I disagree with u
No brahmos and not 4 only 2 will get aip that too if drdo aip is ready!
From joshi himself dec 2012
There is uncertainty over the possibility of Air Independent Propulsion (AIP) being installed in the last two of the six Scorpene submarines being built atMazagon Dock Limited in Mumbai.
Indian Navy chief, Admiral D.K. Joshi told reporters at the annual Navy Day press conference on Monday that the task of indigenous development of an AIP Plug for the fifth and sixth Scorpene submarines has been given to the Naval Materials Research Laboratory (NMRL) of theDefense Research and Development Organization (DRDO) and would be installed on them only if the development is completed within the schedule of the construction of the two submarines.
"AIP plugs for the fifth and sixth of (Project) 75are under consideration.DMRL (sic, actually NMRL)has been tasked to develop that. It is doing so. What is to be seen iswhether the DMRL timeline Matches the delayed production timelines of (Project) 75. In case this comes onlinein conformity with the fifth and sixth ones theywill be put into place, butif for some reason they are not ready at that point in time we would not delay the production timelines."
The last of the Indian Scorpenes is expected to be delivered by September, 2018.
The French manufacturer of the Scorpene class of submarines, DCNS, had earlier offered to install its own AIP Plugon the the two Indian Scorpene submarines.
Air Independent Propulsion is an auxiliary system for increasing the endurance of the boat's sub-surface operability. The DCNS system, known as MESMA (Moduled'Energie Sous-Marine Autonome), is based on the combustion of storedoxygen and ethanol to augment battery-powered propulsion.
Joshi also said the NMRLdevelopment of the AIP Plug could be utilized forthe second line of submarines to be constructed under the Project 75 (India) program. "This would become an option for any of the subsequent indigenous options," he said, confirming, "The next line will have an AIPplug."
Joshi said the he expected progress on Project 75 (India). "In so far as the secondline (submarines) RFP is concerned, it'll be out very soon. DAC (DefenseAcquisitions Council) approval has already been accorded for it."
Uncertainty over AIP for Indian Scorpene submarines | StratPost stratpost %28StratPost%29
April 2014
Mumbai:India will feature an electric propulsion for its future LPD (Landing Platform Docks) project and the Navy– DRDO Fuel Cell AIP will be ready for submarine refits, said Indian Navy officials during an SMM India (subsidiary of maritime tradefair SMM Hamburg) hosted event on 4th and 5th April.
Rear Admiral DM Deshpande, VSM, DG Project – 75 (Scorpenes) Naval Head Quarters, who spoke about electric propulsion for futureIndian submarines, describedthe Navy – DRDO fuel cell system, which was progressing.
He named 10 companies involved in the AIP project led by L&T at NMRL ( Naval Materials Research Laboratory ) Ambarnath. The ten companies involved in IndianAIP propulsion design includeThermax, IOCL, L&T, Texol, Indian Institute of Petroleum, AKSA, CDAC, Gigitronics, ROLTA and MDL. (no tata)DRDO units involved in the project are NMRL, CEEFES, NSTL, RCI andNPOL.
DRDO AIP Fuel Cell diagram
The Hydrogen based Indian AIP design has no Carbon Dioxide (unique to French MESMA) emission. The waste products are stored in a separate container in slurry form. Since there are no emissions into the water, there are less chances of the submarine being detected. In addition to upcoming Project 75 (I) submarines, DRDO AIP can also be deployed in existing HDW T-1500 submarines (Shishumar Class) in Indian Navy service.
Indian Navy Fuel Cell AIP Plug. Slide MoD
On submarine indigenisation,Rear Admiral Deshpande saida lot Indian systems will be incorporated in the P-75 (I) submarines, including water cooled propulsion system, switchboards, 415 V NES -607 transformer board, 6.6 kv circuit breaker etc, which have been learnt through the Project 75 project.
Indian Navy LPD to feature electric propulsion, upbeat on DRDO Fuel Cell AIP