Hi h.sie,
great that you are looking into the CO2 issue
Thanks a lot. Here is again all the information I have about it:
In-game times (independent of number of crewmen and silent running setting):
IIA: 30h
VIIC: 36h
IXB/IXD2: 40h
XXI: 46h
Historical technical requirements:
IIA/D: ?
VIIC: 72 hours with 37 men
IXC: 72 hours with 44 men
XXI: 150 hours with 50 men
Unfortunately, I don't have any information about the type II. However, I think it is also the least important one because it's mainly used in the early war and in this period you do not need to stay submerged for long periods of time.
From the dials.cfg it seems that the CO2 value in game is between 0 and 1:
[Dial43]
Name=CO2 level
Type=39; DIAL_CO2
Dial=0x0
CrtVal=0x3F300004
NewVal=0x0
DialVal=-90,90
RealVal=0,1; normalized
Circular=Yes
It would be great if one could make the CO2 build-up dependent on the number of crewmen and the 'silent running' setting. In this case the 'silent running' setting would become more important and you would be punished for leaving the harbor with as many men as possible.
Once again, thanks for all your efforts!
Cheers, LGN1