SUBSIM Radio Room Forums



SUBSIM: The Web's #1 resource for all submarine & naval simulations since 1997

Go Back   SUBSIM Radio Room Forums > General > Sub & Naval Discussions: World Naval News, Books, & Films
Forget password? Reset here

Reply
 
Thread Tools Display Modes
Old 01-17-13, 02:07 PM   #1
ABBAFAN
Commander
 
Join Date: Sep 2001
Posts: 455
Downloads: 0
Uploads: 0
Default Submarine questions

When a submarine is running on the surface with both diesels on propulsion, does this mean he batteries are powering everything on board? Is there no other generator for lighting etc? How long would it take to charge up air and batteries at the same time? Would it be only one of the diesels connected to the dynamo or could both charge at the expense of propelling the vessel?

Also, if ballast is blown at a great depth would water need to be taken on on the way up to compensate for air in the ballast tanks expanding as the water pressure drops?
__________________
CHOOSE RFA! LESS GRAFT, MORE PAY.
ABBAFAN is offline   Reply With Quote
Old 01-17-13, 02:23 PM   #2
AVGWarhawk
Lucky Jack
 
AVGWarhawk's Avatar
 
Join Date: Jun 2005
Location: In a 1954 Buick.
Posts: 27,339
Downloads: 90
Uploads: 0


Default

What type of submarine are you inquiring about?
__________________
“You're painfully alive in a drugged and dying culture.”
― Richard Yates, Revolutionary Road
AVGWarhawk is offline   Reply With Quote
Old 01-17-13, 03:34 PM   #3
ABBAFAN
Commander
 
Join Date: Sep 2001
Posts: 455
Downloads: 0
Uploads: 0
Default

With regards to the diesels then Uboats. But any submarine with regards the ballast question.
__________________
CHOOSE RFA! LESS GRAFT, MORE PAY.
ABBAFAN is offline   Reply With Quote
Old 01-17-13, 06:49 PM   #4
Platapus
Fleet Admiral
 
Join Date: Oct 2006
Posts: 18,852
Downloads: 63
Uploads: 0


Default

Fleet boats had a smaller engine/generator that could be used to power some of the support systems while on the surface.

BTW, you have a lot of nerve asking a legitimate submarine question here in GT.

Don't you know that GT is for whining and illogical emotional comments only?
__________________
abusus non tollit usum - A right should NOT be withheld from people on the basis that some tend to abuse that right.
Platapus is offline   Reply With Quote
Old 01-17-13, 07:10 PM   #5
Sailor Steve
Eternal Patrol
 
Sailor Steve's Avatar
 
Join Date: Nov 2002
Location: High in the mountains of Utah
Posts: 50,369
Downloads: 745
Uploads: 249


Default

If you're talking about modern diesel submarines, I'm pretty sure they are all improved versions of the diesel-electric drives developed by the Americans prior to WW2. The diesel engines do nothing but drive the generators. The generators 1) Drive the motors which propel the sub, 2) power the boat's systems, and 3) recharge the batteries. Of course while submerged the batteries drive the motors and power the systems. There is also at least one small axhiliary diesel engine which drives its own generator to help supply power and ease the load of the main generators.
http://www.maritime.org/fleetsub/elect/chap2.htm#2A

If you meant WW2 u-boats, they had the engines either propel the boat directly or recharge the batteries.


Quote:
Originally Posted by Platapus View Post
BTW, you have a lot of nerve asking a legitimate submarine question here in GT.
On the other hand we have a whole forum dedicated to this sort of thing.
http://www.subsim.com/radioroom/forumdisplay.php?f=186
__________________
“Never do anything you can't take back.”
—Rocky Russo
Sailor Steve is offline   Reply With Quote
Old 01-18-13, 06:36 AM   #6
ABBAFAN
Commander
 
Join Date: Sep 2001
Posts: 455
Downloads: 0
Uploads: 0
Default

With regards to the boats in SH3, Where you have a choice of having a diesel drive the generator or propell the boat with the other one, would having both propell the boat allow the battaries to slowly drain on the surface due to powering lights etc while both diesels are driving the screws? I know the game is a simplification of reality but just wondered. Would a uboat have had a mini generator for when both diesels are propelling the boat? As there would still be electrical needs of course.
__________________
CHOOSE RFA! LESS GRAFT, MORE PAY.
ABBAFAN is offline   Reply With Quote
Old 01-18-13, 07:30 AM   #7
troopie
Captain
 
Join Date: Oct 2010
Location: Oz
Posts: 507
Downloads: 33
Uploads: 0
Default

Unkie Neil posted this youtube link to a USN training vid not long ago:

http://www.subsim.com/radioroom/showthread.php?t=200577


It won't answer your in-game questions but it provides great insight into the workings of a WWII sub
__________________
Serial pest
troopie is offline   Reply With Quote
Old 01-18-13, 08:09 AM   #8
ETR3(SS)
Ocean Warrior
 
Join Date: Dec 2007
Location: Between test depth and periscope depth
Posts: 3,021
Downloads: 175
Uploads: 16
Default

With regards to your second question, if you're in a situation where you are blowing your ballast tanks you probably are intending to surface. Otherwise if you just wanted to change depth, you use the planes. So no, you wouldn't blow ballast and then turn around and re-flood the tanks. To do so would be a waste of a limited resource, compressed air.
__________________


USS Kentucky SSBN 737 (G)
Comms Div 2003-2006
Qualified 19 November 03

Yes I was really on a submarine.
ETR3(SS) is offline   Reply With Quote
Old 01-18-13, 12:20 PM   #9
Pisces
Silent Hunter
 
Join Date: Dec 2004
Location: AN9771
Posts: 4,892
Downloads: 300
Uploads: 0
Default

Quote:
Originally Posted by Sailor Steve View Post
... axhiliary ...
Busted at your own pet peeve ....
Pisces is offline   Reply With Quote
Old 01-18-13, 12:36 PM   #10
AVGWarhawk
Lucky Jack
 
AVGWarhawk's Avatar
 
Join Date: Jun 2005
Location: In a 1954 Buick.
Posts: 27,339
Downloads: 90
Uploads: 0


Default

Quote:
Originally Posted by Pisces View Post
Busted at your own pet peeve ....
__________________
“You're painfully alive in a drugged and dying culture.”
― Richard Yates, Revolutionary Road
AVGWarhawk is offline   Reply With Quote
Old 01-18-13, 01:52 PM   #11
Sailor Steve
Eternal Patrol
 
Sailor Steve's Avatar
 
Join Date: Nov 2002
Location: High in the mountains of Utah
Posts: 50,369
Downloads: 745
Uploads: 249


Default

Quote:
Originally Posted by troopie View Post
Unkie Neil
You may be hearing from Onkle Neal soon.
__________________
“Never do anything you can't take back.”
—Rocky Russo
Sailor Steve is offline   Reply With Quote
Old 01-18-13, 01:57 PM   #12
Sailor Steve
Eternal Patrol
 
Sailor Steve's Avatar
 
Join Date: Nov 2002
Location: High in the mountains of Utah
Posts: 50,369
Downloads: 745
Uploads: 249


Default

Quote:
Originally Posted by Pisces View Post
Busted at your own pet peeve ....
Quote:
Originally Posted by AVGWarhawk View Post
You guys never actually read anything I write, do you? Yes, an embarrassing typo, but only a typo, which I never mention to others.

My own pet peeve is abuse of the language, not spelling. A so-called native English-speaker who doesn't know the difference between "your" and "you're", between "where", "wear" and "ware", between "there", "their" and "they're" is what annoys me. People who are too lazy to learn their own language. When I've been called on those myself I've been appropriately contrite. But spelling? It happens.

As I said, it looks like neither of you has ever actually read what I've written on the subject, and neither of you has a clue as to my "peeves", pet or otherwise.
__________________
“Never do anything you can't take back.”
—Rocky Russo
Sailor Steve is offline   Reply With Quote
Old 01-18-13, 02:28 PM   #13
AVGWarhawk
Lucky Jack
 
AVGWarhawk's Avatar
 
Join Date: Jun 2005
Location: In a 1954 Buick.
Posts: 27,339
Downloads: 90
Uploads: 0


Default

Quote:
As I said, it looks like neither of you has ever actually read what I've written on the subject, and neither of you has a clue as to my "peeves", pet or otherwise.
Sure Steve. Watever you say.
__________________
“You're painfully alive in a drugged and dying culture.”
― Richard Yates, Revolutionary Road
AVGWarhawk is offline   Reply With Quote
Old 01-18-13, 04:28 PM   #14
Sailor Steve
Eternal Patrol
 
Sailor Steve's Avatar
 
Join Date: Nov 2002
Location: High in the mountains of Utah
Posts: 50,369
Downloads: 745
Uploads: 249


Default

Quote:
Originally Posted by AVGWarhawk View Post
Sure Steve. Watever you say.
What part of "That's my story, and I'm stickin' to it!" did you not understand?
__________________
“Never do anything you can't take back.”
—Rocky Russo
Sailor Steve is offline   Reply With Quote
Old 01-19-13, 05:44 AM   #15
ABBAFAN
Commander
 
Join Date: Sep 2001
Posts: 455
Downloads: 0
Uploads: 0
Default

Returning to the point in hand, I meant that blowing ballast deep will lead to the air in the ballast tanks expanding and pushing more water out as the boat rises won't it? Is there a way they compensate for this?
__________________
CHOOSE RFA! LESS GRAFT, MORE PAY.
ABBAFAN is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:43 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright © 1995- 2024 Subsim®
"Subsim" is a registered trademark, all rights reserved.