09III/09IV (093/094) Nuclear Submarine Thread

grulle

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given how fast they are churning them out, I highly doubt they will stop at 8 boats. 16 is the bare minimum I think.
 

Hub

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09IIIB hull 4 by my reckoning:

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Yes, I agree with that. I wonder if one of the establishment defense media will do the task of taking a higher quality satellite im
They sure are making a lot of these Type 093B considering they are basically new boats. They likely changed everything inside the boat. I was expecting just a small production run and them focusing on the Type 095. This is pretty impressive.
Not everything inside, at least main structures and reactors mostly are the same. It more like a gen3 aircraft with 4.5 gen avionics and weapon configuration, a J8 with J16 like equipments.
 

tphuang

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Well, the heart and soul of a nuclear submarine is it stealth. You cannot change its stealth without designing all the noise making components with rafting in mind.

I don't see how you can compare this to flankers with more modern avionics
 

Hub

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Well, the heart and soul of a nuclear submarine is it stealth. You cannot change its stealth without designing all the noise making components with rafting in mind.

I don't see how you can compare this to flankers with more modern avionics
In fact, the stealth/acoustic characteristics of a submarine largely depend on its structural design, and the parts related to it have always been the most difficult to improve in the later stages. Reactor performance is a similar bottleneck. According to the general view, 093B has not changed its basic structural design and reactor, but has only been improved based on contemporary technology. Therefore, it can be expected that limitations imposed by its original design must still exist.

the J8/J16 analogy may not be completely appropriate, but it should be comparable to a certain extent. This is also the reason why China still needs to further develop 095. Many structural system issues need to be considered at the beginning of the design.
 

antiterror13

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Not everything inside, at least main structures and reactors mostly are the same. It more like a gen3 aircraft with 4.5 gen avionics and weapon configuration, a J8 with J16 like equipments.

I think likely the main structures are totally different. And for sure the reactor will be a new design
 

Blitzo

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Not everything inside, at least main structures and reactors mostly are the same. It more like a gen3 aircraft with 4.5 gen avionics and weapon configuration, a J8 with J16 like equipments.

In fact, the stealth/acoustic characteristics of a submarine largely depend on its structural design, and the parts related to it have always been the most difficult to improve in the later stages. Reactor performance is a similar bottleneck. According to the general view, 093B has not changed its basic structural design and reactor, but has only been improved based on contemporary technology. Therefore, it can be expected that limitations imposed by its original design must still exist.

the J8/J16 analogy may not be completely appropriate, but it should be comparable to a certain extent. This is also the reason why China still needs to further develop 095. Many structural system issues need to be considered at the beginning of the design.

Well, that's the question.

Namely how much of the pressure hull geometry is changed versus the original 09III variant and subsequent variants (which will determine how much volume they have for soundproofing etc), as well as whether they retain the exact same reactor, or an upgraded variant, or a new type.


We do not have clear answers to those questions and it is not something we can surmise externally.

Obviously the double hull design and being the same overall dimensions as the original 09III will pose a ceiling as to its capability, which is why 09V as a clean sheet design is significant.
 

grulle

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I found this thread on indian forums regarding the noise of the type 93 (Original? or A ). they listed the US naval college as the source. they say the 93 has noise of 110 decibels, which is equal to the LA class (Original or upgraded not sure).

unfortunately the source from the US naval college is not available anymore so I just posted the thread here.

Thoughts on this?
 

davidau

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I found this thread on indian forums regarding the noise of the type 93 (Original? or A ). they listed the US naval college as the source. they say the 93 has noise of 110 decibels, which is equal to the LA class (Original or upgraded not sure).

unfortunately the source from the US naval college is not available anymore so I just posted the thread here.

Thoughts on this?
Yeah old news... but how about tpye 093B?
 

THX 1138

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I found this thread on indian forums regarding the noise of the type 93 (Original? or A ). they listed the US naval college as the source. they say the 93 has noise of 110 decibels, which is equal to the LA class (Original or upgraded not sure).

unfortunately the source from the US naval college is not available anymore so I just posted the thread here.

Thoughts on this?

I haven't read the link you provided. However, I do see that the PDF filename is dated 2007. The only Type 093 in service at that time was the original, and it was certainly not as quiet as a Los Angeles class submarine. The PLAN stopped building Type 093 after the first two, which speaks volumes about their disappointment with those two subs.

There was very little available information about the Type 093 in 2007. During its development, I believe some Chinese researchers optimistically projected that it would be comparable to the Los Angeles class. I suspect that the US Naval War College simply took those projections at face value, and so in 2007 they assigned to the Type 093 the same "110 dB" noise level they did to the Los Angeles class.

In 2009, the US Office of Naval Intelligence's assessment of the Type 093 was "noisier than Victor III".
 

grulle

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This 2023 US naval war college report estimates the 93B to be on par with Sierra I. Not sure how that compares to the LA class in terms of noise. but the Sierras were very capable subs, made of titanium.
 
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