Once again, thank you. Unfortunately I cant get into why I want this info, but I most certainly appreciate all the input.
4-dogs,
We used to have a
valid aircraft performance decrement measurement system on some of our older Boeing aircraft. They were called Flight Engineers!
As for your question
What has the start of climb altitude and end of descent altitude got to do with cruise fuel flow?
Under the regulations (FAA), you are obliged to have 30 minute International/45 minute Domestic fuel reserve for hold at 1,500 feet. However the regulations do not say what this fuel flow should be based on. You may find that it is generally acceptable to use the fuel flow for a normal cruise level for this time period.
The same applies for the 10% contingency fuel, using computer flight plans, this fuel is based on the fuel flow for the last two segments prior to the top of descent, this relates to the lowest fuel flow.
Mutt