Re: PLAN submarines Thread II
considering China has its own supercomputers which can model climate change, monitor weather, study space I think its quite ok to assume China can make very quite and advanced submarines
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How quiet are Chinese submarines?
Regarding sound-dampening technology, we know China uses very advanced seven-axis machine tools to build their submarine's quiet seven-bladed asymmetric propeller. Also, we can see the anechoic tiles on Chinese submarines that dampen their acoustic signature. We can reasonably assume that China uses powerful supercomputers to design their submarines.
However, you want to know the answer to the big question. How quiet are Chinese submarines compared to American and Russian submarines? That's a highly-classified military secret. I don't think anyone without Top Secret clearance knows the answer to that question.
I will assume you want me to provide you with my best educated guess. Firstly, China built its first Type 033 Romeo-class submarine around 1962. Today, it is 2012. China has 50 years of experience in building submarines.
Secondly, China recently built the world's fastest supercomputer (which was just dethroned by the Japanese). China's ability to conduct fluid dynamics modeling of its submarine designs on supercomputers is equivalent to western nations.
Thirdly, China has advanced CNC (Computer Numerical Control) machine tools to manufacture propeller blades and other parts to very tight tolerances (see citation below).
I think the conclusion is almost inescapable. Chinese submarine design and manufacturing technology are very close to the Americans. American submarines are probably quieter, but not by much.
To build a quiet submarine is a straightforward application of physics and materials science. Chinese scientists excel in physics and materials science.
Now, let's deal with the elephant in the room. To put it mildly, the U.S. Navy has operated many more patrols than the PLA Navy. To become an effective submarine hunter, it requires a lot of expensive real world patrols. The U.S. Navy wins hands down at this point in time.
To use an analogy, I believe a Chinese sniper rifle is almost as good as an American sniper rifle. However, the American sniper has been hunting for sixty years non-stop. The Chinese sniper has only been out in the field for a few years. The greenhorn will get killed out there.
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From my April 14, 2011 post:
China's CKX5680 Digitally Controlled 7-axis Contour Milling Machine