> Is this behaviour a bug or a feature ?
>
> Where is the fuel consumption calculated ?
It's in FGTurbine.cpp:
double correctedTSFC = TSFC + TSFC - (N2norm * TSFC);
FuelFlow_pph = Seek(&FuelFlow_pph, thrust * correctedTSFC, 1000.0,
100000);
The published TSFC value is usually for cruise conditions, so I've made it
vary with N2 to better model fuel flows at low N2, where the compressor is
inefficient. I matched the results with known fuel flow values for the
CFM-56, and the results are pretty good.
Do you have a better formula to vary TSFC? If so let's get it into the model.
Dave
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David Culp
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