I used to think that almost all of an airliner's fuel consumption was during actual flight; but it seems that even while on the tarmac or at a gate it consumes a non-negligible amount.
So, in general for modern passenger airliners (say, produced over the past 20 years) and without regard to a specific manufacturer or model:
Let 1.0 be the normalized rate of fuel consumption at typical cruising speed. How much fuel is consumed, on average / typically, when...
- Loading passengers?
- Taxiing?
- Waiting on the tarmac for clearance to take off?
- Accelerating and taking off?
- Climbing?
- Descending?
- Touching down and breaking?
Again, rough typical figures please. Or - you could give a concrete example which you believe is representative of the general case.
