Technical Question - Engines

3Jane · 12-13-06, 08:45 AM

As the diesels would require air to function, they can only be used whilst submerged by fitting a Schnorkel. In real life U-boats ofen used electric (e-motors) motors whilst on the surface, such as when entering and leaving docking areas. But the choice of switching off the diesels and using the e-motors when running on the surface is something which as far as I know isn't moddled into the games software.

VIICDriver · 12-13-06, 09:44 AM

Was it not true that if for whatever reasons the diesels running at standard had only the air inside the submarine to feed them that they would evacuate the entire subs air supply in like 3 seconds and turn the tube into a vacuum?

Think I read that in Iron Coffins, then the men working in an almost "outer space" type environment would have to clear whatever was keeping the schnorkel from supplying air. Or die.

Chuck

AVGWarhawk · 12-13-06, 09:48 AM

Yes, what would happen if the schnokel submerged for a brief second, this was enough time for the diesels to suck the air up inside the boat. Ears popped, eyes bulged, lungs hurt and headaches occurred. For a guy like me who has had three collapsed lungs, I would not want to try this out for fun

Lanzfeld · 12-13-06, 11:10 AM

I do believe that it took longer then 3 seconds however. Not sure of the exact time.

bigboywooly · 12-13-06, 11:15 AM

You have to remember to that with snorkel raised the uboat could only do around 6 kts or it would snap off
And I think its safe to say that in rough weather it wouldnt be used

AVGWarhawk · 12-13-06, 11:18 AM

Quote:

Originally Posted by Lanzfeld

I do believe that it took longer then 3 seconds however. Not sure of the exact time.

I bet it didn't. These diesels were very large and I suspect each piston in high rpm sucked quite a few cubic feet of air rather quickly. There is a way to find out. We need to know the litre of each piston, the cubic feet air within the boat. How many revolutions (intake stroke) each piston is making. I do not have access to this information.

We also have to consider that the air taken is not replaced as the boat is submerged. I bet it gets real ugly real fast.....

Sailor Steve · 12-13-06, 11:28 AM

To the first question: electric motors can be used on the surface, but the electricity has to come from somewhere. It can be (and is) stored in batteries, but the electricity gets used up (which is why they are actually known as storage batteries) and they have to be recharged. This can only be done by applying an outside source, such as a generator which has to be run by something like a diesel engine.

_Seth_ · 12-13-06, 11:31 AM

Does anyone know the names of the engines used by german u-boats? IE: MAN or anything like that...Like the ViiC, for instance.. How many HP, how many pistons and so on... Technical data, all in all...:hmm:

12-13-06, 08:45 AM	#1
3Jane Ace of the Deep Join Date: Sep 2006 Location: York. Northern England. Posts: 1,004 Downloads: 0 Uploads: 0	As the diesels would require air to function, they can only be used whilst submerged by fitting a Schnorkel. In real life U-boats ofen used electric (e-motors) motors whilst on the surface, such as when entering and leaving docking areas. But the choice of switching off the diesels and using the e-motors when running on the surface is something which as far as I know isn't moddled into the games software. __________________ Fate opposes me in vitality and morality, forced ever onward, burdened, always in shackles. So this very moment, without tarrying, pluck the quivering strings. Because fate punishes the one who plays, all lament with me. (http://hosted.filefront.com/KatherineRowan)

12-13-06, 09:48 AM	#3
AVGWarhawk Lucky Jack Join Date: Jun 2005 Location: In a 1954 Buick. Posts: 28,298 Downloads: 90 Uploads: 0	Yes, what would happen if the schnokel submerged for a brief second, this was enough time for the diesels to suck the air up inside the boat. Ears popped, eyes bulged, lungs hurt and headaches occurred. For a guy like me who has had three collapsed lungs, I would not want to try this out for fun __________________ “You're painfully alive in a drugged and dying culture.” ― Richard Yates, Revolutionary Road

12-13-06, 11:15 AM	#5
bigboywooly Rear Admiral Join Date: Apr 2006 Location: Swindon, England Posts: 10,151 Downloads: 35 Uploads: 0	You have to remember to that with snorkel raised the uboat could only do around 6 kts or it would snap off And I think its safe to say that in rough weather it wouldnt be used __________________ My mediafire page http://www.mediafire.com/?11eoq19bq9r41

12-13-06, 11:28 AM	#7
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	To the first question: electric motors can be used on the surface, but the electricity has to come from somewhere. It can be (and is) stored in batteries, but the electricity gets used up (which is why they are actually known as storage batteries) and they have to be recharged. This can only be done by applying an outside source, such as a generator which has to be run by something like a diesel engine. __________________ “Never do anything you can't take back.” —Rocky Russo

12-13-06, 11:31 AM	#8
_Seth_ Ocean Warrior Join Date: Dec 2005 Location: In Tromsoe, @Tirpitz' final resting place.. Posts: 3,277 Downloads: 94 Uploads: 0	Does anyone know the names of the engines used by german u-boats? IE: MAN or anything like that...Like the ViiC, for instance.. How many HP, how many pistons and so on... Technical data, all in all...:hmm: __________________

12-13-06, 09:44 AM	#2
VIICDriver Engineer Join Date: Nov 2006 Location: Lynchburg, VA Posts: 203 Downloads: 2 Uploads: 0	Was it not true that if for whatever reasons the diesels running at standard had only the air inside the submarine to feed them that they would evacuate the entire subs air supply in like 3 seconds and turn the tube into a vacuum? Think I read that in Iron Coffins, then the men working in an almost "outer space" type environment would have to clear whatever was keeping the schnorkel from supplying air. Or die. Chuck

12-13-06, 11:10 AM	#4
Lanzfeld Grey Wolf Join Date: Jan 2002 Location: New Tripoli, PA Posts: 994 Downloads: 64 Uploads: 0	I do believe that it took longer then 3 seconds however. Not sure of the exact time.