IAS -> TAS air density model

[KG26_Alpha]

Originally Posted by Alberich

Hello,
this is my first posting here and I hope this is the right place to post and the subject was not discussed already. Searching the forums did not help me finding the desired information though.

I am interested in how IL2 1946 models the atmosphere, especially how the game derives TAS. Is, for example, air temperature (and its effect on air density) taken into consideration?

Right now I use the '2%-rule of thumb' to derive my TAS (from IAS and altitude above sealevel) which says that TAS increases by 2% every 300 meters of altitude. Well, that is just a rule of thumb...
When dropping bombs with the Pe-2 (OPB-1 bombsight, no bombsight automation) it looks like the error made by this rule of thumb leads to quite incorrect bombsight-angles.
Some information on this topic would be greatly appreciated!

Alberich

Don't forget unless you are level bombing at sea level you will have to +/- the targets terrain altitude from the bombsite altimeter setting, unless your using the Norden sight.

These might help you with your 2% calculation.

I'm creating a new chart for KPH as its a bit old n fuzzy, so bear with me. < (DONE)

[FrankB]

Recently I came across this utility: Bombsight Table for Android.
On my android tablet it does not use the screen space optimally, but on a phone it looks great. The guy seems to use the 2% per 1000ft formula as the old Bombsight table.