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L&T’s home-grown technology aims to raise stealth submarine capability: Jayant Patil

Discussion in 'Indian Navy' started by lca-fan, Jun 17, 2017.

  1. lca-fan

    lca-fan Major SENIOR MEMBER

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    L&T’S HOME-GROWN TECHNOLOGY AIMS TO RAISE STEALTH SUBMARINE CAPABILITY: JAYANT PATIL
    SATURDAY, JUNE 17, 2017 BY INDIANDEFENSE NEWS

    [​IMG]

    by Amrita Nair-Ghaswalla

    The Indian Navy intends to acquire the next set of conventionally powered six diesel-electric submarines under Project-75I, a follow-on of Project 75 Kalvari-class submarines. Larsen and Toubro (L&T) and another private shipyard Reliance Defence turned out trumps, beating three public sector shipyards to become eligible to participate in the P-75I programme. Business Line caught up with Jayant Patil, Head of Defence and Aerospace, and Member of Shipbuilding and Heavy Engineering Board at L&T, to understand how the Indian shipyard is set to take the lead in responding to the tender, effectively ending the 70-year public sector monopoly. Patil also enumerated on the company's quest for greater submerged endurance with the crucial Air Independent Propulsion (AIP) system, a home-grown technology and an enormous challenge for Indian companies, which is aimed at increasing endurance and stealth capability of the submarine. Excerpts:

    Has the request for proposal (RFP) been announced as yet? Can you explain the process?

    No, we await receipt of the RFP for P75I. Having approved the Strategic Partner (SP) policy, the defence ministry (MoD) will first issue an expression of interest (EoI) to probable companies and evaluate eligible private sector Indian yards for construction of the P75I submarines. This will be done by a MoD-appointed specialist committee that will short-list yards that meet the Strategic Partnership criterion, leading to selection of Potential SP. Concurrently, the MoD willl evaluate foreign OEMs through a EoI process and short-list those complying with the requirements of P75I.

    Could you give us an idea about L&T's capabilities in stealth submarines.

    Larsen & Toubro has been associated with India’s strategic submarine programme for decades. It was formally announced when INS Arihant was launched in 2009. Our work centres specialise in the construction of submarine hulls with an entire range of in-house developed capabilities that are key to the submarine construction value chain - from detailed design and engineering in digital domain to hull construction using IT-enabled automation.

    We have also developed technologies and matured them to do 3D-assisted outfitting, system integration, to system level qualification tests and trials as proven on classified underwater programmes. These have been developed indigenously given the nature of the programmes and the National endeavour we have been associated with.

    How is the company placed with regard to other Indian competitors in facilitating the P75I contract?

    L&T is the only shipyard in India which has a track record in the construction and integration of the most critical and complex bow, aft and other pressure tight structures, which needs to be imported by other yards. Our indigenous knowledge and technologies are amply proven across underwater programs.

    L&T is also the System Integrator for DRDO’s Air Independent Propulsion (AIP) system programme. L&T also has a track record in the development of significant platform specific systems such as propulsion systems, engineering systems, control systems and weapon systems for Naval underwater programs. These capabilities places L&T in a unique position.

    Does the company have the wherewithal to undertake and help with the AIP-related technology for the submarines, which is a major prerequisite of this tender?

    L&T is currently partnering with the DRDO as Lead System Integrator for the indigenous development of the fuel cell based AIP system. This is engineered as a modular package that can be plugged into a platform of choice. This technological solution holds promise to be among the latest and safest evolution in propulsion technology for conventional submarines for enhanced indiscretion rates.

    (The indiscretion rate refers to the percentage of time a submarine spends when it comes up for air, which also makes it the time when it is the most vulnerable)

    It enhances the endurance of conventional diesel-electric submarines to remain underwater many-folds, thus converting it into a more potent weapon platform with higher indiscretion rate.

    Source>>

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  2. lca-fan

    lca-fan Major SENIOR MEMBER

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    Is he hinting that L&T is capable of building completely INDIAN submarine for P75I program? If so, then it's a HUGE development. Just Imagine a completely INDIAN submarine without any collaboration, with completely INDIAN AIP.

    GOOD BYE DCNS & SCORPENES.
     
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  3. Sancho

    Sancho Lt. Colonel Technical Analyst

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    He is talking about the DRDO AIP and since the tender is under the SPM, a foreign sub is the Base anyway.
     
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  4. Agent_47

    Agent_47 Admin - Blog Staff Member MODERATOR

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    Building not designing from scratch. They were a major partner for SSBN program.
     
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  5. Hellfire

    Hellfire Devil's Advocate Staff Member MODERATOR

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    They have the necessary know how. The CSL along with MDL was up in arms over this particular aspect as they did not want the L&T Conglomerate to be allowed to build subs at their sites. They have, reportedly, capability to build 6 subs simultaneously.

    As @Agent_47 did point out, they are partners in both SSBN and SSN projects.
     
  6. Guynextdoor

    Guynextdoor BANNED BANNED

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    why not dude? Everyone knows that majority of the Nuclear Submarines are being built by them. This is how you build indigenous capacity- by using the private sector.
     
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  7. Guynextdoor

    Guynextdoor BANNED BANNED

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    DPSUs are #$$%. Most of their stuff is joint venture with foreign companies (like Tatra trucks) but they have problems letting Indian companies getting contracts.
     
    Last edited by a moderator: Jun 17, 2017
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  8. lca-fan

    lca-fan Major SENIOR MEMBER

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    If they can design SSBN & SSN from scratch then conventional submarine will be a cake walk. Arihant was manufactured by L&T, so capability exists. It is Corrupt Congress Govt (for want of kick backs) which had tied the hands of L&T otherwise they could have easily come up with conventional sub long before.
     
  9. Agent_47

    Agent_47 Admin - Blog Staff Member MODERATOR

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    They did not design SSBN but Naval Design Bureau (NDB) did.
     
  10. Hellfire

    Hellfire Devil's Advocate Staff Member MODERATOR

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    Incorrect. It is every government till date. Stop blaming the Congress exclusively. Look at the CSL threats of proceeding on strikes and now Air India is threatening strikes if divestment takes place.

    Where else would you get paid not to work if not the Public Sector Units? With present plans on increasing divestments, these threats are coming fast and furious. But even BJP will back down, this is too big a vote bank to touch. Recall that Vajpayee extended the reservations, whereas it was unconstitutional and unwarranted, SC/ST get reservations in even Post Graduate vacancies and even as 3rd generation (example Tina Tabi)!!! What the hell is that?

    Hard decisions are needed if the economy and the nation has to progress and transform, but who will take it? Whosoever takes it, will lose votes. Everyone has a crib.
     
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  11. lca-fan

    lca-fan Major SENIOR MEMBER

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    If we have in-house capabilities, then why buy imported subs, which comes at higher cost. Even if Naval Design Bureau designs this sub and DRDO provides AIP it will still be better. We will have Submarine which we can call it our own. And if L&T can assemble 6 submarines at a time like @Hellfire stated these will come really fast, which could help Navy's Sub-Surface capabilities which is in Dire Strait.
     
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  12. Sancho

    Sancho Lt. Colonel Technical Analyst

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    Design and manufacture are different things, not to forget that our nuclear subs are largely build on Russian know how.
    But L&T certainly should put more effort into the naval design research, to give us a fully indigenous option beyond P75I.
    At the end of the day however, being Indian alone doesn't cut it. The product must fulfil IN's operational requirements and be competitive to similar counterparts in the market. We are not talking about Indian cars or trucks, but keys to protect the country. Thankfully, the indigenous naval industry is the most promising, next to the helicopter sector.
     
    Last edited: Jun 17, 2017
  13. Guynextdoor

    Guynextdoor BANNED BANNED

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    No, but I think since several critical technologies have been mastered- metallurgy, AIP etc. a human livable submarine design etc., I think it is very good time to start work on indigenous subs. Germany doesn't make any nuke subs but they ace conventional subs- this shows that our technical abilities which are arguably ahead of them now should let us go it alone on this.
     
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  14. GSLV Mk III

    GSLV Mk III Captain FULL MEMBER

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    SSBNs and SSNs aren't exactly available in the market & the best way is to go is the route we followed for our BMs, that is through incremental improvements.
     
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  15. GSLV Mk III

    GSLV Mk III Captain FULL MEMBER

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    Isn't it better to use this capacity for building SSNs ?
     
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