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Author Topic: NSSN Virginia-class - current status and future  (Read 69888 times)

Offline Moose

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Re: NSSN Virginia-class - current status and future
« Reply #180 on: June 15, 2018, 05:29:59 pm »
I believe a new-build SSGN that's a straight adaption of Columbia class (retaining 16-ish payload tubes) is ultimately unlikely. But a more affordable SSN/SSGN making use of Columbia tooling and hardware where practical while being considerably smaller overall seems like it has a good chance.

The whole point would be to take advantage of the greater diameter (enabling longer missiles).  Maybe make it shorter.  8 tubes instead of 16 but how much would doing that actually save once you add in all the additional NRE?
Probably a $billion without sweating.
I believe a new-build SSGN that's a straight adaption of Columbia class (retaining 16-ish payload tubes) is ultimately unlikely. But a more affordable SSN/SSGN making use of Columbia tooling and hardware where practical while being considerably smaller overall seems like it has a good chance.

The whole point would be to take advantage of the greater diameter (enabling longer missiles).  Maybe make it shorter.  8 tubes instead of 16 but how much would doing that actually save once you add in all the additional NRE?

There was also an argument for a faster transiting SSGN which translates to about a 300 ft length for a 43 ft beam.
Oh yes indeed. Waste not the ability to roll those 43' barrel sections.
« Last Edit: June 15, 2018, 05:37:45 pm by Moose »

Offline NeilChapman

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Re: NSSN Virginia-class - current status and future
« Reply #181 on: July 13, 2018, 03:20:55 am »
I believe a new-build SSGN that's a straight adaption of Columbia class (retaining 16-ish payload tubes) is ultimately unlikely. But a more affordable SSN/SSGN making use of Columbia tooling and hardware where practical while being considerably smaller overall seems like it has a good chance.

But that's not the bureaucratic way.  In government speak, 'why build one when you can build two at twice the price?'

By then, Columbia will be more affordable.  Production will be in full swing.  Incremental improvements in efficiency will result in considerable man-hour reductions.  Look at the efficiencies in the Virginia build.

Hasn't the line between the requirements for each class blurred as the mission requirements have changed? Attack boats need a larger diameter to accommodate more flexibility in munitions.  Boomers need to be faster while being even quieter than before. If both the strategic and the tactical missions can be accomplished with one boat then it might make sense to build one boat. 

It seems more likely that Columbia tech will be late and some reduction in capability will result. I could see more boats built so later 'blocks' could receive upgrades.  The Navy also wants a particular quantity of boats in general.  If funding isn't available to meet the quantity required then I could also see Virginia Block VIII. 

Offline bobbymike

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Re: NSSN Virginia-class - current status and future
« Reply #182 on: July 26, 2018, 08:55:31 pm »
https://news.usni.org/2018/07/25/35314

Quote
The first Columbia-class submarine is more than a decade away from joining the fleet and General Dynamics is preparing its Electric Boat business and the Wall Street analysts watching the company for what the almost $100 billion project means to its operations.

During the quarter, the U.S. Navy awarded General Dynamics $225 million for Block V Virginia-class submarine long-lead materials, and $100 million for advanced nuclear plant studies in support of the Columbia-class submarine project. Later this year, General Dynamics expects to finalize the Block V contract with the Navy, Phebe Novakovic, chief executive, told analysts during a conference call Wednesday morning.

Overall, these awards, steady work at the shipyards and good performance by other General Dynamics business lines helped the company report strong financial results for the three months ending July 1. Revenues were $9.2 billion, compared to revenues of $7.7 billion for the same period a year ago, according to the General Dynamics earnings report. Profits for the quarter were $786 million, an increase from the $749 million reported a year ago.
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Offline NeilChapman

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Re: NSSN Virginia-class - current status and future
« Reply #183 on: August 09, 2018, 06:30:36 pm »
https://news.usni.org/2018/08/08/35632

"General Dynamics Electric Boat and the Navy are evaluating the potential of missile tube welding issues identified by a subcontractor to delay construction of the first Columbia-class submarines, the next block of Virginia-class submarines and for the British Dreadnought-class submarines."


**  Edit: Fixed problem link  **
« Last Edit: August 10, 2018, 05:53:40 am by NeilChapman »