The model also models RAM drag, Net and Gross thrust, this part seems pretty good.
The problem is that the model most likely models
an engine with lower bypass ratio than modern
turbofans have - BR 5 -> 6+, giving us less
thrust in low altitude and low speed than we need.
In other words, the thrust curve SHAPE is of.
The thing is the author cant answer what BR he is
basing the model on, and we cant really tell unless
we have som real life numbers to compare with.
To put it in another way, we are trying to determine if its the sim thats wrong or the acf model. We have strong indication it is the sim
judging from real FDR data. But we need better
evidence
Cheers,
M