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Author Topic: Ohio Replacement Submarine  (Read 22606 times)

Offline Triton

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Ohio Replacement Submarine
« on: December 20, 2013, 09:26:14 pm »
Artist's impression of Ohio Replacement Submarine (formerly the SSBN-X Future Follow-on Submarine) released on Sept. 6, 2012.

Ohio Replacement submarine details November 1, 2012.

Source:
http://www.navsea.navy.mil/HomePagePictures/Forms/DispForm.aspx?ID=131
http://news.usni.org/2012/11/01/ohio-class-replacement-details
« Last Edit: December 20, 2013, 09:31:50 pm by Triton »

Offline F-14D

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Re: Ohio Replacement Submarine
« Reply #1 on: December 20, 2013, 10:22:50 pm »
...and here's an artist's impression of UK's follow-on to the Vanguard SSBNs, to be devloped in parallel. 

Source:http://news.usni.org/2013/12/18/u-k-mod-releases-first-images-royal-navys-new-boomers

Offline Triton

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Re: Ohio Replacement Submarine
« Reply #2 on: December 21, 2013, 11:57:07 am »
Workers stand pose for a photo in the four-tube “quad-pack”. (U.S. Navy photo courtesy of General Dynamics Electric Boat/Released)

Source:
http://science.dodlive.mil/2012/10/10/the-next-generation-in-submarines/

Offline Triton

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« Last Edit: December 21, 2013, 12:41:02 pm by Triton »

Offline Brickmuppet

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Re: Ohio Replacement Submarine
« Reply #4 on: December 21, 2013, 12:44:56 pm »
What is the point of the "quad-pack"? In surface vessels it means four smaller missiles (like ESSM or the abortive POLAR) could be fitted in a standard launch tube. I thought perhaps they were looking at something a few inches shorter and narrower than the cancelled Midgetman for 64 non-MIRVed missiles. However, Triton's pic shows the quad pack consists of 4 full sized tubes...is this a swappable module or what?

Offline TomS

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Re: Ohio Replacement Submarine
« Reply #5 on: December 21, 2013, 01:10:28 pm »
Not swappable, exactly, but mass producable.  Building the missile compartment separately and then dropping it into the sub is a lot easier than building it in place.  Quad tubes because that fits both USN and RN plans. The RN replacement SSBN will have either 8 or 12 tubes (sources vary); the USN wants 16 tubes  By designing a 4-tube module, you can put 2 or 3 in the British boats and 4 in the US subs.

Offline NilsD

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Re: Ohio Replacement Submarine
« Reply #6 on: December 21, 2013, 04:24:54 pm »
Why is the replacement design significantly larger than Ohio while having only 2/3 the missile complement?

Offline Triton

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Re: Ohio Replacement Submarine
« Reply #7 on: December 21, 2013, 05:30:01 pm »

Offline Triton

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Re: Ohio Replacement Submarine
« Reply #8 on: December 21, 2013, 05:31:06 pm »

Online sferrin

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Re: Ohio Replacement Submarine
« Reply #9 on: December 21, 2013, 06:43:37 pm »
Why is the replacement design significantly larger than Ohio while having only 2/3 the missile complement?

Strange that way.  Supposedly the UK's Vanguard replacement will also be larger than it's predecessor.  Then there's the Russian Borei at 24,000 tons with 16 missiles.   
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Offline Rhinocrates

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Re: Ohio Replacement Submarine
« Reply #10 on: December 21, 2013, 08:00:26 pm »
Crew accommodations and facilities perhaps, which would help endurance?  The Astute class are the RN's first to dispense with hot bunking, which would increase volume - they are significantly larger than the Trafalgars.  The enormous Typhoons even have swimming pools.

Maybe some future-proofing...
« Last Edit: December 21, 2013, 08:02:08 pm by Rhinocrates »
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Offline TomS

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Re: Ohio Replacement Submarine
« Reply #11 on: December 21, 2013, 08:06:46 pm »
Electric drive can be bulky.  Also, many measures to improve quieting require volume inside the pressure hull.

As noted, improved crew accommodations also seem likely.

Offline markfward

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Re: Ohio Replacement Submarine
« Reply #12 on: December 21, 2013, 09:43:13 pm »
Not putting up with hot-bunks, accepting mixed sex crews, etc.


The New Navy costs money, don't you know.


Nothings' for free.




Offline RP1

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Re: Ohio Replacement Submarine
« Reply #13 on: December 22, 2013, 03:49:01 am »
Hi,


If I'm interpreting the "quad-pack" properly, it's to ease production issues - the integration of large diameter hull penetrations is always problematic and the missile tubes particularly. I think they used a lot of forged components but this new concept is supposed to make the structural integration a lot easier. [EDIT: Which TomS basically covered.]


Regarding hull size, remember that in the RN no small part of the growth from T- to A-boat was an increase in the diameter of the reactor compartment. Given what remained in the redacted documents released regarding successor it seems likely that PWR-3 will see a further increase in hull diameter to improve safety.


Of course, submarines have more that one dimension, so things like improved accommodation will increase volume, but sometimes that can be "filling in" space that has become available for other reasons. No matter how large they get, they're always the same density overall...


RP1


PS: IIRC Typhoon doesn't have a swimming pool, only a sauna. Roughing it in the Red Banner Northern Fleet! :D
« Last Edit: December 22, 2013, 03:54:38 am by RP1 »
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Offline RP1

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Re: Ohio Replacement Submarine
« Reply #14 on: December 22, 2013, 07:44:36 am »
My mistake:


I thought it was really a plunge pool for the sauna, though ;-) I'd never seem moving images of it, only stills.


RP1


PS: My word there is a *lot* of room on those boats.
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