Air Density in Game?

[AcariaPlainum 29]

So i did some testing with some Missiles and wanted to calculate Air density

And this is what i got which seems really wrong but at the same time i did in  game testing

For context IRL air density usually is around 1.225kg/m3 at Sea level at 15C with normal humidity and pressure

Now that either means SF2 Air density is scuffed, Im doing something wrong or SF2 might model air compression from flying?

 

Edited August 5, 2023 by AcariaPlainum

[+Menrva 4,003]

This is an interesting post! I always wondered about it when I made the experimental Moon and Mars terrains. In the EnvironmentSystem.ini file we could tweak the coefficient of gravity, but nothing about air density and atmospheric pressure. Those things must be hardcoded in some way.

[bazillius 1,252]

I dont hink air present in game at all. As its in X-Plane. When you write FM you write the data exectly in wing or slat or what you werite. Its not depends of environment at all. As i think. So, if you will model a grand piano and write the data into it, even in the keys, even in the lid, it will still fly

Edited August 5, 2023 by bazillius
unfinished thought

[+mue 707]

Your numbers are consistent regarding the drag force equation. Therefore I think one or more of your input parameters are wrong.
Since you want to calculate air density I assume the other parameter are the input. What seems odd with your input parameters is a drag force of 34 kN on an area of 0.46 cm^2 (=0.000046 m^2).

Edited August 5, 2023 by mue

[simonmiller416 1,157]

 "Testing with some Missiles", I think is not a good way,cuz the aerodynamics of the missiles in SF2 seem to be oversimplified, I think it's almost purely linear as a function of supersonic or subsonic drag, altitude doesn't count.

The height seems to be more of an impact on the engine.

[AcariaPlainum 29]

2 hours ago, mue said:

Your numbers are consistent regarding the drag force equation. Therefore I think one or more of your input parameters are wrong.
Since you want to calculate air density I assume the other parameter are the input. What seems odd with your input parameters is a drag force of 34 kN on an area of 0.46 cm^2 (=0.000046 m^2).

Yeah i made  some mistakes

But even corrected it doesnt make sense in the opposite direction

[+mue 707]

I'm still not sure what do you want to achieve or what do you expect?
Where do the input parameter coming from?

[Wrench 9,476]

to end the argument ..................... long long time ago* , I can still remember when TK used to post here ... and when asked the question, air density IS modeled for altitudes.

nuff said

 

* early 2000s

 

[AcariaPlainum 29]

13 hours ago, mue said:

I'm still not sure what do you want to achieve or what do you expect?
Where do the input parameter coming from?

Well speed i obviously know

Same with the coefficient 

Area is in the data too

The  test is done at Sea level

Sustained Accel can give us drag force by having the same effect as terminal velocity would by maintaining mach 3