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    Project 971: Akula class

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    Viktor
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    Re: Project 971: Akula class

    Post  Viktor on Thu Jun 12, 2014 1:47 pm

    K-295 Samara Akula-2 and K-391 Bratsk Akula-2 off to extensive modernization  thumbsup 

    Submarine "Bratsk" and "New" will be a complete redesign of the shipyard in Severodvinsk
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    Re: Project 971: Akula class

    Post  Mike E on Wed Aug 20, 2014 8:12 pm

    Russia to upgrade 2 Pacific Fleet nuclear submarines


    ARKHANGELSK, August 20. /ITAR-TASS/. Two multi-purpose Project 971 nuclear submarines Samara and Bratsk of the Russian Pacific Fleet will be delivered to the city of Severodvinsk, a nuclear shipbuilding center in Russia’s northern Arkhangelsk region. They will be upgraded at the Zvezdochka military shipyard, the military shipyard’s press service told ITAR-TASS on Wednesday.
    A dock-ship will deliver nuclear submarines from the Far-Eastern port of Petropavlovsk-Kamchatsky on the Northern Sea Route.
     

    - Looks like they are finally starting!
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    Re: Project 971: Akula class

    Post  GarryB on Thu Aug 21, 2014 9:16 am

    It makes a lot of sense to upgrade Pike subs... they should have years of service yet and the replacement of all the electronics and systems means all the important components will be up to date and modern.

    Fitted with the new Sigma communications and battle management system means it will be able to communicate with other vessels in the Russian fleet and share data.

    It would be a bit like an Su-35 or MiG-35... not as good as a PAK FA in some areas (ie stealth and raw performance with low drag and high engine power to weight ration) but better in other areas (ie weapon capacity and low cost and numbers ).


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    Re: Project 971: Akula class

    Post  Mike E on Thu Aug 21, 2014 6:31 pm

    True, and as I always say "it is good to build new, but it is better to build the new and upgrade the old."
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    Re: Project 971: Akula class

    Post  GarryB on Fri Aug 22, 2014 12:08 pm

    Less waste and usually faster too.

    It also means you have a mixed fleet but at least the vessels in that fleet old and new have the same standard equipment and comms systems/weapons etc. Eases training without having to get the new boats into service in numbers quickly.


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    Re: Project 971: Akula class

    Post  Mike E on Fri Aug 22, 2014 7:08 pm

    Exactly! 

    Besides, these 971 Akulas (especially the improved ones) still have a good 15-25 years left in them if they are properly maintained... By then all Yasens should've been made, and that allows them to begin decommissioning the 971s.
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    Re: Project 971: Akula class

    Post  navyfield on Sun Aug 24, 2014 10:06 pm

    im not so sure,project 971 seem to show allot of noise creeping up due to old age, but better than nothing.
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    Re: Project 971: Akula class

    Post  Mike E on Sun Aug 24, 2014 11:44 pm

    How do you know that? Subs don't get "louder" unless they are degraded (for export) or completely unmaintained...
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    Re: Project 971: Akula class

    Post  navyfield on Sun Aug 24, 2014 11:51 pm

    Actually subs do get louder over time ,tiles falling off ,equipment degrading ,cavitation damaging propeller that must be replaced after a while and then actively ballanced...etc...
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    Re: Project 971: Akula class

    Post  Mike E on Mon Aug 25, 2014 12:12 am

    - Hence the reason I said "completely unmaintained"...
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    Re: Project 971: Akula class

    Post  GarryB on Tue Aug 26, 2014 6:58 am

    Over time pumps and motors get more noisy... but considering they are completely rebuilding these subs they will likely end up quieter and electronically more capable than they have ever been before... which would make them excellent boats for any Navy.


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    Re: Project 971: Akula class

    Post  Mike E on Wed Aug 27, 2014 12:25 am

    Exactly... Yes, they do get louder, but good maintenance and upgrades fix that.
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    Re: Project 971: Akula class

    Post  Mike E on Mon Sep 01, 2014 9:06 am

    I hate to ask, but don't the Akulas have a "silent mode" where reactor pumps are shut down and electric motors power it?

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    Re: Project 971: Akula class

    Post  Austin on Mon Sep 01, 2014 9:22 am

    Mike E wrote:I hate to ask, but don't the Akulas have a "silent mode" where reactor pumps are shut down and electric motors power it?

    Yes , The pump can be shut down and they use natural circulation of water for coolent.

    Akulas do have batteries with them and dont just rely on N power but its speed will be very low in few knots but very silent.
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    Re: Project 971: Akula class

    Post  Mike E on Mon Sep 01, 2014 9:33 am

    Thank you very much!
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    Re: Project 971: Akula class

    Post  George1 on Sun Sep 14, 2014 4:04 am

    K-391 Bratsk and K-295 Samara going to modernization



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    Re: Project 971: Akula class

    Post  Mike E on Sun Sep 14, 2014 5:56 am

    Good... Does anybody know how long the modernization process will take?
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    Re: Project 971: Akula class

    Post  Stealthflanker on Sun Sep 14, 2014 9:16 am

    Mike E wrote:Good... Does anybody know how long the modernization process will take?

    Years, as this may involve opening the pressure hull, refuel the reactor and balancing machineries.
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    Re: Project 971: Akula class

    Post  Mike E on Sun Sep 14, 2014 7:01 pm

    Stealthflanker wrote:
    Mike E wrote:Good... Does anybody know how long the modernization process will take?

    Years, as this may involve opening the pressure hull, refuel the reactor and balancing machineries.
    Figured... It will be worth it in the long run though!
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    Re: Project 971: Akula class

    Post  Stealthflanker on Mon Sep 15, 2014 5:17 am

    Mike E wrote:
    Figured... It will be worth it in the long run though!

    Let's wish for stable economy during those overhaul years.
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    Re: Project 971: Akula class

    Post  Mike E on Mon Sep 15, 2014 5:30 am

    Stealthflanker wrote:
    Mike E wrote:
    Figured... It will be worth it in the long run though!

    Let's wish for stable economy during those overhaul years.
    Yeah, it *should* strengthen in the long term...
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    Re: Project 971: Akula class

    Post  navyfield on Sun Sep 21, 2014 8:54 pm

    GarryB wrote:Rolling Eyes  So all nuclear power plants used by all countries in submarines are the same?

    I used to think you liked to play dumb... beginning to think you are not playing...
    today very simmilar...
    i beat you so no need to make a fuss....
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    Re: Project 971: Akula class

    Post  GarryB on Tue Sep 23, 2014 9:18 am

    All naval reactors are the same?

    I am sure all those crews on the HEN subs will be relieved to know they were not under any real danger because the reactors on their subs were actually as safe as western subs.

    The Hotel, Echo, and November class had very early very untested reactors that were put into service when there was no alternative.

    But you are the expert right.


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    Re: Project 971: Akula class

    Post  2SPOOKY4U on Wed Nov 05, 2014 4:36 am


    High speed maneuvering flaps

    Sonar Array

    Water intake for quiet cooling

    Silent running electric motor

    SOKS sensor on sail

    SOKS sensor on hull?
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    Re: Project 971: Akula class

    Post  George1 on Tue Jan 13, 2015 2:51 pm

    Full report from the modernization of aculas with pics and captions

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    Re: Project 971: Akula class

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