Type 39B SSK (also termed as Type 41) with export designation of S20 is believed to be the Submarine

Discussion in 'Pakistan' started by WolfPack86, May 25, 2019.

  1. WolfPack86

    WolfPack86 Senior Member Senior Member

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    Type 39B SSK (also termed as Type 41) with export designation of S20 is believed to be the Submarine Pakistan Navy is acquiring from China in a multi billion dollar deal.
     
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  3. shiphone

    shiphone Senior Member Senior Member

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    1. no so called 'Typ041' ...

    2. the Thailand Navy S-26T is based on this Type039A(not the latest PLAN varient 039B )...around 2600 tons (surface)

    3. the Pakistan Navy chose the S-20 (scale down varient)...obviously the displacement is around 2000tons (surface)

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    Type039A/S26T

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    S26 vs S20

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    and the PLAN's 039B

    [​IMG]
     
    Last edited: May 25, 2019
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  4. WolfPack86

    WolfPack86 Senior Member Senior Member

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    5 billion dollars for 8 submarines how pakistan going pay for money these submarines. It's these submarines has vls and aip capabilities.
     
  5. shiphone

    shiphone Senior Member Senior Member

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    1.stirling engine AIP.
    2.no VLS,it's a just a 3000 tons(underwater) vessel..tube launched ASM

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    PLAN‘s 039B which is under massive construction at this stage. the 035G is almost gone, the next type leaving is the 035B.

    [​IMG]
    [​IMG]
     
    Last edited: May 26, 2019
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  6. Illusive

    Illusive Senior Member Senior Member

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    Sterling Cycle Engines

    A Sterling Engine is a closed cycle engine with a working fluid which is permanently containedin the system. A source of energy is used to heat this working fluid, which in turn moves the pistons and runs the engine. The engine is coupled to a generator, which generates electricity and charges the battery. The source of energy used here is typically LOX as oxidizer and diesel fuel, which is burnt in order to generate heat for the working fluid. The exhaust is then scrubbed and released into the seawater.



    [​IMG]
    Sterling AIP by Saab


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    A Sterling Engine (right) and the plugin module to be retrofitted on existing subs (left)
    The advantage of using Sterling engines is the easy availability of diesel fuel and low refueling costs when compared with Fuel Cells. They are also quieter than MESMA and hence preferred by the Japanese for their Soryu class, Sweden for their Gotland and Västergötland class and China for their Yuan class.

    The main drawback is that they are relatively noisy when compared to Fuel Cells due to the presence of a large number of moving parts. They are also bulky when compared to Fuel Cells. The operating depth of a submarine using Sterling AIP is limited to 200 m when AIP is engaged.
     
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