From what I can make of the figures the TSFC or SFC means the amount of fuelused for the amount of thrust produced so at takeoff the SFC of .32 would mean that the TO thrust 60000lbX.32 would give consumption of approx 18000lb/hour and the max cruise SFC of .6 with a thrust at 35000ft at .8 mach of 11000lb would mean a cruise figure 6600lb/hr.So I guess the fuel usage calculation would need to calculate thrust relative to altitude and power setting.
But to give some idea what that might mean in terms of distance traveled.The 747-400 travels from LA to Sydney Australia with a flight time of about 12 hours and uses about 400000lb's of fuel.
Don't know if this helps or not.
Cheers Innis
"Jim Wilson" writes
> > > Decreasing the tsfc should decrease fuel consumption. Adjust it up or down
> > until it seems to be consuming at a correct rate. It'd probably be easy
> > enough to estimate the rate you should see if you know the range of the
> > aircraft and how much it should use to get up to cruise. Let me know what you
> > get so I can add it to the config file in cvs.
>
> According to this site tsfc for the C6 80C2-B1F is: 0.564
>
> http://www.bh.com/companions/034074152X/appendices/data-b/table-2/default.htm
I'm not sure if that is the correct value...been tricked before trying to use
data like that in YASim. The web page calls it SFC not tsfc. Note that the
value under TO thrust is lower and AFAIK the lower the value the less fuel
expended in YASIM.
Best,
Jim
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