CV-17 Shandong (002 carrier) Thread I ...News, Views and operations

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by78

General
1) 002's power system is not a commonly defined conventional power system. Electrical propulsion?
2) Proper steps for catapult installation in the future have been taken during design and construction?
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How the hell did you get 1) and 2) from the video? The 'expert' said absolutely NOTHING about electric propulsion or retrofitting catapults to Shandong. :mad:

Let me remind you, Sinodefence Forum is not a fanboy site.
 
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Tam

Brigadier
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The argument against 346B on 003 is the same as the argument against SPY-3/4 on Ford: it is a significant expense that duplicates escort capabilities and moreover makes it easier to find the carrier in wartime, i.e. by her radar emissions. My understanding is that in wartime carriers would typically be under emissions control so as to complicate the task of locating her. Of course the radar emissions from her escorts and AEW can be detected and serve as a general indication, but without further data this is likely insufficient to guide a missile salvo. A big radar set on 001 and 002 makes some sense owing to lower numbers of high-end AAW escorts in service at the time, and the lack of fixed-wing AEW, but 003 and beyond faces a calculus similar to Nimitz/Ford IMO. Unless the assumption is that there is no realistic prospect of concealing the precise location of China's carriers at sea...

Actually, the very opposite. One reason why AESA is used on these carriers, and why the 055 goes out all AESA even in her secondary radars, is that AESA is deftly capable of LPI or Low Probability of Intercept. This goes back to explaining why AESA also equips stealth fighters like the J-20, F-22 and F-35.

LPI allows you to scan in very low power, using highly agile frequency modulated pseudo random waveforms if you want the Star Trek style technobabble, that for most ESM receivers, they would look like noise or static in the background. Chances are even if the signals are detected but the noise filtering algorithms would consider them noise and filter them out, so the ESM would not alert the target plane or ship. This sounds very high tech but in fact, the mobile phone in your pocket already incorporates a related technology in order to prevent one phone from crossing the line with another.

If you want to lay it short, its like stealthy radar. However, do note that operating in LPI mode does not mean your radar is operating in its full performance potential in terms of range and acquisition of low observable targets. That's the catch of it. LPI is not exclusive to AESA, as TWTs have been proven agile enough to allow PESA and mechanical arrays to achieve this, but AESA is on the top of the ladder.

Using AESA also means the radar generates multiple tight beams with virtually no sidelobes. If you have a flashlight and light up a target, you will notice the light leaking from the sides, and that's essentially like sidelobes. Usually, Radar A will be detected by Target B if A lights up B directly. ESM unit C, which is not on the direct beam of Radar A, will rely on the sidelobes of A to detect A. Sidelobes are leaks that ESM units catch onto to detect an enemy radar, and decades of development in antenna design are meant to reduce sidelobes to as low as possible with AESA being once again, on the apex of the ladder.

Ships that have AESAs tend to be hybrids. They may feature one or two sets of AESA but they also have mechanical or PESA radars among their secondaries like navigation radars, surface search radars, and fire control radars. They may go LPI on their AESA search radars, but they cannot use their secondary radars for fear they might get detected. They might be going ninja in the night but they are also partly blinding themselves. A good example would be Type 052C and the 052D. Or every modern warship in the world that has an AESA right now. You are painting the sky but who is painting the horizon and the surface? Typically, the main AESA is the search radar doing volume search on the air, but not the sea, which can leave you blind for a not detected sea skimmer. The surface search radars on the 052C and 052D, the Type 364 radar, is a mechanical radar that uses a parabolic antenna. This radar is used for spotting sea skimmers. However, operating it risks detection by enemy ESM.

Going all AESA like on the Type 055, means every functional radar on the ship can operate in LPI mode. This allows for a secondary layer of scanning at the surface for sea skimmers to be done in LPI. You eliminate the reliable but mechanical Type 364 radar with an AESA on top of the mast for LPI scans near the water surface for surface targets. Another set of small AESAs on top of the deckhouse can also operate in LPI mode and aids in surface search and ship navigation. This allows the ship to be fully functional, operating in LPI.

That's the whole idea being done with the Zumwalt, with the SPY-3 and SPY-4 AESA radars, which the Ford class carriers adopted the same radar configuration. They deleted the SPY-4 S-band radar, which is the bigger radar off the Zumwalt for cost reasons, but its retained on the Ford class.

Type 001 and 002 carriers have the same radar configuration: Type 382 at the top, two Type 364 on top of the island at both ends, Type 346 and 346A as their main radars, and Type 348 or 349 (like small CIWS radars) used for landing radars. In an LPI mode, only the Type 346 radars can be used, with the Type 382 and 364 radars being silent. That means air volume search only, the surface scanning will be off.

003 differs because it has the 055's set, both Type 346B and the set of four faced X-band radars, which makes it correspond to the SPY-4 and SPY-3 on the Ford class. The S-band can go LPI on volume air search mode, while the X-band can go LPI on the surface scanning mode looking for sea skimmers.

I expect the next generation 052 and 054 future frigate to go all AESA.

Do you notice why on the Type 075 LHD, the Type 364 radar is now eliminated for a new dual band AESA? It can shut off its Type 382 main radar, and choose to operate this new radar in LPI mode. This new radar is dual band, the larger S-band face is pointed to the air for air search, while the smaller X-band face is pointed to the surface for surface search. This radar is intended to accomplish both goals in a single set.

This basic info is for people to catch up on this important concept. You cannot forego the importance of this and how it would frame future PLAN warships in the electronic and sensor configuration.

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TK3600

Major
Registered Member
How the hell did you get 1) and 2) from the video? The 'expert' said absolutely NOTHING about electric propulsion or retrofitting catapults to Shandong. :mad:

Let me remind you, Sinodefence Forum is not a fanboy site.
1 is mentioned. Electrical propulsion is a guess at what the novel conventional propulsion is. 2 is strongly implied. "The ship is designed to be future proof it is prepared to take on next gen fighter 20 years later.
 

by78

General
1 is mentioned. Electrical propulsion is a guess at what the novel conventional propulsion is. 2 is strongly implied. "The ship is designed to be future proof it is prepared to take on next gen fighter 20 years later.

Item 1) is not mentioned, not even close to how @Just4Fun phrased it. The context here is important. The so-called expert in the video compares Liaoning and Shandong, saying that even though the two carriers are outwardly very similar, there are internal and technological differences. He went on to say that conventional power broadly includes boilers, turbines, and electric drives. He 'thinks' Shandong has a 'new' conventional propulsion system compared to the Soviet-era Liaoning. Well you don't say!

Item 2) again is not mentioned. The word catapult does not appear once in the video, nor was it ever implied. Again, the expert mentioned that the service life of a carrier could be up to 50 - 60 years, enough for two generations of carrier fighters. Therefore, the expert speculates that Shandong contains design provisions to accomodate the next generation of carrier fighters. I have no idea how @Just4Fun could have made such a wild leap from something so innocuous. Actually, I know the answer: a rabid fanboy's wildly delusional wishful-thinking could well lead him to hear and see things that are not there.

Again, Sinodefence Forum is not a fanboy website. There are many internet forums for that purpose. This is not one of them.
 
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