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I think the title completely says what I need. I use FSX (Flight Simulator X) to simulate flights and while flying the B738 I saw that it consumes much more fuel than the estimated amount, which is calculated by the software. By doing some research in the airplane folder I figured out that the problem is because the wrong Specific Fuel Consumption (SFC) is entered there. And by some research on the net I also found the type of engine that B738 uses. So, right now, I need to know the SFC of the CFM56-7B24/26/27 engine so that I can enter the correct value in FSX.

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  • $\begingroup$ Does it vary by engine type installed? Rolls Royce, GE, Pratt & Whitney, etc? Or by the power setting used? Or the altitude that is used for level flight? I know the power setting and altitude sure affect my fuel burn in my little, by comparison, Lycoming O-360. $\endgroup$ – CrossRoads Aug 18 '18 at 22:21
  • $\begingroup$ Related thread elsewhere: airliners.net/forum/viewtopic.php?t=750059 $\endgroup$ – Cpt Reynolds Aug 18 '18 at 22:25
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SFC for CFM56-7B is 0.5lb/lbf/hr. As an aside, the LeapX is 16% better at 0.42lb/lbf/hr.

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