SUBSIM Radio Room Forums - View Single Post - Oxygen in U-boat - U-boat Officer's Reply

LGN1 · 08-19-11, 02:09 PM

Thanks again, Stiebler! Very interesting.

I've read again the first reply of Guenther Paas. He mentions that in most cases the batteries lasted only 18-20 hours with 'sparsamste Fahrt' (most economical speed?) and that at least after 12 hours oxygen/air had to be added (it's not clear whether air or oxygen is meant). I think, the current numbers in h.sie's mod are not too far off from this. Maybe the remaining difference is that at first compressed air was added not oxygen and that in many cases the Chief Engineer waited until the crew gasped for air (as G. Paas mentions in his second reply)

The numbers in h.sie's mod are based on the values given in the original VIIC handbook. There it's mentioned that the oxygen level should not drop below 17.5%. However, I can imagine that back then many commanders/chief engineers didn't care much about the number, but waited until the crew really suffered.

Has anyone access to patrol logs from the Norway campaign? I've read that during this campaign some crews had problems with their oxygen supply.

Regards, LGN1

08-19-11, 02:09 PM	#14
LGN1 Ace of the Deep Join Date: Mar 2006 Posts: 1,138 Downloads: 147 Uploads: 12	Thanks again, Stiebler! Very interesting. I've read again the first reply of Guenther Paas. He mentions that in most cases the batteries lasted only 18-20 hours with 'sparsamste Fahrt' (most economical speed?) and that at least after 12 hours oxygen/air had to be added (it's not clear whether air or oxygen is meant). I think, the current numbers in h.sie's mod are not too far off from this. Maybe the remaining difference is that at first compressed air was added not oxygen and that in many cases the Chief Engineer waited until the crew gasped for air (as G. Paas mentions in his second reply) The numbers in h.sie's mod are based on the values given in the original VIIC handbook. There it's mentioned that the oxygen level should not drop below 17.5%. However, I can imagine that back then many commanders/chief engineers didn't care much about the number, but waited until the crew really suffered. Has anyone access to patrol logs from the Norway campaign? I've read that during this campaign some crews had problems with their oxygen supply. Regards, LGN1