Quote:
Originally Posted by h.sie
In some tests, I saw the following behaviour: Situation:
- submerged
- battery = empty
- compressed air = empty
If you now order to surface the quick-diving tank is emptied and the Uboat surfaces. Is this correct behaviour??
Question: How were the diving-tanks emptied?
- By pump (->battery supply) or
- by pressure air (->compressed air supply)
- or both of them
|
IIRC, all tanks could be emptied with compressed air. At least the Regelzellen, Regelbunker, Trimmzellen, and Tauchzelle 3 could be emptied via the pumps. Thus, the u-boat could surface both with enough battery power and with enough compressed air (However, I don't know whether surfacing without electric power could be done in a controlled manner). If you are interested in further details, the original handbook of the VIIC contains much information about this.
The quick diving tank was usually emptied immediately after the boat submerged, i.e., it should be always empty when submerged for a longer time. Its purpose was just to get the boat quickly below the surface.
Quote:
Originally Posted by Sag75
I tested this. I emptied the batteries (needle on zero, no speed at all at ahead flank) and the tank by continuosly pressing key "E" and reordering the depth before surfacing.
At these conditions, at all engines stopped, I was still able to surface in 15' from 100meters pressing "E" key, or "S"! Also I was still able to change the depth acting on the needle of the depthmeter.
However even if the crew said to me we were out of compressed air, and I pressed E for long time to exhaust all air, I noticed the pressure air-meter needle never went on zero, but it stopped at 1 notch over zero.
I guessed I got the same behaviour of the batteries and amperometer before your fix!
I hope this help!
|
The compressed air dial measures the pressure, i.e., it should never reach 0. Since the u-boat was usually trimmed slightly positive, the slow surfacing might actually be quite realistic
Cheers, LGN1