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Chengdu J-20 5th Generation Aircraft News & Discussions

Thanks Deino.

As far as I know, most if not all in-service engines in the AL-31 family have the same 'double-layer' petal arrangement. I've been checking plenty of pictures.

The AL-31F on the Su-27 has it.
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The 117S has it.
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So the petal shape (thanks for mentioning the cant in the petal) and petal arrangement in the J-20 nozzles are very strange indeed.


Yes, But I don't think that this double layer design is a stand-alone feature to identify an AL-31 version and even more if all other details (sans the colour) say it is one and this design feature could also be easily superseded by an updated design, esp. since it has the same general shape.

Anyway ... any news on '2101' ???
 
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indeed a beauty, isn't it? A great news from China and one of the many surprises as usual. Haters will continue to live in hate world and the one will be enjoying every moment with any thing it has. So congrats China for the achievement. and I think the engine mystery would be solved in the same fashion too. way to go China.
 
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Five years of J-20 development, hundred times take off

221638chbbvrozr0g5ho3g.jpg
 
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Look at the transformation what inspires me more is getting more beautiful & deadlier day by day. reminds me of Beauty and the Beast. way to go China. i hope such canopy would do wonders in near future.
 
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In a Christmas gift for Chinese fighter pilots, December 25th saw the unveiling of a new J-20 fighter in fresh yellow fuselage primer on the runway of the Chengdu Aviation Corporation (CAC) factory. More notable than its paint color, however, was the numbering of the plane: "2101." As opposed to "2018" or "2019" to follow the eighth flying prototype "2017," "2101" suggests the plane is the first of the low rate initial production (LRIP) airframes, which signify the move away from prototype production to building fighters for actual military use.

LRIP is the stage in the program where CAC will build enough production fighters (about 12-24) for test and evaluation flights by the PLAAF to understand the J-20's capabilities, before further committing to large-scale production. Initial operational capability should come around in the 2018-2019 timeframe, once the Chinese Test Flight Establishment (CTFE) regiment develops the technical proficiency and competence to use the J-20 to the fullest in combat operations.

Chinese Stealth Fighter J-20 Starts Production | Popular Science
 
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Chinese Stealth Fighter J-20 Starts Production | Popular Science

"'2101' is the ninth J-20 fighter built by the CAC in under five years (the first J-20 prototype flew in January 2011). In comparison, the first production F-35A (AF-6) flew in February 2011, five years after the first F-35 prototype flew in February 2006. The F-22 also took about five years to transition from first flight to LRIP (September 1997 and February 2002).
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While the J-20 certainly a formidable foe today, in the next several years of development advances, its capabilities can be expected to grow. Future J-20's will likely have super-cruise capable Chinese WS-15 turbofan engines and improved gallium nitride AESA radars, with further out options including pilot controlled UAVs. As J-20 testing wraps up, the PLAAF will also have many other new projects to roll out, like the J-31 stealth fighter, H-20 stealth bomber, Sharp Sword stealth UAV and hypersonic weaponry."

kFtlV8d.jpg
 
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IMO it will be difficult for anyone to convince me and maybe some others that the J-20 is powered by the AL-31F engines.

All I need to do is to close my eyes and listen to the sound of both the engines from the available videos e.g. J-10A or J11A powered by the AL-31 then the J-20 prototype. The J-20 powerplants are definitely more powerful and has a higher bypass. All the AL-31F has a characteristic higher pitch metallic engine sound.

Next an official from AVIC had already comfirmed that the J-20 is powered by China's own WS-10 series engine maybe WS-10G etc.
 
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J20.JPG


Beijing’s stealthy Chengdu J-20 fifth-generation combat aircraft, pictured above in an artist’s rendering, may have entered low rate initial production according to state-owned Chinese media.

Xinhua—Beijing’s official news agency—published photos of the newest J-20 aircraft, which is still coated in primer paint, earlier this week. An editorial accompanying the photos suggests that the new stealth warplane has entered initial production. Xinhua noted that the serial number is an indication of that fact, having changed from the 20XX designation of earlier iterations to 2101. But the news agency is careful not to definitively state the stealthy warplane has entered full production.

The earlier J-20 prototypes were designated as 2001, 2002, 2011 and 2017. Aircraft 2001 and 2002 were used as technology demonstrators while aircraft 2011 and 2017 were production configuration flight-test articles, Xinhua noted. The aircraft’s configuration has remained stable over the past two iterations—which indicates that the design works relatively well.

According to Xinhua, the Chinese believe that the J-20 will be stealthier than its Russian Sukhoi T-50 PAK-FA counterpart. The Chinese aircraft might also be ahead of the Russian jet in terms of avionics, but concrete information about the new warplane’s systems is scarce. The J-20 is also likely to become fully operational ahead of Moscow’s offering. However, Beijing seems to be aware of its shortcomings—Xinhua notes that the J-20 is optimized for supersonic cruising speeds but is limited by imported Russian engines.

The news agency notes that the J-20 won’t be able to reach its full potential until China develops engines with a thrust-to-weight ratio of ten-to-one. That means Beijing is aware it needs to develop jet engines that are on par with the Pratt & Whitney F119 and F135, which are installed on the Lockheed Martin F-22 Raptor and F-35 Joint Strike Fighter respectively. China is working on developing its own jet engines, but thus far, its efforts have fallen short.

China recently concluded a deal to purchase two-dozen advanced Sukhoi Su-35SFlanker-E fighters from Russia, which are equipped with a pair of powerful NPO Saturn AL-41F1S afterburning turbofans. China may hope to harvest the technology from the AL-41F1S to further its own engine development, however the new Russian engine—which is an upgraded development of the earlier AL-31F—has proven to be less than satisfactory for Moscow’s own PAK-FA development. The Russians are pursuing a new engine tentatively called izdeliye30 for installation on a future PAK-FA production standard aircraft as a solution to the problem. Thus, it is unclear if the AL-41F1S will solve Beijing’s engine woes—but it might mitigate some of its problems.

Even without new engines, the addition of the J-20 should significantly boost the capabilities of China’s air force. It’s not clear that the J-20 is an air superiority fighter—rather it might be specifically designed to eliminate support aircraft like tankers and intelligence, surveillance and reconnaissance aircraft like the AWACS that enable U.S. air operations over the Western Pacific. It might also have a maritime strike role as part of Beijing’s anti-access/area-denial strategy. The lack of supersonic cruise capability might hinder the J-20 in that role, but there is a good chance it still poses a significant threat even as is.

Dave Majumdar is the defense editor for the National Interest. You can follow him on Twitter: @davemajumdar.

Image: Wikimedia Commons/Alexandr Chechin.
 
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The 117S got nothing to do with the J-20, since China's state media has already denied it.

BTW, because China is too quiet and in low profile, the western media is always taking this advantage to badmouth about China's weapons.
 
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The 117S got nothing to do with the J-20, since China's state media has already denied it.

BTW, because China is too quiet and in low profile, the western media is always taking this advantage to badmouth about China's weapons.
So now How you would you rate latest prototype of J-20 when compared to F-22 and F-35 ?
 
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The 117S got nothing to do with the J-20, since China's state media has already denied it.

BTW, because China is too quiet and in low profile, the western media is always taking this advantage to badmouth about China's weapons.


Not sure if indeed already confirmed and regarding "sound" IMO it is even more a hint for the same "screaming" sound of an AL-31 .... anyway, here's an interesting image:

J-20 ontop of RCS test stand - 9.15.jpg
 
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PS: by the way ... there are so many even contradicting versions on what engine the J-20 uses given via official media - isn't Xinhua.net not an "official" one ? - that I have the feeling that these reporters are simply as clueless as we are here. They don't get their manual from the PLAAF or CAC to "inform" the world what's going on ... they just do their research on their own and some say this while others that.
 
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since the forum dont support prediction prophecies without concrete evidence, lets just wait for it from official chinese gov :china:
 
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