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Kalvari Class Submarines - Updates & Discussions

Discussion in 'Indian Navy' started by flanker143, Mar 15, 2011.

  1. Sahil ecclstone

    Sahil ecclstone FULL MEMBER

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    2020 :LMAO: ?? Seems optimistic. Maybe they can build all 6 by 2020 (HOPEFULLY) but will they all have finished trials?
     
  2. Ankit Kumar 001

    Ankit Kumar 001 Major Technical Analyst

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    The 3rd vessel will be launched by Oct-Dec this year. No 4 in 2018. And No5 and No6 in 2019.

    Its the first vessel usually which takes the longest time[for trials].

    After it, its just 3-4 months.
     
  3. Sahil ecclstone

    Sahil ecclstone FULL MEMBER

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  4. Som Thomas

    Som Thomas FULL MEMBER

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    India to Commission Advanced Attack Submarine This Month
    Franz-Stefan Gady
    [​IMG]
    The Indian Navy is slated to commission the lead boat of its new class of diesel-electric attack submarines in August, following almost four years of delay.

    The induction of the first Scorpene-class (Kalvari-class) diesel-electric attack submarine, INS Kalvari, will mark a significant milestone in India’s efforts to rebuild its depleted submarine force as China and Pakistan are building up their underwater warfare capabilities. As Chinese submarines in particular have stepped up patrols in the Indian Ocean, the Indian Navy’s fleet of diesel-electric subs currently consists of 13 aging boats in various states of operational readiness.

    The commissioning of the lead boat of the Indian Navy’s new attack submarine class in the next few weeks follows prolonged sea and weapons trials, including the test firing of a German SeaHake torpedo and the launch of a French-made Exocet SM39 anti-ship missile this year. The Exocet SM39 is a sea-skimming, subsonic, solid-fueled anti-ship missile with an approximate operational range of 50-70 kilometers depending on the variant.

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    However, the INS Kalvari is still without its primary weapon system against enemy subs and surface warships, given the cancellation of a contract for Black Shark heavyweight torpedos, built by Whitehead Alenia Systemi Subacquei (WASS), a subsidiary of Italian arms manufacturer Finmeccanica. The deal was called off due to corruption allegations.

    “The Black Shark torpedo was specifically purchased for the Indian Navy’s future fleet of six Scorpene-class (Kalvari-class) diesel-electric attack submarines,” I reportedelsewhere. “A second batch of 49 Black Shark torpedoes was also to be installed aboard India’s domestically developed and built Arihant-class of nuclear-powered ballistic missile submarines.” Alternatives to the Black Shark torpedo include the German-made SeaHake heavyweight torpedo and France’s F21 Artemis.

    The 1,550-ton Kalvari-class submarine is equipped with six 533-millimeter torpedo tubes for launching anti-ship torpedoes, anti-ship missiles, and sea mines. According to some reports, the Kalvari is currently not fitted with an air-independent propulsion (AIP) system. Navy officials, however, have stated that AIP could be added at a later stage during retrofit. In fact, it now appears that none of the six Kalvari-class subs will be commissioned with AIP.

    French shipbuilder Direction des Constructions Navales Services (DCNS) was awarded a $4.16 billion contract (known as Project 75-I) to build six diesel electric attack submarines for the Indian Navy in in cooperation with MDL in 2005. The initial Project 75-I contract also included the option of building six additional Scorpene-class submarines at MDL.

    However, the Indian Navy has recently issued a request-for-information to six foreign manufacturers for a new $8 billion contract to build six submarines with AIP technology, The Diplomat reported last month. The shortlist of manufacturers also includes DCNS; however, the company is unlikely to be selected following an embarrassing data leak (See: “India Drops Plans to Add 3 More French Stealth Attack Submarines”).

    The second Kalvari-class diesel-electric attack submarine, christened Khanderi, kicked off sea trials last month and is expected to be commissioned by the end of the year. The remaining four boats will all be delivered by 2020 at an interval of nine months.

    http://thediplomat.com/2017/08/india-to-commission-advanced-attack-submarine-this-month/
     
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  5. Gessler

    Gessler Mod MODERATOR

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    INS Kalvari back in her dock at MDL Mumbai...will enter service soon.

    [​IMG]
     
  6. X_Killer

    X_Killer Lieutenant FULL MEMBER

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    Indian Navy floats RFI for 150 heavyweight torpedoes

    [​IMG]
    The #Indian #Navy is issuing fresh ‘request for information’ (#RFI) to five international companies for 150 heavyweight torpedoes for submarines at a cost of $300 million. Sources told FE that the RFIs have been sent to #French company Naval Group (formerly known as #DCNS), #German ThyssenKrupp, Swedish #SAAB, Rosoboronexport (#Russia) and a #Japanese company.

    “Earlier, the original RFI for the heavy torpedoes was for 98, now the numbers are in bulk. The idea is to buy initial and the rest will be under ‘Make in India’ with an Indian partner,” said the source. These torpedoes are very important for the submarines and when India gets INS Kalvari, the first Scorpene class stealth submarine built under Project 75, later this year, it will be ‘without’ heavyweight torpedoes. This submarine is currently undergoing extensive sea trials.

    Work is expected to start on INS Khanderi, the second indigenous Scorpene-class submarine, which was recently launched at MDL. These are conventional diesel-electric subs made by DCNS (Naval Group) of France. Long delays in the Scorpene (project 75) at MDL, which was intended to induct the vessels at the rate on one ship per year since 2012, have left the submarine force well below the requisite levels.

    Early this year, the government cancelled its previous contract to buy 98 Black Shark heavyweight torpedoes from – Whitehead Alenia Systemi Subacquei (WASS) – a subsidiary of the Italian defence group Finmeccanica. It may be recalled that the group was blacklisted after it was alleged that another subsidiary of the company – #AgustaWestland – had paid bribes to secure a contract to sell 12 medium-lift helicopters to India.

    The foreign companies have to select their partners in India as the torpedoes are expected to be made here under the Strategic Partnership Model. The Modi-led NDA government is keen to reduce India’s dependence on foreign equipment manufactures. It has opened up defence manufacturing to Indian private sector. The SP route envisages that the Indian private companies will tie-up with foreign manufactures to get technology and in return the government will assure orders and allow exports as well.
     
    Last edited: Aug 22, 2017
  7. Sancho

    Sancho Lt. Colonel Technical Analyst

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    http://m.economictimes.com/news/def...-may-end-any-day-now/articleshow/60485766.cms
     
  8. Luttapi

    Luttapi 2nd Lieutant FULL MEMBER

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    What about the Shakti thermal torpedo which was undergoing development by NSTL. DRDO's Shakti submarine-launched thermal torpedo.jpg
     
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  9. Agent_47

    Agent_47 Admin - Blog Staff Member MODERATOR

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    It is not under development. Project was closed as TD.
     
  10. Luttapi

    Luttapi 2nd Lieutant FULL MEMBER

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    As per technology documents of DRDO it is showing as thermal propulsion technology has been developed and handed over for production.
    https://drdo.gov.in/drdo/pub/techfocus/oct2000/underwater.htm

    « Back
    Vol . 8 No. 5 & 6 October/December 2000

    Underwater Weapons Technologies

    The underwater weapons technology is multidimensional, encompassing almost all disciplines of engineering and science. Due to technology denial, the scientists face the most challenging task to develop every bit of technology indigenously for which infrastructural and industry backup are lacking. DRDO has been engaged in the development of torpedoes, sea mines, deep mobile target, decoy, fire control system; versatile acoustic target, and simulators. The technologies related to development of light-weight torpedo, wire-guided torpedo, processor-based mine and fire control system have been developed. Thermal propulsion technology, the most guARDEd technology with the developed countries for heavy weight and long range torpedoes, has been realised and will be Integrated with a weapon system soon. To meet the requirement of reduced self noise of torpedoes and to make them more stealthy, a pumpjet propulsion system has been developed and integrated with the torpedo. Many emerging technologies are under development to deliver the most advanced underwater weapons to the Navy. Certain critical technologies related to the development of torpedoes and mines are discussed here.

    Torpedoes

    Torpedo is the most dynamic and lethal underwater weapon. Design of this sophisticated
    [​IMG]
    and complex system calls for technologies relating to mechanical engineering, propulsion, power source, electronics, signal processing, control and guidance, hydrodynamic study, aerodynamic study, suspension and release devices, computer and software, explosive, exploder mechanism, etc. Torpedo, being a fire and forget type of weapon, comprises an intelligent homing system which has to perform an optimum search, detect target amongst decoys and eventually guide the weapon on to the target to hit it for exploding the explosive onboard. The shells and mechanical components used in the torpedo are required to be of very high weight-to-strength ratio to enable it to withstand the ambient pressure as well the launch impact at the same time without adding to its weight. It requires very light-weight high-power batteries, motors, homing device, actuators and control devices. Different types of shells, including composites for different torpedoes, sea water activated batteries for electric propulsion, contrarotating motor, propellers, homing head with PZT sensors, electronic . system onboard computers signal processing unit and actuation system have been developed. The first ever indigenously developed anti-submarine light-weight torpedo of air/ship launch version has completed user evaluation and cleared for limited series production. This weapon also contains the first ever homing system to be developed by [3RDO. All sub-systems for the torpedoes have been developed indigenously. Some such important sub-systems are discussed here.

    Electrical Propulsion

    Sea water activated Mg-AgO primary batteries for light-weight torpedoes and Ag-Zn
    [​IMG]
    secondary batteries for heavy-weight torpedoes have been developed in collaboration with High Energy Batteries Ltd., Tiruchirapalli. Contra-rotating motors have been developed using rare earth permanent magnets to achieve high degree of efficiency within a. smaller volume. Contra-rotating propellers have been developed to facilitate high-speed, low-noise, cavitation-free and roll-balanced performance for torpedo.

    Control & Guidance

    A digital control technology has been developed to achieve high degree of accuracy in torpedo control and guidance. It involves development of precision sensor, an onboard computer based on 80486 processor, and high torque and light-weight controllers.

    Homing System

    The accuracy and hit probability of any guided underwater weapon depends on its homing capability. Such a system incorporating the latest signal processing techniques, such as constant false alarm rate algorithms, signal adaptive filtering, etc. to counter the reverberation, multipath acoustic propagation, and acoustic countermeasures has been developed. Detection algorithm, post-detection processing techniques and mission requirement are all software-controllable. Low-noise, high-efficiency, compact underwater electroacoustic transducers have been used for the homing system.

    Torpedo Propulsion Systems

    For increasing the speed of torpedoes, a thermal propulsion system will be required.
    [​IMG]
    DRDO is engaged in active research in this area and has made a few significant achievements. Fuel and oxidiser have been synthesized and technology transferred for bulk production. An external servo-controlled swash plate fuel pump and air impulse turbine with transmission systems have been developed.

    Pumpjet Propulsion

    Contra-rotating propellers are unable to generate high speed due to cavitation at speeds exceeding 45 knots. A pumpjet propulsor has been developed successfully in collaboration with Indian Institute of Science, Bangalore, and Turbo Tech, Precision Engg. Comp., Bangalore. The pumpjet propulsor has been tested to develop more power and low-noise performance.

    Decoys & Targets

    The submarine under the threat of an attack from a torpedo uses several evasive methods
    [​IMG]
    to get away from the attack. One such evasive method is to fire an expendable decoy which is an electronic and acoustic countermeasure against the active-passive torpedo. Decoys have been developed that are housed in a small FRP shell and use lithium-sulphide batteries. These decoys can be ejected through a cartridge. The acoustic system with transducers creates acoustic noise mimicking that of a submarine and decoys the attacking torpedo. The buoyancy of the decoy is critically controlled for slow descent rate. Signal design is implemented to decoy either passive or active homing system. Targets, mobile and static, are generally needed for training the sonar operators and ASW crew in practising torpedo firings. The targets imitate and simulate the submarine acoustically. The targets generate broadband frequencies from very low to high frequencies. Several target parameters can be set to include target strength, pulse-length, Doppler shift, and raDIATed nose level. A static target called versatile acoustic target (VAT) has been developed and extensively used in the evaluation of torpedoes and mobile target called programmable deep mobile target (PDMT).

    Mines

    Mines continue to be a cost-effective deterrent in naval warfare. These have become more and more intelligent since World War II types of contact and magnetic mines. State-of-the-art sea mines have been developed that work on the influence of anyone or a combination of magnetic, acoustic and pressure signals. The pressure transducer used in the mine has also been developed indigenously. Three types of mines, processor-based ground mine, moored mine, and processor-based exercise mine developed by DRDO have been accepted for production after extensive trials by the Navy. The processor-based ground mine is already under production at KELTRON.

    Tripple Tube Launcher

    A tripple tube torpedo launcher has been developed and is in use onboard naval ships. Three torpedoes can be loaded and launched from this tube.

    [​IMG]
    [​IMG]

    Fire Control System

    The target parameters measured by a sensor are used to compute the weapon data in the fire control system. A fire control system has been developed to provide complete solution based only on bearing information. The system can track multiple targets and identify six priority threats. It can also generate information on iDEAL manoeuvering of the platform in a particular combat scenario. Contact motion analysis algorithm using square residual innovation process and statistical hypothesis using implemented to declare the manoeuver of the target.
     
    Last edited by a moderator: Sep 14, 2017
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  11. Agent_47

    Agent_47 Admin - Blog Staff Member MODERATOR

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  12. Blackjay

    Blackjay Developers Guild Developers -IT and R&D

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    Scorpene submarines to get Indian AIP modules
    [​IMG]
    Dinakar Peri
    NEW DELHI,SEPTEMBER 16, 2017 21:41 IST
    UPDATED: SEPTEMBER 16, 2017 21:41 IST

    DRDO’s development of the indigenous system has been delayed
    Even as the Navy gets ready to induct its first conventional submarine in almost two decades, sources have confirmed that a decision has been reached on an expensive and time consuming process to install Air Independent Propulsion (AIP) modules on the six new Scorpene submarines to be inducted over the next few years.

    However, it is contingent on the indigenous AIP module being fully ready by then.

    “All six Scorpenes will get an Indian AIP. It will be installed by the Original Equipment Manufacturer, Naval Group,” a Navy source confirmed.

    An AIP module is under development by the Defence Research and Development Organisation (DRDO). It was supposed to have been installed on the last two submarines before they rolled out of the production line. However, the module did not materialise due to delays in development.

    As reported by The Hindu earlier, Naval Group, formerly the DCNS — a defence company based in France — proposed this option after attempts to install the domestic system on the last two submarines failed.

    AIP modules give stealth and extended endurance to diesel-electric submarines by allowing them to stay submerged longer.

    However, it would be a costly process as the hull of the submarine has to be opened up to integrate the AIP module and then sealed before being put through the entire range of tests and trials to validate its performance.

    The first Scorpene submarine Kulvarihas completed all trials and is ready for induction either by this month-end or early next month. It would go for a normal refit after six years, in 2023.

    Link-
    http://www.thehindu.com/news/nation...to-get-indian-aip-modules/article19700162.ece
     
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  13. lca-fan

    lca-fan Major SENIOR MEMBER

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    All Six Scorpene Submarines to get Indian AIP modules
    Sunday, September 17, 2017 By: The Hindu Source Link: CLICK HERE


    [​IMG]



    Even as the Navy gets ready to induct its first conventional submarine in almost two decades, sources have confirmed that a decision has been reached on an expensive and time consuming process to install Air Independent Propulsion (AIP) modules on the six new Scorpene submarines to be inducted over the next few years.

    However, it is contingent on the indigenous AIP module being fully ready by then.

    “All six Scorpenes will get an Indian AIP. It will be installed by the Original Equipment Manufacturer, Naval Group,” a Navy source confirmed.

    An AIP module is under development by the Defence Research and Development Organisation (DRDO). It was supposed to have been installed on the last two submarines before they rolled out of the production line. However, the module did not materialise due to delays in development.

    As reported by The Hindu earlier, Naval Group, formerly the DCNS — a defence company based in France — proposed this option after attempts to install the domestic system on the last two submarines failed.

    AIP modules give stealth and extended endurance to diesel-electric submarines by allowing them to stay submerged longer.

    However, it would be a costly process as the hull of the submarine has to be opened up to integrate the AIP module and then sealed before being put through the entire range of tests and trials to validate its performance.

    The first Scorpene submarine Kulvari has completed all trials and is ready for induction either by this month-end or early next month. It would go for a normal refit after six years, in 2023.

    The DRDO has assured that the system will be fully ready by then for integration, the source added.

    The second submarine Khanderi has begun trials, and is likely to be inducted early next year
    http://www.defencenews.in/article/All-Six-Scorpene-Submarines-to-get-Indian-AIP-modules-323700
     
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  14. Angel Eyes

    Angel Eyes 2nd Lieutant FULL MEMBER

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    Excellent news.....AIPs are must in modern submarines..
     
  15. Agent_47

    Agent_47 Admin - Blog Staff Member MODERATOR

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