|Quoting ferpe (Thread starter):|
what is the normal consumption strategy from an FCOM or SOP perspective?
The systems are different but the basic philosophy is :
- Improve the wing bending moment, hence :
- Center tank first
- Wing inner tanks second
- Wing outer last.
It is to be noted that, apart from the fuselage center tank, we do not empty the remaining tanks before switching to the next.
For instance, the A330 / 340 engines are always fed from the wing inners
That means that fuel will be transferred from the center to the wing inners,
Then from the wing outers to the inners.
That basic philosophy stems from the A320 system.
On the 744, things are quite a bit more complicated as the engines are fed either from the center or from each engine tank... The 777 has a much simpler system, quite similar to the Airbus set-up, but engine feed can be - and is initially - from the fuselage tank.
That philosophy here is of course very simplistically described ( for instance, the *triggereing* levels of transfer are not included, nor is the influence of the tail trim tank for CoG control ... etc... )