than the associated costs of the technical landing!

Mutt.

[Rainboe]

and faced with a choice of flying direct or stopping at, say, Dubai, to take on some fuel purely to save a tiny amount, then who will your customers throw their money at?

[The SSK]

Mutt and Rainboe, I don't deny your arguments, but can you back them with facts? Will it be a 'tiny' amount? Will it be less than the cost of the landing?

I posted data. You posted suppositions.

[Intruder]

I'm looking for some figures for flying a 747-400 or A340-500 from London to Singapore or other long haul routes.

About 3.3 T/hour/engine at max T/O GW, decreasing to 1.5 T/hr/engine for an empty airplane. 10 T/hr is a good approximation for medium weights, long range.