Silentway,
CO2 seems to accumulate faster than your batteries wear down, from my experience. I can run at 2 kts and will run out of "air" before I run out of power. I don't know if this is accurate. It would depend on a lot of things as most times boats were under for extensive periods of time they were being DC'ed. Which means they were probably using more power than just running at 2 kts (rapid burst to move from under the DC's). And under these circumstances, the boat would probably run out of power before it ran out of "air".
However, I've read accounts of uboats being under for over 30 hrs. I haven't tried, but I don't think you can do that in SH3 (and I'm using GW).
As far as crew number having an affect on CO2 accumulationg, it doen't matter.
Hope that helps some.
J
|