Disclaimer: I don’t have access to the Features category, so I’m making do with General.
Onto the actual topic, I think that instead of completely reworking these airplanes like some have suggested I think merely a physics rework would be adequate. (Especially in the C130’s case)
Currently, at high loads it is difficult to gain altitude and speed, making it impossible to get to ideal altitudes. While before the update it was possible just to reduce fuel amount, with fuel burn in global the fuel is needed.
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