I have been testing an idea to extend the current A4 EFM engine model so that it accounts for total (stagnation) pressure and temperature based on inlet velocity, with constant mechanical RPM fuel control. This seems to be doable while retaining most of the original code. So far I have only changed enough to make a proof-of-concept, but it is flyable and behaves pretty well.
The result suggests that while performance at sea level is only mildly impacted, there is a big difference at higher altitude. Climb potential at 30000ft increases by almost 60% (from 3200ft/min to 5000ft/min), bringing it much closer to IRL documented numbers (6000ft/min) at the same weight. The flight manual recommended climb schedule (~M0.75 at altitude) works much better as well. Here is what I'm getting:
Obviously the top speed at altitude is thrown off slightly, and fuel consumption is now too high because the model is still working with uninstalled thrust. It needs a lot more work to be a finished product, but I think that could be worthwhile.
I have been testing an idea to extend the current A4 EFM engine model so that it accounts for total (stagnation) pressure and temperature based on inlet velocity, with constant mechanical RPM fuel control. This seems to be doable while retaining most of the original code. So far I have only changed enough to make a proof-of-concept, but it is flyable and behaves pretty well.
The result suggests that while performance at sea level is only mildly impacted, there is a big difference at higher altitude. Climb potential at 30000ft increases by almost 60% (from 3200ft/min to 5000ft/min), bringing it much closer to IRL documented numbers (6000ft/min) at the same weight. The flight manual recommended climb schedule (~M0.75 at altitude) works much better as well. Here is what I'm getting:
Obviously the top speed at altitude is thrown off slightly, and fuel consumption is now too high because the model is still working with uninstalled thrust. It needs a lot more work to be a finished product, but I think that could be worthwhile.
Any interest in pursuing this further?