Indian nuclear submarines

[right wing]

l&t in hazira makes the hull as of now.but in future we may see this operation shifting closer to kukatpally (pardon me if the spelling is wrong),in tamil nadu,near chennai.

 

[kurup]

l&t in hazira makes the hull as of now.but in future we may see this operation shifting closer to kukatpally (pardon me if the spelling is wrong),in tamil nadu,near chennai.

It's Kattupalli .

 

[Kunal Biswas]

Soon from Arihant ..

 

[Bheeshma]

Thats Brahmos. I want to see K4 and K15 from Arihant.

 

[AVERAGE INDIAN]

H I Sutton - Secret Shores

H I Sutton - Secret Shores

 

[Bheeshma]

Speculative BS...

 

[Pulkit]

@Kunal Biswas ....


What are the advantages of single hull over double hull Sub? if any?
Which one is better for us? and why?

 

[SilentKiller]

@Kunal Biswas ....


What are the advantages of single hull over double hull Sub? if any?
Which one is better for us? and why?

Double Hull are difficult to be sunk than single Hull, can be more quieter and carry more payload
But Double Hull face difficulty to submerge, heavy and can have range or drag issue.

 

[AVERAGE INDIAN]

Double-hulled subs have advantages over their single-hulled counterparts:
Survivability - Multiple direct torpedo hits, depending on the sub's size, are required to sink it.

Silence - With the latest noise nullifying technology available, double-hulled subs can emit less noise.

Strength and increased crush depth - With a double-hulled sub built of HY-100+ grade steel-alloy and/or titanium, it can withstand tremendous pressure at depths greater than 500 meters (1640 feet), in some cases up to 1200 meters (4000 feet experimental mini subs).

Buoyancy - A double hulled sub floats on the surface like a cruise ship, whereas a single-hulled sub waddles around like flotsam.

That's just what I think about the advantages of double-hulled subs.

Inside the outer hull there is a strong hull, or pressure hull or single hull, which actually withstands the outside pressure and has normal atmospheric pressure inside. The pressure hull or single is generally constructed of thick high-strength steel with a complex structure and high strength reserve, and is separated with watertight bulkheads into several compartments. The pressure and light hulls aren't separated, and form a three-dimensional structure with increased strength. The interhull space is used for some of the equipment which doesn't require constant pressure to operate. The list significantly differs between submarines, and generally includes different water/air tanks. In case of a single-hull submarine, the light hull and the pressure hull are the same except for the bow and stern.

The constructions of a pressure hull requires a high degree of precision. This is true irrespective of its size. Even a one inch (25 mm) deviation from cross-sectional roundness results in over 30 percent decrease of hydrostatic load. Minor deviations are resisted by the stiffener rings, and the total pressure force of several million longitudinally-oriented tons must be distributed evenly over the hull by using a hull with circular cross section. This design is the most resistant to compressive stress and without it no material could resist water pressure at submarine depths. A submarine hull requires expensive transversal construction, with stiffener rings located more frequently than the longitudinals. No hull parts may contain defects, and all welded joints are checked several times with different methods.

 

[Kunal Biswas]

Single Hull AIP equipped Submarines, Small stealthy and long range able to operate in littoral waters ( Andaman Sea and Arabian Sea ) Such submarine can built faster than double hull counterparts ..

Double hull Submarines are best suited to operate in Indian ocean and beyond ..

Which one is better for us? and why?

 

[Anony86]

It's media bias that Arihant would be able to carry only four K-4 missile. Indian Navy has never release any specs of INS Arihant. From the pic, I can easily say that this submarine looks much more bigger and heavier than 6000 tonne. It looks like 9000 tonne fish. I am hoping it to carry atleast 8 K-4 missile or 4 K-4 and 12 K-15 missiles.

 

[Kyubi]

Any reference to support your claim mate !!!!!!

 

[Anony86]

Any reference to support your claim mate !!!!!!

Dude I am not making any claim. I am just saying that official specs of Arihant was never released & what we know is a speculation and word of mouth from unknown sources.

 

[Pulkit]

Just read an article stating China shud build more single hull subs....
....
In the scenario of them trying to operate them in Indian Ocean will it or will it not disastrous for them?

Single Hull AIP equipped Submarines, Small stealthy and long range able to operate in littoral waters ( Andaman Sea and Arabian Sea ) Such submarine can built faster than double hull counterparts ..

Double hull Submarines are best suited to operate in Indian ocean and beyond ..

 

[Bheeshma]

Chinese subs are stuck in south china sea which is very shallow. They copied russians and hence have double hull. Single hull is enough for SCS .

 

[Dhairya Yadav]

any news about when BM tests are scheduled for Arihant?

 

[Free Karma]

Indigenous n-sub's sea trials by year-end | Business Standard News

n a major boost to indigenisation of defence manufacturing, India's first nuclear-powered and nuclear-armed submarine INS Arihant will head out for sea trials by the year-end.

"INS Arihant will be ready for sea trials by the end of this year," an official aware of the developments relating to the 6,000-tonne submarine told IANS, speaking on condition of anonymity.

Once the trials are through and the submarine enters service, India will not only complete its nuclear triad of delivering nuclear weapons from land, sea and air, but also join an elite club of six nations that operate nuclear submarines carrying ballistic missiles. The US, Russia, France, Britain and China are the other nations with this capability.

The INS Arihant's miniaturised nuclear reactor, built with Russian help, had gone critical last year and the vessel has been going through a series of harbour trials since then at Visakhapatnam, where it is being built.

The submarine has also been going through the power-up cycle of its nuclear reactor and has now achieved a nearly 100 percent power level, the official said.

"Its reactor had gone critical last year. We are now close to attaining 100 percent its power," the official said, adding: "The nuclear reaction is highly controlled. It is something similar to nuclear power plants, but extra caution is needed. The reactor is now functioning perfectly well," the official said.

Once the submarine attains 100 percent power, it will head out to sea for its final trials, which will include the firing of the indigenous Bo5 missile that has a 700-km range and can carry a one tonne nuclear warhead. INS Arihant can carry 12 such missiles.

The vessel, the lead ship of the Arihant-class submarines, was launched in 2009. Its design is based on the Russian Akula-1 class submarines and its 83MW pressurised heavy water reactor has been built with significant Russian assistance.

While its 100-member crew has been trained by Russian specialists, Indian scientists at Mumbai's Bhabha Atomic Research Centre have received significant expertise in reducing the size of the reactor to help it fit into the 10 metre diameter hull of the submarine.

The Indian Navy currently operates the INS Chakra nuclear-powered submarine leased for 10 years from Russia in 2012.

Nuclear submarines stay out at sea for longer periods than diesel-electric powered boats and can also remain under water for longer durations. Conventional submarines have to surface at regular intervals for re-charging their batteries, making them vulnerable to detection.

Two other vessels of the Arihant class are also believed to be under construction at Visakhapatnam's state-owned Hindustan Shipyard Limited.

 

[sayareakd]

^^^ great news......

 

[Lions Of Punjab]

Indigenous nuclear-armed submarine INS Arihant's sea trials by year-end - The Economic Times


NEW DELHI: In a major boost to indigenisation of defence manufacturing, India's first nuclear-powered and nuclear-armed submarine INS Arihant will head out for sea trials by the year-end.

"INS Arihant will be ready for sea trials by the end of this year," an official aware of the developments relating to the 6,000-tonne submarine told IANS, speaking on condition of anonymity.

Once the trials are through and the submarine enters service, India will not only complete its nuclear triad of delivering nuclear weapons from land, sea and air, but also join an elite club of six nations that operate nuclear submarines carrying ballistic missiles. The US, Russia, France, Britain and China are the other nations with this capability.

The INS Arihant's miniaturised nuclear reactor, built with Russian help, had gone critical last year and the vessel has been going through a series of harbour trials since then at Visakhapatnam, where it is being built.

The submarine has also been going through the power-up cycle of its nuclear reactor and has now achieved a nearly 100 percent power level, the official said.

"Its reactor had gone critical last year. We are now close to attaining 100 percent its power," the official said, adding: "The nuclear reaction is highly controlled. It is something similar to nuclear power plants, but extra caution is needed. The reactor is now functioning perfectly well," the official said.

Once the submarine attains 100 percent power, it will head out to sea for its final trials, which will include the firing of the indigenous Bo5 missile that has a 700-km range and can carry a one tonne nuclear warhead. INS Arihant can carry 12 such missiles.

The vessel, the lead ship of the Arihant-class submarines, was launched in 2009. Its design is based on the Russian Akula-1 class submarines and its 83MW pressurised heavy water reactor has been built with significant Russian assistance.

While its 100-member crew has been trained by Russian specialists, Indian scientists at Mumbai's Bhabha Atomic Research Centre have received significant expertise in reducing the size of the reactor to help it fit into the 10 metre diameter hull of the submarine.

The Indian Navy currently operates the INS Chakra nuclear-powered submarine leased for 10 years from Russia in 2012.

Nuclear submarines stay out at sea for longer periods than diesel-electric powered boats and can also remain under water for longer durations. Conventional submarines have to surface at regular intervals for re-charging their batteries, making them vulnerable to detection.

Two other vessels of the Arihant class are also believed to be under construction at Visakhapatnam's state-owned Hindustan Shipyard Limited.

 

[power_monger]

Indigenous nuclear powered submarine INS Arihant to head out for sea trials

India's quest for a secure seaborne nuclear deterrent is set for a giant stride when its first indigenously constructed nuclear submarine the INS Arihant begins sea trials next week.

Naval sources indicated a casting-off date of Monday, December 15, and preparations are currently underway at the Shipbuilding Centre, Visakhapatnam to ensure a smooth sail out for the 6,000-tonne nuclear powered ballistic missile submarine (SSBN).

"It will be a surfaced sortie, but a great milestone nevertheless," naval officials told India Today.

It has been a slow crawl for the Arihant since she was launched at the shipbuilding centre in Vizag on July 26, 2009. It was four years before the next major milestone could be crossed, in August 2013 when the 83MW reactor onboard the submarine went critical.

Navy chief Admiral Robin Dhowan told mediapersons on December 3 that the submarine would commence its sea trials "very soon" and attributed the five-year time lag to the complexity of the platform and its equipment. Sources say the navy chief Admiral Dhowan wanted Prime Minister Narendra Modi to be present at the cast-off, but it failed to materialize because of scheduling reasons.

Naval officials say the sea sortie marks the first in a series of steps-submerged sea trials and weapon firing trials which the submarine will have to cover before she is ready for induction into the navy, a process which could take another year.

The navy plans a fleet of five SSBNs, all of them capable of firing nuclear-tipped ballistic missiles from under the sea. Two more Arihant class submairnes are being fabricated at the SBC in Vizag and are likely to be inducted over the next five years.

India currently operates one nuclear submarine, the INS Chakra (the ex Russian sub 'Nerpa') taken on a ten-year lease from Russia in 2012. One of the items on the agenda of recent summit-level talks between Russian President Putin and Prime Minister Narendra Modi is believed to have been the lease of a second SSN, the unfinished 'Iribis', left unfinished after the breakup of the Soviet Union.