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Guest Charlie Hall

747-400 fuel flow: What to adjust and where ?

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I've tweaked the fuel flow scalar of most of my 747-400s so that they closely reflect Boeing book values at StAt. But I find that if I remain at a set FL for several hours, the rate at which fuel is burned does not decrease as fast as the Boeing data indicate, i.e., I am burning too much fuel than I should be.Do I need to change the fuel flow "gain" factor to fix this? If so, which way does it go? It seems to be set for many jets at 0.002 although some folks have set theirs to 0.001. These are very tiny values and I am wondering in which direction to adjust the gain to reduce the rate at which fuel is consumed.Appreciate any advice on this, thanks!JS

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I think most here agree that fuel flow gain affects the spool up rate, not the consumption, so I think you need to concentrate on the fuel flow scalar value.

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