How to properly use prop pitch in IL-2 Cliffs of Dover

[SIDWULF]

I notice in IL-2 Cliffs of Dover the prop pitch settings have a noticeble effect on speed. Now in IL-2 1946 I never used prop pitch because from what i know %100 prop pitch was the best setting for all situations except for diving (even then i never used it because engine damage from over reving was non-exsistant). I never touched prop pitch at all untill i noticed that in COD lowering the prop pitch in the 109 ment greater speed.

This is confusing as i now have to constantly monitor my prop pitch settings.

What i want to know is what is the ideal prop pitch setting for combat, climbing, and diving.

Please list them by % so i can set a key for them, I hate fiddling with settings all the time and would just like to set a key for climb/combat/diving.

And could someone explain to me how prop pitch works and why am i getting faster speed at lower settings?

And why is IL-2 1946 not modeling this?

Thanks! I am very experienced with IL-2 1946 but for the reasons mentioned never knew much about prop pitch.