Solutions
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vgtu-154m's post in Enroute fuel burn performance was marked as the answerA closer investigation after a series of 20-30 flights have now revealed the following:
i) For stage lengths and flight times between 500 to 2000 nmi (2-6hrs), it is recommended to use a fuel bias of M10 in the Simbrief profile.
ii) For stage lengths between 2000 and 4000 nmi (6-9hrs), it is recommended to use a fuel bias of M12-M13 in the Simbrief profile.
iii) For stage lengths above 4000 nmi (>9hrs), the fuel bias of M14-M15 brings Simbrief profiles in line with the Tristar we have in the Sim.