care to show us that original graph?
wasnt aware that kind of milling equipment was civilian use. The US must have been pretty mad about it at that time.
Speculation and facts on future Chinese vessels
- Thread starter SinoSoldier
- Start date
care to show us that original graph?
wasnt aware that kind of milling equipment was civilian use. The US must have been pretty mad about it at that time.
asif iqbal
Lieutenant General
I am not sure about this comments about Chinese submarines noise levels
After evaluation of Chinese submarines Pakistan dropped U214 deal so that says a lot
After evaluation of Chinese submarines Pakistan dropped U214 deal so that says a lot
I think the article discussion is centered with SSN's Nuclear powered. Not the conventional one... Even in my own opinion, I can already conclude that China's conventional submarines are either at par or better than Western Standards...
But what about those nuclear powered?
asif iqbal
Lieutenant General
Ah good point missed that!
-.-
As much as I would like to spend however long it is to google it up, I don't.
I can't remember the name of the company it was exactly, but there were definitely penalties.
Hendrik_2000
Lieutenant General
This chart are bogus nothing but guessing . They not only predict the noise of Type 095 even though the Chinese haven't built it yet. They also did the same with type 93 and 94 back in the 70's Some one from CDF complaint to Hans Kristensen . His comment as usual is the mysterious Navy sources.
I tell you nothing of sort. submarine noise come from 3 sources. The cavitation of propeller that is why Sub propeller rotate so slowly compare to surface ship to reduce velocity and therefore reduce incipient cavitation . Therefore you have to make the prop efficient . Everybody know the equation to make it efficient. It is no big deal. The problem making it,almost impossible without the CNC milling machine. Well China can now make the 7 axis CNC propeller milling machine . Martian post it sometime ago in the Chinese science and technical thread.
Here is martian post on Chinese Submarine He did great job of compiling all sort of article about Chinese Sub
The 2nd sources of noise are the pump and other rotating machinery inside the submarine . Well these are common occurrence in industrial plant . There are huge literature in the civilian tech how to attenuate the noise with passive or active suppressant. The theory is well developed and understood. I am convinced the Chinese know it too.
The 3rd source of noise is the Hydrodynamic as it glide through the body of water. That depend on the shape of the sub and noise abating tile.
We all can see the shape of Chinese Submarine it is not much different than any other submarine out there So I expect similar performances
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antiterror13
Brigadier
Yes, it was a big scandal, the company was Toshiba who sold advanced CNC machines to USSR in 80s.
Do you guys really believe China don't have the capability of USSR in 80s. China imports a lot of highly advanced CNC machine freely from Germany, Japan and also China produce highly advanced (and export them) CNC machines. CNC machines now is far far far more advanced than the ones in 80s
Mysterre
Banned Idiot
LOL this kind of reasoning is enough to elevate PLAN subs to the levels of USN subs? Sounds like you know all that is needed to be known about submarine quieting technology.
Until the day they really mass produce them, I tend to agree with kroko that they are very much lacking behind.
However, is this the same situation with diesel subs? I have this impression that they are totally different beast than nuclear subs technology and performance wise. The difference is not just the reactor, but even operational doctrine.
Kilo is by Western standard, is an advanced sub, and we all know China can produce much more advanced subs than Kilo, so how are they on this?
However, is this the same situation with diesel subs? I have this impression that they are totally different beast than nuclear subs technology and performance wise. The difference is not just the reactor, but even operational doctrine.
Kilo is by Western standard, is an advanced sub, and we all know China can produce much more advanced subs than Kilo, so how are they on this?
Much of the diesel-electric tech has been carried over to the SSNs, in terms of subsystems like electric drive systems, diesel auxiliary generators et al. The biggest element specific to the SSNs is the reactor plant itself, but the ability to carry over tech for most other systems simplifies the degree of engineering investment necessary to improve the SSNs, not to mention improvements in manufacturing capability.