Lessening engine performance and aerodynamic lift and drag as altitude increases + curve of planet

[gloomy apex]

Just as J:NO does it. As you increase in altitude, there’s less and less O~2~ particles. This results in less drag, but dramatically decreases engine performance as there is less oxygen to supply the combustion of the engine. Also with the lessening O~2~ as altitude increases, aerodynamic lift of wings would as well. You’d begin to stall, even if you have enough speed to keep lift in lower atmosphere levels.
Have this as a toggle able option for players who don’t want to be hampered by the laws of physics.

Also, a subtle but very noticeable curve to the planet would be nice for scenic screenshots of high altitude aircraft like the SR-71.

[open harbor]

Also, turbocharged engines with different power/altitude graph.

[gloomy apex]

This would also effect Props as the atmosphere becomes thinner with less O2 molecules in the air, meaning they have nothing to “grab” onto and push/pull the plane forwards

[halcyon stag]

i also suggested smth like this, sick ass idea, they need to add this

[quaint ridge]

density's calculated in SP1 so perhaps you don't need to ask about it, and perhaps O2 percentage isn't a real problem (unless you want 3000K+ jet temperature)

[eager sedge]

Less drag and oxygen is simulated in SP1, as jet engines tend to have less flames and fuel consumption, while if you keep a fixed pitch prop in SP or even variable pitch, it will over-rev at certain altitudes due to low drag/stall or as I often call it, Prop Slip. I've also encountered this phenomenon in Flyout when having props setup for high speed/low drag instead of high climbrate/high drag. For density... I remember doing some math for it for my Manifold pressure gauge with variable speed supercharger (Jumo 222 engine). For atmospheric pressure, I divided IAS/TAS and then continued on. It's a tad bit wonky, but it works at least. Edensk helped me in this stuff if I remember correctly.