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Jeff Head

General
Registered Member
Indian Arihant Class Nuclear Ballistic Missile Submarines

ins-arihant-ssbn.jpg

Indian Defesne Research Wing said:
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In a major step towards achieving allround ability to launch nuclear payload from air, land and water, a 83 MWe pressurised water reactor (PWR), was fitted into INS Arihant and trials were conducted. The submarine was launched last year and began its ‘sea acceptance trials’ (SAT) earlier this year wherein it was taken out of the harbour.

With INS Arihant, India has become the sixth country after the US, Russia, China, France and Britain to have succeeded in constructing such a nuclear submarine.

Note, this is the indegenous INS SSBN sub, not the new Akula II SSN sub they are leasing from Russia. In addition, the second SSBN sub is coming along:

The Hindu said:
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The Hindu reported that the construction of a second Arihant-class nuclear submarine, to be named INS Aridaman, is moving fast at the Shipbuilding Centre (SBC) in Visakhapatnam. It is slated for launch by this year-end.

“The boat, under outfitting now, is headed for a year-end launch. Meanwhile, hull fabrication is on for the third Arihant-class nuclear-powered ballistic missile submarine,” the sources said. “Unlike surface vessels, submarines are fully outfitted before launch, which makes it a prerequisite for its weapons to be tested and ready well in advance.”

The first submarine of the class, INS Arihant, launched in July 2009, completed its harbour acceptance trials in Janauary and the crucial sea acceptance trials in February.

“This was be followed by weapon trials this summer before the submarine is formally inducted into the Navy, hopefully in 2013, when the country will attain the much-desired nuclear triad,” the sources said. Concurrently, nuclear-powered submarine INS Chakra, borrowed on a 10-year lease from Russia mainly for training purposes, will be inducted in the latter half of 2012.
 

MwRYum

Major
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

What about their solid fuel SLBM? Without SLBM and the ability to launch them underwater it means nothing...though in India's case, staying in-port or home waters they can still reach key targets in Pakistan and China.
 

cn_habs

Junior Member
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

When was the nuclear reactor finally installed in the Arihant after its launch in 2009? Is it domestic or Russian/produced under license?
 
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Jeff Head

General
Registered Member
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

When was the nuclear reactor finally installed in the Arihant after its launch in 2009? Is it domestic or Russian/produced under license?
From the articles:

The Hindu said:
Displacing about 6,000 tonnes, the 112 metre-long Arihant-class of boomer submarines are powered by indigenously-built 80-MW nuclear power plants. Each submarine is said to store 12 K-15 missiles besides torpedoes and torpedo-launched cruise missiles.

Indian Defense Research Wing said:
began its ‘sea acceptance trials’ (SAT) earlier this year wherein it was taken out of the harbour to conduct crucial trials. “The nuclear reactor was fitted into the submarine for the first time some time back." sources said. The challenge for Bhabha Atomic Research Centre was to make a compact reactor to fit into the 10-m diameter hull of INS Arihant (literally meaning slayer of enemies). The enriched uranium for the reactor comes from the Rare Materials Project, an undertaking of the Department of Atomic Energy, situated at Ratnahallai, near Mysore."

So, the reactor was installed clearly before the initial trials early this year, meaning probably some time early or mid 2011. The reactor is clearly stated in both articles to be an indegenous, domestic design.

The Sub will first carry the the 750-1900 km range K-15 nuclear missile (range dependant on payload), but has been designed for the Indian's new K-4 missile which will has undergone final flight tests and is supposed to be installed into the subs in the 2015 time frame. The K-4 will have a range of 3,500-5,000 km. Finally, ultimately they plan the K-5 missile which is under development with specs for 6,000 km range.
 

Apong

New Member
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

Aircraft carrier project delay to hit naval preparedness
Project runs two years behind schedule due to gearbox incompatibility


New Delhi, June 19
India's project to build a seaborne aircraft carrier of its own has been delayed by two years, raising questions on the Indian Navy's ambition to emerge as a dominant player in the Indian Ocean region. China is also keen to establish itself in this area.

About two weeks ago, the US had announced its new military policy to station more naval assets, including six aircraft carriers, in the Asia-Pacific region.

The Indigenous Aircraft Carrier (IAC), being built at Cochin Shipyard Limited, is facing delay in the installation of gearboxes for the four powerful engines of the 40,000-tonne warship. As per estimates arrived at by the apex committee of the Ministry of Defence (MoD) last month, the warship can now be launched by the end of this year. This will be almost two years behind its original launch deadline of October 2010.

Once the hull of the warship is launched at the sea, the outfitting is likely to take another four years, hence the warship is expected to be delivered to the Navy only by 2016, which is two years behind its original schedule. Defence Minister AK Antony had laid its keel in February 2009.

In January this year, the under-construction ship was taken out of the dry dock and stationed in the waters without some of the equipment that should have been in place.


Sources said one of the gearboxes had been fitted while another one arrived at the yard a few weeks ago. To get it fitted, the ship will have to be taken back to the dry dock. An Indo-German collaboration that supplied gearboxes for the 5,000-tonne stealth warship, INS Shivalik, was chosen in this case also. The aircraft carrier is almost 10 times bigger. The first lot of gearboxes provided by the company was unacceptable and had to be designed afresh.

The contract was to have around 18,000 tonne of the warship ready at the time of the launch, but it is still short by around 4,000 tonne, sources said. The MoD and the Navy have conveyed their displeasure to the shipyard and asked it to get the warship back to the dry dock and simultaneously continue with other works till the gearbox issue is sorted out.

The MoD had allocated Rs 230 crore for the modernisation of the shipyard. Since a modular-style construction has been adopted, it is possible to work on other equipment at another site.

The primary reason for the delay is the highly complex nature of the warship that India is attempting along with its simultaneous efforts to localise production. India is the fifth country attempting to make such a warship, which will have fighter aircraft stationed at its deck. So far, only the USA, Russia, the UK and France have produced such warships. China is re-fitting the one that it purchased from Ukraine after the USSR broke up.

Strategically, this delay will affect the Indian ambition to have two aircraft carriers in its Naval fleet. At present, India has only one, the INS Viraat, which after a life extension, is slated to retire in 2015. It is 50-year-old and the fighter aircraft on its deck, the Sea Harriers, are no more produced now. The second aircraft carrier, the Russian-origin Admiral Gorshkov, is undergoing sea-trials in Russia and is set to join the Indian fleet early next year under its new name, the INS Vikramaditya. In case the IAC is not delivered till 2015 - which is unlikely as per the present status - the Navy will be left with only one aircraft carrier, INS Vikramaditya.

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The bad news is the ship is behind schedule.
While the good news is this report claims that the launch process will complete at the end of 2012, this is some kind of a relief if not to cherish.

I think it is misreported that INS Viraat would retire on 2015, with the latest mid-service refit she should be able to remain operational till 2018 and service should be able to extend till 2020 if required.

I just wonder if those gearbox could have been ordered to reach earlier to prevent this kinds of delay.

---------- Post added at 08:21 PM ---------- Previous post was at 08:04 PM ----------

What about their solid fuel SLBM? Without SLBM and the ability to launch them underwater it means nothing...though in India's case, staying in-port or home waters they can still reach key targets in Pakistan and China.

The Shaurya Missile is believed to be a land based version of the project K-15 SLBM, it might not have an impressive range but it forms the learning phase of developing a SLBM, I don't have much idea of K-4 development, but a SLBM version of Agni class should be in the pipeline for making a higher range SLBM which I think is yet to be out of drawing board as I think a canisterised version Agni-V is currently in the process of development and a SLBM would follow up next.
 

joshuatree

Captain
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

The first lot of gearboxes provided by the company was unacceptable and had to be designed afresh.

Okay....major FUBAR there if it's a design issue. It mentioned Indo-German collaboration. I wonder who led the design portion?
 

Vini_Vidi_Vici

Junior Member
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

ins-arihant-ssbn.jpg


Wow, that sub surface looks rugged. Can't they make it smoother? I noticed similar problem in their latest warships. They all seem to not have perfect flat surfaces. Manufacturing problem?
 

joshuatree

Captain
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

Wow, that sub surface looks rugged. Can't they make it smoother? I noticed similar problem in their latest warships. They all seem to not have perfect flat surfaces. Manufacturing problem?

Probably less of a manufacturing problem and more of a manufacturing refinement capability? Sorta like in the chip industry, 22nm vs 45nm vs 90nm etc?
 

MwRYum

Major
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

But one thing is certain, their SSBN design - at least by the hull design - is superior to the Chinese, who still have to live with the noise-and-drag-inducing hump for its SLBM silos on the 094 SSBN.

But in terms of surface treatment and acoustic tiles Chinese have made progress, if their latest SSK designs are of any indication...when compare with the photo of Arihant, one must wonder why they skipped on this department? Didn't they learned from the Russians or Germans?
 
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paintgun

Senior Member
Re: Indian Arihant Class Nuclear Ballistic Missile Submarines

their hull design is derived from Russian expertise

however i would not comfortably put it ahead of the current 094 design, there are still many other factors

and that picture is a bloody old one

But one thing is certain, their SSBN design - at least by the hull design - is superior to the Chinese, who still have to live with the noise-and-drag-inducing hump for its SLBM silos on the 094 SSBN.

But in terms of surface treatment and acoustic tiles Chinese have made progress, if their latest SSK designs are of any indication...when compare with the photo of Arihant, one must wonder why they skipped on this department? Didn't they learned from the Russians or Germans?
 
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