ISA deviation

[andynuaa]

Dear @junzis,

Thanks for your great tool which facilitates me a lot concerning fuel consumption calculation. While I notice ISA condition is consistently assumed in the code and declared in your project relevant paper, is it possible to take into account ISA deviation when computing fuel flow? I think I may need to overwrite the pressure and temperature calculation (add ISA temperature offset), but not sure if the altitude correlation factor ff_corr_alt should also be modified in fuel.py? Looking forward to your suggestions!

Cheers
Yifan

[junzis]

Perhaps you can convert your altitude to the ISA pressure altitude before fuel estimation? I think this would be the easiest approach that doesn't require you to change the OpenAP code.

[andynuaa]

Thank you! I will have a try