J-20... The New Generation Fighter II

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EDIATH

Junior Member
That actually isn't far off. If equipped with a 4000x4000 pixel image of say, a F-22 raptor, you can measure the approximate angles of it's shaping, which is what Kopp claimed the Chinese did in the first place. Not to mention the Chinese probably took some know-how from that former B-2 engineer that they bought plans from.

But the question is, what's the point to mimic the exact angles from a F-22 photo since they have been testing models in labs (simulating radar wave transmissions and stuff) for decades? You don't seriouly believe someone would simply copy such a sophisticated design feature without testing its functionalities? Then all those testings should yield pretty much the same result since there're only a few bands applicable for radars on modern fighters. Let's face it, stealth design of an aircraft's shape is achieved through try & error, it's the method of testing that counts, unlike some sort of magical formula in chemistry, one can be inspired by another but simply copying another shape is out of the question.

Another example is DSI inlet, surely the LM team behind F-35 came up with it first. Afterwards designers at CAC decided to follow up with the study, but only after they went through all of the necessary calculations about how the airflow being affected by this design before they implement it on their own product. Photos of F-35 are available for every designer to reference on, how come only those at CAC manage to learn the trick? Because it's a complex studying process, not a simple copy & paste job.
 

Schumacher

Senior Member
Your blog was about, oh, 9,000 times better than the crap that Carlo Kopp posted:

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"The accuracy with which the Chengdu engineers replicated key shaping features could be explained by their reverse engineering the design rules from high resolution imagery of US aircraft."

And I thought I was an unqualified armchair general. LoL.

LOL I bet Pentagon is now regretting they let Hollywood use F22 in Transformers and Iron Man etc. F22's secrets has all been leaked to China. To add salt to injury, maybe Chinese scientists even used pirated copies of the movies to gain all the F22 technologies.
 

kroko

Senior Member
As I understand it, regarding the PAK-FA's engine fan's, it should be quite obvious that those aren't the engines they're using. Also, you should be careful when you're referring to the PAK-FA, as it's completely different from the production variant (T-50), as PAK-FAs are just here for testing and aren't designed for stealth, not yet.

Yes, those are the engines that they are using. And what do you mean by "completly different"? redesigning the entire plane? then whats the point of unveiling the plane with such a pomp (including putin)?

It's also believed to utilize Active Camouflage, which would essentially make it invisible to "our lightwaves" (although active camouflage studies in the Private sector hasn't been doing that well...the Bird of Prey was a black program and did receive many mullahs.)

This tech is being investigated, but if you think warplanes will get them in our lifetime your totally wrong.

That actually isn't far off. If equipped with a 4000x4000 pixel image of say, a F-22 raptor, you can measure the approximate angles of it's shaping, which is what Kopp claimed the Chinese did in the first place. Not to mention the Chinese probably took some know-how from that former B-2 engineer that they bought plans from.
lol
 

siegecrossbow

General
Staff member
Super Moderator
LOL I bet Pentagon is now regretting they let Hollywood use F22 in Transformers and Iron Man etc. F22's secrets has all been leaked to China. To add salt to injury, maybe Chinese scientists even used pirated copies of the movies to gain all the F22 technologies.

Yes some people are just desperate enough to believe this bullock. What China must do is to get ahead in the weapons development game and give them a nice hard slap in the face.
 

Hyperwarp

Captain
Oh wow.....The sarrated/zig-zag edge issues :

Stealth A/C by Lockheed-Martin contain those type of edges. F-117, YF-22/F-22, F-35. But the edges reduced when they went from the YF-22 to the F-22

In contrast the Tacit Blue, B-2, YF-23, X-32, Bird of Prey, Boeing 6th Gen concept, X-36, X-45, X-47 etc, etc are much more curvy and has far less saw-tooth edges.

Despite losing the YF-23 and the X-32 were not said to be less stealthier than their rivals in the respective competitions. They lost due the other reasons.

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delft

Brigadier
But the question is, what's the point to mimic the exact angles from a F-22 photo since they have been testing models in labs (simulating radar wave transmissions and stuff) for decades? You don't seriouly believe someone would simply copy such a sophisticated design feature without testing its functionalities? Then all those testings should yield pretty much the same result since there're only a few bands applicable for radars on modern fighters. Let's face it, stealth design of an aircraft's shape is achieved through try & error, it's the method of testing that counts, unlike some sort of magical formula in chemistry, one can be inspired by another but simply copying another shape is out of the question.

Another example is DSI inlet, surely the LM team behind F-35 came up with it first. Afterwards designers at CAC decided to follow up with the study, but only after they went through all of the necessary calculations about how the airflow being affected by this design before they implement it on their own product. Photos of F-35 are available for every designer to reference on, how come only those at CAC manage to learn the trick? Because it's a complex studying process, not a simple copy & paste job.

You just can't make enough physical models and test them adequately. Why do you think China is building so many large super-computers?
 
LOL I bet Pentagon is now regretting they let Hollywood use F22 in Transformers and Iron Man etc. F22's secrets has all been leaked to China. To add salt to injury, maybe Chinese scientists even used pirated copies of the movies to gain all the F22 technologies.

The Chinese made a copy of their own all-spark and invited the decepticons over to help them out. Do you really think the Chinese can develop this type of stuff? That Pave Low in the movie was a Chinese agent trying to steal stealth technology.
 

bd popeye

The Last Jedi
VIP Professional
I guess a little humor never hurt anyone^^^.

Ok... what I'd like to know does anyone have any information about when the next flight testing of the J-20 will be? Everyone was so excited over the first public test. I'd sure like to know when another on shall occur.
 

siegecrossbow

General
Staff member
Super Moderator
I guess a little humor never hurt anyone^^^.

Ok... what I'd like to know does anyone have any information about when the next flight testing of the J-20 will be? Everyone was so excited over the first public test. I'd sure like to know when another on shall occur.

From what I've heard the next testflight will be a month from the first flight (maybe later). They need that time to analyse the data gathered from the first flight.
 

AssassinsMace

Lieutenant General
So was everyone just full of it? After the J-20 was revealed, there were those that said the J-20 and F-22 were old school and the F-35 and T-50 were advanced stealth designs. Yet everyone seems to still desire an F-22 over a F-35. All these stories are contradicting one another.
 
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