Yuan Class AIP & Kilo Submarine Thread

[antiterror13]

do you guys think that the latest Yuan capability and technology have reached Sōryū-class submarines ? or just roughly the same as Oyashio ?

I believe between Oyashio and Sōryū, perhaps 80 - 90% of Sōryū ... just a thought

 

[tphuang]

do you guys think that the latest Yuan capability and technology have reached Sōryū-class submarines ? or just roughly the same as Oyashio ?

I believe between Oyashio and Sōryū, perhaps 80 - 90% of Sōryū ... just a thought

there is no evidence yuan have reached Oyashio or soryu. Yuan is probably comparable to Kilo in noise level

 

[shen]

there is no evidence yuan have reached Oyashio or soryu. Yuan is probably comparable to Kilo in noise level

There is no reason why Kilo is not as quiet as Oyashio or Soryu when running on batteries. Kilo's disadvantage is it has to snorkel periodically, running the diesel generators is noisy. Yuan of course has AIP, thus is much quieter operationally compare to the Kilo.

 

[Blitzo]

I think we don't know anything to be able to compare yuan with any other subs apart from ones in PLANs inventory.

I would be surprised if yuan did not improve on acoustics compared to kilo. PLAN know how quiet kilo are, it's not a stretch to say they'd want a domestic product that is at least comparable. And when we consider that yuan is also a newer design even accounting for how advanced the PLAN sub building industry was in early 2000....

Most of the really useful noise reduction measures would be internal rather than external anyway, so looking for physical evidence on the outside of a sub is not necessarily the most useful way of determining anything

 

[Jeff Head]

TAS on the Warlus class is an interesting story. Developed f"for," but not "woith," as I understand it.

Either way, the internal of the cable is going to run into the boat, either directly or via a connector to allow the information it is gathering to be passed to the systems within the boat.

TAS has to be deployed in as quiet a manner as possible so the boat itself maintains as silent a running condition as possible.

The Walrus design is a design that was started in the 1970s. The four vessels were laid down from 1979 through 1988 and commissioned from 1992 to 1994...over 20 years ago for the last one. It was a protracted design, development, and deployment program.

The intitial Dutch go-ahead in 1979 came before the design was completed. It was not until 1986 that all of the design criteria were finally hashed out...by which time they had to go back and retrofit things to vessels that were already under construction.

The first unilt had a major fire during construction that cost about $100 million to repair and delayed it be a couple of years or more.

I have heard rumors that the Walrus class were utlimatley wired for TAS but not with, and that they add a TAS for training exercies which they borrow from the UK. That may account for seeing them in the condition you have shown.

 

[Jeff Head]

There is no reason why Kilo is not as quiet as Oyashio or Soryu when running on batteries.

Actually, there can be lots of reasons that one DE SSK may be more noisier than another DE SSK while operating on batteries.

Batteies power helps a lot for the engine noise itself, but those batteries power all sorts of equipment that operates while the boat is underway. Technology to quiet all of those devices is also very closely kept and guarded.

Any of them can add significantly to the overall noise level of the boat.

 

[Blackstone]

Actually, there can be lots of reasons that one DE SSK may be more noisier than another DE SSK while operating on batteries.

Batteies power helps a lot for the engine noise itself, but those batteries power all sorts of equipment that operates while the boat is underway. Technology to quiet all of those devices is also very closely kept and guarded.

Any of them can add significantly to the overall noise level of the boat.

Are Kilos double hulled? What about Soryu subs?

 

[Blitzo]

Kilo is double hulled, a bit of googling says that soryu is double hulled too?


The proposed U216 is also double hulled as well.

Looks like double hull doesn't necessarily mean a noisy sub.

 

[TerraN_EmpirE]

Okay color me stupid, but arn't all modern subs double hulled? I mean there is the inner pressure hull here the crew lives then the outer hull which is used to contain all the parts open to the sea. The outer hull has the balest tanks the sonar the shaft for the propeller the conning tower and the shafts of the torpedo tubes.

 

[Blitzo]

Okay color me stupid, but arn't all modern subs double hulled? I mean there is the inner pressure hull here the crew lives then the outer hull which is used to contain all the parts open to the sea. The outer hull has the balest tanks the sonar the shaft for the propeller the conning tower and the shafts of the torpedo tubes.

I'd like an answer to that as well -- the closest representation I've found is this