Realistic EPR

[Attilio 4]

Hi I'm writing a gauge of EPR 747-100.

I tried to write the value of EPR according to the N1, but it is unrealistic. I would write a code that would give me a similar behavior (realistic) of the EPR 747 PMDG.

You know tell me which way to go? What are the parameters that PMDG has used for its EPR?

[Luis Hernandez 570]

If you're good enough at statistics (or Excel or any serious statistics software), you may try adjusting a N1-EPR curve, either from Matt Zagoren's checklists, or trying out various conditions with the RFP 742. They are for the 742, but I guess they're better than nothing.

[Attilio 4]

Already I have done but I am not satisfied.

[Luis Hernandez 570]

I recall seeing some people not correlating N1 to EPR, but CN2 (corrected N2) to EPR. You may try going this way using values taken from the RFP 742. Search here and FSDeveloper for discussions regarding EPR vs N2 for the JT8D engines (I know, they aren´t used for the 741/742, but everyone else keeps these correlations in secret).