Official Chengdu J-20 Discussion Thread

MiG-23MLD

Banned Member
Wouldn't the lack of tails (on the YF-23) easily be able to be compensated by FBW?

And are you saying that canards are un-stealthy compared to tails or just unstealthy in general? You sound like you know quite a bit about that so can you elaborate a little on the subject?
(Also I just want to point out the Northrop grumman proposal for the NATF had canards as did one of the submissions for JSF design. So there must be a fairly easy way to set off the detrimental effects of canards to stealth. The USAF and RuAF didn't go for canards was simply that they were more familiar towards conventional layouts and therefore were the safer option)
Canards are not bad but are not the only solution or the only way to get agility.
Canards can be high aspect or low aspect , stealthy canards are usualy low aspect.
their shape influences the aerodynamics and their radar deflection and these too are not always in harmony.
A canard on a stealth aircraft is not an impossibity but it is not a superior feature over one with a tailplanes.
The final configuration will be mission dependant, the T-50 chose agility over other features.
Canards are good depending in the mission profile and flight envelope.
 

Feanor

Super Moderator
Staff member
Some posters are saying the prototype's using 117S engines actually. I'm not sure if it's just groundless proclamations or not though.

Hopefully WS-15 will be ready by the 2017-2019 mark. At least Shenyang Liming isn't heading WS-15 this time...
Not likely. The 117S has barely started serial production, with the first few Su-35S to be handed over late next year (est.) How would China have the new engine?

I'm not keeping my fingers crossed for the WS-15. You need years of operating experience with a new engine, improvements, modernizations, etc. before you can move on to the next generation. The WS-10A, if we believe that their manufacturing is now able to provide them with sufficient quantities, and with sufficient reliability, will only now become their main engine. It will be a long time before a radical breakthrough can be achieved.
 

dingyibvs

New Member
Not likely. The 117S has barely started serial production, with the first few Su-35S to be handed over late next year (est.) How would China have the new engine?

I'm not keeping my fingers crossed for the WS-15. You need years of operating experience with a new engine, improvements, modernizations, etc. before you can move on to the next generation. The WS-10A, if we believe that their manufacturing is now able to provide them with sufficient quantities, and with sufficient reliability, will only now become their main engine. It will be a long time before a radical breakthrough can be achieved.
True, the WS-15 will probably take at least a decade before it'll be ready. However, I think it's possible that the Russians could've spared a couple of 117S's for China for testing purposes.
 

Feanor

Super Moderator
Staff member
True, the WS-15 will probably take at least a decade before it'll be ready. However, I think it's possible that the Russians could've spared a couple of 117S's for China for testing purposes.
Not likely at all. It's not a matter of availability, it's a matter of it being new technology. Not something Russia is eager to share.
 

dingyibvs

New Member
Not likely at all. It's not a matter of availability, it's a matter of it being new technology. Not something Russia is eager to share.
I see, so what do you think is powering the JXX? The nozzle doesn't look like the AL-31 and it doesn't seem too much like the WS-10 either. Maybe we'll be able to tell if we have clearer pictures.
 

Feanor

Super Moderator
Staff member
I see, so what do you think is powering the JXX? The nozzle doesn't look like the AL-31 and it doesn't seem too much like the WS-10 either. Maybe we'll be able to tell if we have clearer pictures.
I don't know. I'm not an expert on Chinese military hardware by any means. But I'll be very much surprised if it turns out to be the 117S.
 

MiG-23MLD

Banned Member
It is interesting the waythe news have taken the J-20 pictures most of them say it might be a fake

see

Half the fun of such sightings is trying to determine if they are real, or simply Photoshopped fighters created on computer screens. If you think it may be real, you try to figure out its utility -- and how other air forces might counter it. "Why would China need or want a short-range stealth aircraft?" asks Bill Sweetman of Aviation Week, a pre-eminent new-plane hunter. "Any targets with defenses that call for that capability are a long way from the mainland."



The U.S. flew its first stealth prototypes — the YF-22 and rival YF-23 — in 1990. Have the Chinese caught up? There are blurry pictures of the Chinese J-20 jet-fighter floating around. Some think the pictures are fake, others think that the pictures are real and have been pulled. Some analysts think that the pictures could be the products of a Chinese government misinformation campaign.

 

Blitzo

New Member
It is interesting the waythe news have taken the J-20 pictures most of them say it might be a fake

see

Half the fun of such sightings is trying to determine if they are real, or simply Photoshopped fighters created on computer screens. If you think it may be real, you try to figure out its utility -- and how other air forces might counter it. "Why would China need or want a short-range stealth aircraft?" asks Bill Sweetman of Aviation Week, a pre-eminent new-plane hunter. "Any targets with defenses that call for that capability are a long way from the mainland."



The U.S. flew its first stealth prototypes — the YF-22 and rival YF-23 — in 1990. Have the Chinese caught up? There are blurry pictures of the Chinese J-20 jet-fighter floating around. Some think the pictures are fake, others think that the pictures are real and have been pulled. Some analysts think that the pictures could be the products of a Chinese government misinformation campaign.

I wouldnt' call it interesting -- rather, "predictable" is a better word.

I love how they say "The Chinese J-20 seems to combine the front fuselage of the U.S. Air Force’s F-22 with the back half of Russia’s T-50 stealth prototype." while not mentioning the canards at all.
Why not mention the canards?
Oh right because then no other 5th generation jet has used them and it would challenge our belief that the Chicoms copy everything.

What will be interesting is whether the pentagon tries to dumb down the J-XX (like they did when the PAK FA first came out), or if they try to use it for further military spending.

The idea that it is a misinformation campaign has a few big holes in it -- the largest being that China never likes to "show off" their newest military developments. Why try to make the world think they have a 5th gen jet if they actually don't?

Also, one of the articles say, "the J-20 hasn’t even flown yet. It took 15 years for the F-22 to enter front-line service; considering China’s quality-control problems with high technology, it could take a decade or more for the J-20 to appear in numbers that make any difference in the Pacific balance of power."

The F-22 was in the immediate post cold war environment and it's faced a few political challenges over the years whereas the J-20 is in a slightly better political position at the moment.
I think "a decade or less for the J-20 to appear in numbers that make any difference" would be a more accurate statement.

The PLAAF general He Weirong last year said the 4th gen fighter would come in service between 2017-2019 and I'd stick with it.
My projection is IOC with non WS-15 around 2015, and IOC with WS-15 in the 2017-2019 mark.
 

weasel1962

New Member
Re:

About the only fairly conclusive comment I can pass is that it's a big bugger isn't it?
Estimates give it ~70 ft which makes it only ~10% larger than the F-22 or roughly equal to a B-2 in terms of length.

Ironically, 70 ft is shorter than a Su-30 so all Suks are big buggers by the same definition.

And the point that has been made so many times in this forum is that size has little bearing on radar stealth.
 

MiG-23MLD

Banned Member
I wouldnt' call it interesting -- rather, "predictable" is a better word.

I love how they say "The Chinese J-20 seems to combine the front fuselage of the U.S. Air Force’s F-22 with the back half of Russia’s T-50 stealth prototype." while not mentioning the canards at all.
Why not mention the canards?
Oh right because then no other 5th generation jet has used them and it would challenge our belief that the Chicoms copy everything.

What will be interesting is whether the pentagon tries to dumb down the J-XX (like they did when the PAK FA first came out), or if they try to use it for further military spending.

The idea that it is a misinformation campaign has a few big holes in it -- the largest being that China never likes to "show off" their newest military developments. Why try to make the world think they have a 5th gen jet if they actually don't?

Also, one of the articles say, "the J-20 hasn’t even flown yet. It took 15 years for the F-22 to enter front-line service; considering China’s quality-control problems with high technology, it could take a decade or more for the J-20 to appear in numbers that make any difference in the Pacific balance of power."

The F-22 was in the immediate post cold war environment and it's faced a few political challenges over the years whereas the J-20 is in a slightly better political position at the moment.
I think "a decade or less for the J-20 to appear in numbers that make any difference" would be a more accurate statement.

The PLAAF general He Weirong last year said the 4th gen fighter would come in service between 2017-2019 and I'd stick with it.
My projection is IOC with non WS-15 around 2015, and IOC with WS-15 in the 2017-2019 mark.
I will be very honest with you i do not if it is true or not a real fighter, i was just trying to point point out that the first news on the internet that talk about the J-20 do not mention a real fighter but a probable real picture in these days of advanced computers the picture can be a fake, first it is not clear and even modern cell phones cameras have excellent quality, second sounds really unreal that the Chinese do not search the plane watchers near the runway, it is far cheaper to put guards and check the plane watchers than trying to censor the internet.
I have not seen even news on RIA novosti or statements by the USAF at this moment just a Time magazine saying it might be a fake but perhaps it is real.
At this moment i guess Time magazine does not want to claim something that later might need to deny.
Only time will tell because nothing hidden can remain hidden and by the way the USAF has satellites and is very easy for them to use the satellites and confirm the existance of the J-20 specially on a clear day as it is shown on the pictures.
So far the USAF and US government have remain silent and it is just at this moment a pure internet gossip nothing official niether by the Chinese or Americans.
 

Blitzo

New Member
I will be very honest with you i do not if it is true or not a real fighter, i was just trying to point point out that the first news on the internet that talk about the J-20 do not mention a real fighter but a probable real picture in these days of advanced computers the picture can be a fake, first it is not clear and even modern cell phones cameras have excellent quality, second sounds really unreal that the Chinese do not search the plane watchers near the runway, it is far cheaper to put guards and check the plane watchers than trying to censor the internet.
I have not seen even news on RIA novosti or statements by the USAF at this moment just a Time magazine saying it might be a fake but perhaps it is real.
At this moment i guess Time magazine does not want to claim something that later might need to deny.
Only time will tell because nothing hidden can remain hidden and by the way the USAF has satellites and is very easy for them to use the satellites and confirm the existance of the J-20 specially on a clear day as it is shown on the pictures.
So far the USAF and US government has remain silent and it is just at this moment a pure internet gossip nothing official niether by the Chinese or Americans.
Yeah sorry lol I was only annoyed with the articles really.

I don't think the US will be commenting on this for a while because they only really give out statements once they have "official" confirmation from the other side (think when PAK FA first came out -- they gave a response to that very fast, because the russians were officially condoning its release).
China, and the PLAAF on the other hand prefer to leak out some photos slowly. They know they can't keep it under wraps forever, so they just censor the early photos which reveal too much, before slowly easing down a little.

Also, I don' tthink the US really expected China to come out so early with their own 4th/5th gen fighter (hell, even I thought it would take another year to get the kind of pictures we're seeing now) -- they expected the Russians with the PAK FA for years, but everything was so quiet on the J-XX front I think they kind of assumed the development was going very slow and so now they're caught off guard.

Some of the plane watchers are plain clothes policemen, and (supposedly) allow civilians to watch as long as they don't take pictures. But obviously some will always get away with mobile phone cameras. I also feel the PLAAF don't want to crack down on photos too much because they know there is a public support for them, and giving out a few unofficial photos lets them garner more support.

With the sheer amount of pictures (about twelve now) of the J-20, and with posters like huitong updating his page with them, and people like bill sweetman on aviation week posting on this... Well it's hard to claim they're all fakes or PS's, even with modern computer technology.
 

MiG-23MLD

Banned Member
Yeah sorry lol I was only annoyed with the articles really.

I don't think the US will be commenting on this for a while because they only really give out statements once they have "official" confirmation from the other side (think when PAK FA first came out -- they gave a response to that very fast, because the russians were officially condoning its release).
China, and the PLAAF on the other hand prefer to leak out some photos slowly. They know they can't keep it under wraps forever, so they just censor the early photos which reveal too much, before slowly easing down a little.

Also, I don' tthink the US really expected China to come out so early with their own 4th/5th gen fighter (hell, even I thought it would take another year to get the kind of pictures we're seeing now) -- they expected the Russians with the PAK FA for years, but everything was so quiet on the J-XX front I think they kind of assumed the development was going very slow and so now they're caught off guard.

Some of the plane watchers are plain clothes policemen, and (supposedly) allow civilians to watch as long as they don't take pictures. But obviously some will always get away with mobile phone cameras. I also feel the PLAAF don't want to crack down on photos too much because they know there is a public support for them, and giving out a few unofficial photos lets them garner more support.

With the sheer amount of pictures (about twelve now) of the J-20, and with posters like huitong updating his page with them, and people like bill sweetman on aviation week posting on this... Well it's hard to claim they're all fakes or PS's, even with modern computer technology.
In my opinion i won`t believe it is a real fighter until i see news and statements by the USAF or Russian sources or a clear picture and a Chinese oficial statement, Russia and the US both nations have satellites and interest in knowing if China has or not a stealth fighter.

I see several incongruencies in the fighter picture and the fighter it self..
First my cell phone takes excellent pictures and is tiny, those pictures are horribly blur.
second is illogic the Chinese do not search the plane watchers just to later censor the pictures and use the pictures leaked as a PR exercise.

later the aircraft looks from the front an F-22 and from behind like the S-37 Berkut.
the US and Russia have satellites that easily can detect the fighter on the tarmac of Chengdu.
So far the Russians have not said anything official.

The fighter has ventral fins which at least from the angle view of the pictures do not have the same angle of the fins, the canards have another angle with respect the engine nacelles reflecting a poor treatement for stealth, the canards tailplanes and wings in all the rest of stealth fighters are aligned on the same horizontal plane to keep a radar reflection on the same direction and same angle.
It has round nozzles, reflecting poor stealth at the end of the aircraft.

So with blur pictures it is hard for me to tell if it is a real aircraft.
If it is well sooner or later we will know, if it is well i guess it is more like a technology demostrator but it shows still not a mature design and more the product of the imagination of fans and possible CG image that is these days is not so hard to make even at different angles since many programs use 3D to create images.
 

weasel1962

New Member
Re:

If one considers development of the J-10, it took ~13 years before they got their first test flight.

Either China started this program very early or the development may have been hasten with external assistance eg Russia. Not surprising the latter if engine used are russki.

Having said that, too early to say whether J-XX is actually a stealth a/c or 5th gen and could merely be an improvement of legacy warfare capabilities. There are stealth features such as the canted tail, clean design but it could be a F-15SE wanabe rather than a true stealth fighter.
 

wp2000

Member
China started her next gen fighter preliminary design (bidding) process in 1990. It's just that only in recent years that people start to believe its existence.
 

Marc 1

Defense Professional
Verified Defense Pro
Estimates give it ~70 ft which makes it only ~10% larger than the F-22 or roughly equal to a B-2 in terms of length.

Ironically, 70 ft is shorter than a Su-30 so all Suks are big buggers by the same definition.

And the point that has been made so many times in this forum is that size has little bearing on radar stealth.
Well aware that size doesn't have anything to do with RCS, not dopey enough to make that connection.

The real point to my post is despite all of the speculation about engines/weapons fit /RCS etc, the ONLY definitive thing I can see is that its a big bugger. The truth will eventually come out - all the speculation in the world isn't going to help and usually ends up confusing people.
 

Blitzo

New Member
If one considers development of the J-10, it took ~13 years before they got their first test flight.

Either China started this program very early or the development may have been hasten with external assistance eg Russia. Not surprising the latter if engine used are russki.

Having said that, too early to say whether J-XX is actually a stealth a/c or 5th gen and could merely be an improvement of legacy warfare capabilities. There are stealth features such as the canted tail, clean design but it could be a F-15SE wanabe rather than a true stealth fighter.
Yeah some people are saying the first flight will be happening very soon (like a day or two/a week, kind of soon). Of course I can't really back up this statement but all the chatter suggests a flight around the new year.


In my opinion i won`t believe it is a real fighter until i see news and statements by the USAF or Russian sources or a clear picture and a Chinese oficial statement, Russia and the US both nations have satellites and interest in knowing if China has or not a stealth fighter.
Fair enough I suppose, though you'll be in a long wait for China to confirm the J-20's existence. They only declassified the J-10 like a year or two after it acheived IOC.

I see several incongruencies in the fighter picture and the fighter it self..
First my cell phone takes excellent pictures and is tiny, those pictures are horribly blur.
second is illogic the Chinese do not search the plane watchers just to later censor the pictures and use the pictures leaked as a PR exercise.
Some pictures are excellent while some are very cr*ppy. Pictures are all over Sinodefence forum, china defence forum and the key aviation forums -- go take a look at all of them.

Here's a few to start you off:
http://cnair.top81.cn/fighter/J-20a.jpg
http://cnair.top81.cn/fighter/J-20.jpg
http://img.fyjs.cn/Mon_1012/27_103597_d3e405fe9d25ca1.jpg

later the aircraft looks from the front an F-22 and from behind like the S-37 Berkut.
the US and Russia have satellites that easily can detect the fighter on the tarmac of Chengdu.
So far the Russians have not said anything official.
No offence, but if you're waiting for Russian confirmation of the J-20... well they're the last people you should go to for PLA related news. Let's leave it at that.

And as for the F-22 and Berkut similarities -- the canopy and nose resemble the F-22 (but the pitot probe is in a position more like the F-35 prototypes), and the J-20's tails are canted way back and are all moving which are more similar to the F-117's. There have been pictures taken from so many angles now I'd say it's impossible for anyone to PS elements from all those aircraft into such a convincing, real picture over and over again in so many angles and environments and light shades.

The fighter has ventral fins which at least from the angle view of the pictures do not have the same angle of the fins, the canards have another angle with respect the engine nacelles reflecting a poor treatement for stealth, the canards tailplanes and wings in all the rest of stealth fighters are aligned on the same horizontal plane to keep a radar reflection on the same direction and same angle.
Yeah, edge alignment I know -- but unless we get a clear picture of the plane from the top or bottom it's far too early to be commenting about how well the alignment goes for stealth.

It has round nozzles, reflecting poor stealth at the end of the aircraft.
Yeah but the rest of it seems alright. Besides PAK FA has round nozzles too, and these engines aren't the final WS-15 either (though by the sounds of things they'll be going for a conventionally shaped, 3D TVC nozzle for WS-15 so the current rear end may look similar to the final thing).

So with blur pictures it is hard for me to tell if it is a real aircraft.
If it is well sooner or later we will know, if it is well i guess it is more like a technology demostrator but it shows still not a mature design and more the product of the imagination of fans and possible CG image that is these days is not so hard to make even at different angles since many programs use 3D to create images.
(Forgive me if I sound frustrated)

Technology demonstrator?? Like what, the YF-22 or YF-23? Or may Su-47 and Mig 1.44? They wouldn't be putting that fancy paint scheme and inviting all the heads of state, previosu company bosses and such to come over if it were just that. And all the chatter points to this being a prototype, and nothing being mentioned of it a tech demonstrator.

This is the J-20 prototype as much as... the current PAK FA prototypes are prototypes. Phew.

The whole CG/photoshop idea (in terms of if the pictures are real) is reasonable considering how many cruddy photoshops we've seen over the years. But with all these angles and environment's we're getting the plane from.... well no person would go to such lengths.

Do you remember when the J-10B pictures first came out almost two years ago? Everyone was screaming that it was a photoshop (and me too, initially). People pointed out inconsistencies in colour, blurriness and what not but now it's accepted fact.
 

dingyibvs

New Member
All the major Chinese message boards have members parked outside of CAC doing live updates for them. If this thing isn't real, then it's the biggest and most elaborate scam I have ever seen.
 
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