IAS and TAS related to air density

[AcariaPlainum]

Hi guys

I wanted to know if the game measures IAS or TAS speed for planes or even both and if weapons speed is also IAS?

Also i wanted to know what the game factors IAS does it account for temperature and compression or simply by altitude?

I am  aware some aircraft could display both but im talking the game display on the lower left corner

[mue]

The info box in the corner shows KIAS.
If you enable debug output with DisplayDebug=true in HUDDATA.INI, then you get a lot of additional infos, including KTAS. You can circle with ALT-D through the various display modes.
I assume that TK implemented a model of the standard atmosphere that gives the air density at any given altitude and from there IAS is calculated.