737 Fuel Burn Figures.

[Relaxed Redback]

Re 737 all series.
Would anyone here have an idea of differing fuel burn figures for various altitudes (LRC MRC etc)?
Is there a rule of thumb with these figures , particularly with holding ?
Is there a fuel burn formula for various speeds / weights /configurations ?.
PS is there a marked difference between Classic and NG figures?
Thank-you.:D

[Sheep Guts]

Heres some rules of thumb on 737s hope this helps


http://www.b737.org.uk/rulesofthumb.htm



Regards
Sheep

[jetblues]

The b737.org website is great, however the rule of thumb tables are for the classic. Is ther one for the NG available ??