Malfunctions - compressed air leaks

Jimbuna · 06-09-09, 11:53 AM

I'm unaware of any mid patrol 'fixes'.

The one I find most annoying is the refusal of the engines to answer the Full Ahead order.

Paul Riley · 06-09-09, 12:21 PM

Well after my recent resurrection of Willie Werner to the ranks,I just did another deep dive test,with a normal compressor (patrol restart),blew twice and the current level is at about 3.9 (I take it that is 390 litres?),meaning that there WAS a serious leak in the other patrol,and also means that a IIA has more than 2 blasts on the air,as was previously thought.

Leandros · 06-09-09, 02:38 PM

Quote:

Originally Posted by Paul Riley

Well after my recent resurrection of Willie Werner to the ranks,I just did another deep dive test,with a normal compressor (patrol restart),blew twice and the current level is at about 3.9 (I take it that is 390 litres?)

I believe that is a nomer for pressure in the air tanks: 3.9 kg./sq.cm. It is air pressure that drives the water out of the ballast tanks. Less pressure, less power to empty the ballast tanks....No pressure, the water stays in the tanks - no updrift........

Paul Riley · 06-09-09, 02:55 PM

Quote:

Originally Posted by Leandros

I believe that is a nomer for pressure in the air tanks: 3.9 kg./sq.cm.

Sounds about right

Captain Birdseye · 06-09-09, 03:02 PM

I had a malfunction on my sub in '42 in the Med. I only discovered it when being depth charged, the malfunction was that the sub couldn't stay level at over 140 metres. Resulting in sinking unless the engines were at ahead standard or we blew ballast.
My depth test was at 120m

Paul Riley · 06-09-09, 03:43 PM

Interesting Capt. , I never knew about that one.So,this would simulate problems with the trim tanks I expect.I know that when at depths greater than 200m (noticed this in stock game ages ago) the UBoat appears to show problems holding depth (probably due to the extreme weight of water above the UBoat) , unless when faster than 1/3.Not very useful when trying to sneak away from a pursuer.

Captain Birdseye · 06-09-09, 04:54 PM

Hi Paul, I think you could be right, those Ruski POW's must have been tinkering with the trim tanks, I expect a dead cat in there or something

. Anyway, it gave me another thing to think about while being DC'ed. Enjoyed it, funnily enough, timing between blowing ballast when trying to run at silent speed, then going flank speed to rise again and deploying decoys.

(PS: noticed you are a Sheffield chap, i'm from Huddersfield myself!)

Leandros · 06-10-09, 04:31 AM

Quote:

Originally Posted by Paul Riley

Interesting Capt. , I never knew about that one.So,this would simulate problems with the trim tanks I expect.I know that when at depths greater than 200m (noticed this in stock game ages ago) the UBoat appears to show problems holding depth (probably due to the extreme weight of water above the UBoat) , unless when faster than 1/3.Not very useful when trying to sneak away from a pursuer.

As I understand it this might really reflect RL, not necessarily a technical failure. Due to various factors one couldn't keep the boot at exactly the same depth without any speed/rudder inputs....

sharkbit · 06-10-09, 07:36 AM

Quote:

Originally Posted by Captain Birdseye

I had a malfunction on my sub in '42 in the Med. I only discovered it when being depth charged, the malfunction was that the sub couldn't stay level at over 140 metres. Resulting in sinking unless the engines were at ahead standard or we blew ballast.
My depth test was at 120m

Did you crash dive while submerged?

I've noticed a couple times that if you hit C and crash dive while submerged, depth control is impossible at slow speeds. I have to go at about 3-4 knots to stay at the level I want.

Very annoying when trying to be quiet and sneak away from the destroyer coming at you and caused you to panic and crash dive from periscope depth in the first place.
I've tried not to ever do that, but I forgot a couple of days ago and had the issue again.

Warhawk · 06-11-09, 03:07 PM

Quote:

Originally Posted by sharkbit

Did you crash dive while submerged?

I've noticed a couple times that if you hit C and crash dive while submerged, depth control is impossible at slow speeds. I have to go at about 3-4 knots to stay at the level I want.

Very annoying when trying to be quiet and sneak away from the destroyer coming at you and caused you to panic and crash dive from periscope depth in the first place.
I've tried not to ever do that, but I forgot a couple of days ago and had the issue again.

I find that if I crash dive..but before I get to 75 meters at full speed, I hit a to stop at a specific depth..if you slow to silent speed you will sink 10-15 meters below until the sub re-balances the trim tanks and restores buoyancy...remember a crash dive..they flood the tanks to get underwater asap!

1. Crash dive, full throttle
2. Hit a 2x at say 50 meters [7 knots]
3. Hit ahead slow (#1)
4. Sub takes on surfacing posture (nose up) [2 knots]
5. Depth gauge keeps sinking about 10-15 meters then slowly climbs back to 50 meter mark

I don't think I could handle malfunctions...damn planes are pissing me off enough as it is....now to have a damn busted boat! grrrr

06-09-09, 12:21 PM	#2
Paul Riley Ocean Warrior Join Date: Aug 2008 Location: Sheffield, England Posts: 2,679 Downloads: 165 Uploads: 0	Well after my recent resurrection of Willie Werner to the ranks,I just did another deep dive test,with a normal compressor (patrol restart),blew twice and the current level is at about 3.9 (I take it that is 390 litres?),meaning that there WAS a serious leak in the other patrol,and also means that a IIA has more than 2 blasts on the air,as was previously thought. __________________ Best Patrol: 10 merchants + HMS Nelson for 68.056 Tonnes

06-09-09, 03:43 PM	#6
Paul Riley Ocean Warrior Join Date: Aug 2008 Location: Sheffield, England Posts: 2,679 Downloads: 165 Uploads: 0	Interesting Capt. , I never knew about that one.So,this would simulate problems with the trim tanks I expect.I know that when at depths greater than 200m (noticed this in stock game ages ago) the UBoat appears to show problems holding depth (probably due to the extreme weight of water above the UBoat) , unless when faster than 1/3.Not very useful when trying to sneak away from a pursuer. __________________ Best Patrol: 10 merchants + HMS Nelson for 68.056 Tonnes

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06-09-09, 11:53 AM	#1
Jimbuna Chief of the Boat Join Date: Feb 2006 Location: 250 metres below the surface Posts: 190,584 Downloads: 63 Uploads: 13	I'm unaware of any mid patrol 'fixes'. The one I find most annoying is the refusal of the engines to answer the Full Ahead order. __________________ Wise men speak because they have something to say; Fools because they have to say something. Oh my God, not again!!

06-09-09, 03:02 PM	#5
Captain Birdseye Watch Officer Join Date: Feb 2009 Location: Sat behind my desk at BdU tapping away on my Enigma machine. Posts: 339 Downloads: 44 Uploads: 0	I had a malfunction on my sub in '42 in the Med. I only discovered it when being depth charged, the malfunction was that the sub couldn't stay level at over 140 metres. Resulting in sinking unless the engines were at ahead standard or we blew ballast. My depth test was at 120m

06-09-09, 04:54 PM	#7
Captain Birdseye Watch Officer Join Date: Feb 2009 Location: Sat behind my desk at BdU tapping away on my Enigma machine. Posts: 339 Downloads: 44 Uploads: 0	Hi Paul, I think you could be right, those Ruski POW's must have been tinkering with the trim tanks, I expect a dead cat in there or something . Anyway, it gave me another thing to think about while being DC'ed. Enjoyed it, funnily enough, timing between blowing ballast when trying to run at silent speed, then going flank speed to rise again and deploying decoys. (PS: noticed you are a Sheffield chap, i'm from Huddersfield myself!)