2 more MESMA AIP by 2011!

[razgriz19]

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The Agosta submarines designed by DCN (now DCNS) of France, are currently in service with the French, Spanish and Pakistan navies. The Agosta 90B is an improved version featuring higher performance and a new combat system.

The new submarine features a higher level of automation, which has resulted in the ship's crew being reduced from 54 to 36. Other improvements include a new battery for increased range, a deeper diving capability of 350m resulting from the use of new materials including HLES 80 steel, and a reduced acoustic signature through the installation of new suspension and isolation systems.

Three Agosta 90Bs were ordered by the Pakistan Navy in September 1994. The first, Khalid (S137), was built at DCN’s Cherbourg yard and was commissioned in 1999. The second, Saad, assembled at Karachi Naval Dockyard, was launched in August 2002 and was commissioned in December 2003. The third, Hamza, which has been constructed and assembled in Karachi, was launched in August 2006 and was commissioned in September 2008.

"The Agosta 90B is an improved version of the Agosta submarine, featuring higher performance and a new combat system."Work on the vessel was halted for a time following a terrorist attack in May 2002, which killed 11 French engineers in Karachi. The third submarine is fitted with the MESMA air independent propulsion system.

The third submarine is being fitted with the MESMA air-independent propulsion system, which will be retrofitted to the first two. The MESMA AIP has successfully completed Pakistan Navy acceptance trials.

In March 2007, Pakistan placed an order with DCNS for the retrofit of the MESMA AIP to the first two Khalid Class submarines. The retrofit kits will be delivered to the Karachi dockyard in 2011.

Pakistan has been given a license by DCNS to offer commercial production of the submarines to potential customers.

SUBTICS command and control system

The Agosta 90B submarines are equipped with a SUBTICS fully integrated combat system. This is supplied by UDS International, a joint subsidiary of DCN International and Thales, now wholly owned by DCNS. SUBTICS processes signals from the submarine's sensors, determines the tactical situation by track association, fusion, synthesis, trajectory plotting and management and handles all weapon command and control functions.

Torpedoes

The Agosta 90B submarine is fitted with four bow 533mm torpedo tubes and has the capacity to carry a mixed load of up to 16 torpedoes and missiles. The submarine can be equipped with the ECAN F17 mod 2 torpedo, which is a wire-guided torpedo with active and passive homing to a range of 20km. The torpedo delivers a 250kg warhead to a depth of 600m.

MBDA Exocet SM39 missiles
The Agosta 90B is equipped with the torpedo tube launched MBDA (formerly EADS Aerospatiale) Exocet SM39 missile. Target range and bearing data is downloaded into the Exocet's computer.

The missile approaches the target area in sea-skimming mode using inertial navigation and then active radar homing. The missile travels at speeds over Mach 0.9, and has a range of 50km. Exocet has a 165kg high-explosive shaped-charge warhead.

Electronic warfare

The Agosta 90B submarines are equipped with the Thales DR-3000U radar warning receiver, operating in D to K bands.

The system uses a masthead antenna array with omnidirectional and monopulse directional antennae and a separate periscope warning antenna.

"The Agosta 90B submarine is fitted with four bow 533mm torpedo tubes and can carry up to 16 torpedoes and missiles."Sensor suite

The submarine is fitted with a Thales Underwater Systems (formerly Thomson Marconi Sonar) TSM 223 sonar suite, which includes bow-mounted sonar and towed sonar arrays, SAGEM periscopes and navigation system and Thales I-band navigation radar.

Propulsion systems

The Agosta 90B class submarines can be equipped with a diesel-electric propulsion system or the MESMA air-independent propulsion system. The diesel-electric system consists of two SEMT-Pielstick 16 PA4 V 185 VG diesels providing 3,600hp and a 2,200kW electric motor driving a single propeller.

A diesel-electrical submarine has to surface to periscope depth to recharge the batteries using the diesel engine, leading to increased risk of detection. The MESMA air-independent propulsion system, being fitted to the Agosta 90B submarines for Pakistan, allows the submarine to remain submerged three times longer.

The MESMA system consists essentially of a turbine receiving high-pressure steam from a combustion chamber, burning a gaseous mixture of ethanol and liquid oxygen. The Agosta 90B's performance remains the same in all other respects, except that the length increases from 67m to 76m and submerged displacement from 1,760t to 2,050t.

http://www.naval-technology.com/projects/agosta/


IF U ALREADY KNO THIS THEN JUST IGNORE IT! please and thank u!

[razgriz19]

here is a pic of a secong MESMA AIP going through testings before getting handover to PN

[Super Falcon]

goos to hear they got air independet proplusion system how much dollars it costed our navy and how much time it will take to retrofit them in our submarines

[AZADPAKISTAN2009]

We have 3 agostas , why don't we just install these units into 2 new agostas maes no sense to put apart funtional submarines for these units

If we just produce 2 new subs not only will be get 2 new subs but the advance features

[gowthamraj]

India only get AIP in 2016

[khurasaan1]

India only get AIP in 2016

Hey guyz dont cry ...we understand urz pain....Maybe Pak might help u...

[Penguin]

We have 3 agostas , why don't we just install these units into 2 new agostas maes no sense to put apart funtional submarines for these units

If we just produce 2 new subs not only will be get 2 new subs but the advance features

It is quite a common practise to cut a sub to install AIP. Swedes have been doing this for years, for example. It is much cheaper to upgrade an existing sub (with sufficient service life left in it) this way than it is to get an entirely new sub.

[AZADPAKISTAN2009]

It is quite a common practise to cut a sub to install AIP. Swedes have been doing this for years, for example. It is much cheaper to upgrade an existing sub (with sufficient service life left in it) this way than it is to get an entirely new sub.

Interesting point never knew you can cut open a sub to install stuff , I always thought it would be more expensive , and rather easier to install this item prior to completion of the project

These french .... can't do nothing right ... they should have given us a fully assemble product

[Nishan_101]

i think it was good that they are up-grading the two subs with MESMA AIP and they should have continued the development of Agosta-90B from 2006 and to induct 3 more with newer combat management system and Mesma AIP and try to offer 2 newly built to Bangladesh.

[araz]

We have 3 agostas , why don't we just install these units into 2 new agostas maes no sense to put apart funtional submarines for these units

If we just produce 2 new subs not only will be get 2 new subs but the advance features

The last one came in with the MESMA installed on it.The other two Agostas will have them indstalled in 2011 when they come in for their major service.
Araz

[flanker143]

Hey guyz dont cry ...we understand urz pain....Maybe Pak might help u...

pak help ???? .... mesma ain't pak made....

[Super Falcon]

well the first two agosta was only not been fitted with AIP Mesma third sub was fitted with mesma if we are again ordering as thios thread says two more than where they would be installed if we last time ordered the two mesma systems for first two subs

[Penguin]

Interesting point never knew you can cut open a sub to install stuff , I always thought it would be more expensive , and rather easier to install this item prior to completion of the project

These french .... can't do nothing right ... they should have given us a fully assemble product

The Swedish Södermanland class of diesel-electric submarines consist of the HMS Södermanland and HMS Östergötland. These two submarines were originally launched as Västergötland class submarines in 1987 and 1990, and have been relaunched as a new class after extensive modernization 2003 and 2004 by Kockums AB. The pressure hull had been cut in two after the sail and a 12 m long new section with an air-independent propulsion system was inserted. It contains a Stirling engine which is coupled to an electric generator and heated by burning diesel fuel with liquid oxygen stored in cryogenic tanks. The AIP system can provide electric energy to extend the submarine's submerged time from days to weeks.

Södermanland class submarine - Wikipedia, the free encyclopedia

The A-17 Västergötland class of diesel-electric submarines was introduced in 1987 by the Swedish NavyThe original four ships of her class, HMS Västergötland, HMS Hälsingland, HMS Södermanland and HMS Östergötland, were built between 1983 and 1988 by Kockums AB. The latter two have undergone comprehensive refits, including the insertion of a new hull section with an AIP system equipped with Stirling engines. They have been recommissioned as the new Södermanland class.

The other two had been put in reserve until November 2005, when they were sold to the Republic of Singapore Navy. They are to be refitted to Södermanland-class standards and receive additional climatisation for use in tropical waters

Västergötland class submarine - Wikipedia, the free encyclopedia

AIP is offered by various parties for various subs. In many cases as upgrade (i.e. like above, by inserting a new section). It's the modular design and building techniques used for modern subs (building the sub in segments, which are then put together) that allows such modifications. In the same way Russia offers VL launchers for subs: as a hull plug added in at the request of the customer, either in new built sub or as modification of existing sub.

[AZADPAKISTAN2009]

What kind of technical advantage do these items offer ?

Then the traditional subs - ?

[Super Falcon]

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well do any american submarine have AIP system all european submarines has this system this is calles air independent air fuel which make sub to dive for longer periods of time