I'm always trying to find why type 209 is better than Romeo in design, not about electronics, combat system and propulsion, as all of these can be upgraded. Would you be kind to offer some evidence? I'm not talking about Agosta 90B, and I know it is different from Agosta
bcoz there is a technological gap of mover 2o years... the design,the tech,propulsion system,armament, and all other capabiliyies like diving depth,speed,endurance etc is much more superior.
type-209:
romeo:
MESMA/AIP has low thermal efficiency, high noise, and medium cost-efficiency, while rumors say some type 035G have SE/AIP, which is mature, better thermal efficiency, low noise and best cost-efficiency.
Mesma is one of the most advanced system out there... originally designed for scorpene n agosta-90b..And in no way inferior but superior to sterling...As for a type 35 having an AIP... sounds like a joke... considering Chinas first sub to have AIP was the type 39!!! introduced in 2008!!
As of 2009, some nations have non-nuclear AIP submarines:
the French-Spanish Scorpène-class submarine (1,700 tonnes) (MESMA)
the Spanish S-80 class (2,400 tonnes) of the Spanish Navy
the German Type 209-1400mod (1,810 tonnes) (Fuel cell)
the German Type 212 submarine (1,830 tonnes) (Fuel cell) of the German Navy and Italian Navy
the German Type 214 (1,980 tonnes) (Fuel cell)
the Russian Project 677 Лада (Lada)
the Russian Project 1650 Амур (Amur)
the Japanese Asashio (2,750 tonnes) (Stirling AIP) of the Japan Maritime Self-Defense Force
the Japanese Sōryū class submarine (4,200 tonnes) (Stirling AIP) of the Japan Maritime Self-Defense Force
the Swedish Gotland class submarine (1,450 tonnes) (Stirling AIP) of the Swedish navy
the Swedish Södermanland class submarine (1,500 tonnes) (Stirling AIP) of the Swedish navy
Sweden is going to sell its remaining two Västergötland class submarines to the Republic of Singapore Navy after they have been refitted with Stirling AIP systems like the Södermanland class submarines.
the Chinese Type 041 Yuan class submarine (Stirling AIP) of the PLAN
Also several shipbuilders offer AIP upgrades for existing submarines:
German Nordseewerke (Closed-cycle diesel)
Sweden Kockums (Stirling), owned by German company ThyssenKrupp
Pakistan Agosta 90B class submarine Made with cooperation with France
French Scorpene made by French Company DCNS
MESMA® AIP System | DCNS
As of 2009, some nations have non-nuclear AIP submarines:
the French-Spanish Scorpène-class submarine (1,700 tonnes) (MESMA)
the Spanish S-80 class (2,400 tonnes) of the Spanish Navy
the German Type 209-1400mod (1,810 tonnes) (Fuel cell)
the German Type 212 submarine (1,830 tonnes) (Fuel cell) of the German Navy and Italian Navy
the German Type 214 (1,980 tonnes) (Fuel cell)
the Russian Project 677 Лада (Lada)
the Russian Project 1650 Амур (Amur)
the Japanese Asashio (2,750 tonnes) (Stirling AIP) of the Japan Maritime Self-Defense Force
the Japanese Sōryū class submarine (4,200 tonnes) (Stirling AIP) of the Japan Maritime Self-Defense Force
the Swedish Gotland class submarine (1,450 tonnes) (Stirling AIP) of the Swedish navy
the Swedish Södermanland class submarine (1,500 tonnes) (Stirling AIP) of the Swedish navy
Sweden is going to sell its remaining two Västergötland class submarines to the Republic of Singapore Navy after they have been refitted with Stirling AIP systems like the Södermanland class submarines.
the Chinese Type 041 Yuan class submarine (Stirling AIP) of the PLAN
Also several shipbuilders offer AIP upgrades for existing submarines:
German Nordseewerke (Closed-cycle diesel)
Sweden Kockums (Stirling), owned by German company ThyssenKrupp
Pakistan Agosta 90B class submarine Made with cooperation with France
French Scorpene made by French Company DCNS
Air-independent propulsion (AIP) is a term that encompasses technologies which allow a submarine to operate without the need to surface or use a snorkel to access atmospheric oxygen. The term usually excludes the use of nuclear power, and describes augmenting or replacing the diesel-electric propulsion system of non-nuclear vessels. The United States Navy uses the hull classification symbol "SSP" to designate boats powered by AIP, while retaining "SS" for classic diesel-electric attack submarines.[1]
AIP is usually implemented as an auxiliary source. Most such systems generate electricity which in turn drives an electric motor for propulsion or recharging the boat's batteries. The submarine's electrical system is also used to provide "hotel services"ventilation, lighting, heating etcalthough this consumes a small amount of power compared to that required for propulsion.
A benefit of this approach is that it can be retrofitted into existing submarine hulls by inserting an additional hull section. AIP does not normally provide the endurance or power to replace the atmospheric dependent propulsion, but allows it to remain submerged longer than a more conventionally propelled submarine. A typical conventional power plant will provide 3 megawatts maximum, and an AIP source around 10% of that. A nuclear submarine's propulsion plant is usually much greater than 20 megawatts.