J-20 5th Generation Fighter VII

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latenlazy

Brigadier
don't get me wrong, appreciate you provide the source, and I agree this might be the closest we could get atm in terms of the references.

But still, we could measure slightly better than this, based on the angle differences the J-16 is opened, the center of the picture in Y-axis is roughly aliasing withe the left intake of the J-16 in the middle, I don't want to measure exactly how many pixels that is but let's just say roughly 10% may occur, so the average error in width is roughly 1-2% + pixel error for a quick estimation from your measurement, and that's assuming you are using the J-20 in the middle...

To do a more precise estimation, we could roughly reverse out the height of the camera using the same idea above, and this is Step 1.

For Step 2, we need the original picture (if I'm not wrong this is a cut from a larger picture) with ISO and other information of the picture (I have DJI Mavic myself, the lens is definitely more a fisheye, so boundary stretch is big).

But assuming the X and Y axis has the same angel error (unlike, but...), and ignoring the lens stretching, for now, based on the rough length/width estimation, you might looking for a 2-4% or even 6% error in length... that's from 20.04 to 20.46 after the error compensation.

But of course, this is a very quick estimation here, and I'm not sure exactly how many % the error exactly is, just think it should be slightly more accurate the 20.88 you got from raw pixel measurement.



yes, but the stretching and angle error on two jets are still different, not exactly useful to say...
You can use the multiple J-16s to adjust for lens stretch in theory. May need a pretty advanced piece of software to adjust the image to normalize spatial dimensions using three fixed size objects though.
 

Phead128

Captain
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How can Rafale, a platform that was introduced in 2001? even with marginal upgrades, can be more advanced than J-20 which was introduced in 2017?

That's almost two decades difference, whereas there is limits to what France can upgrade in a frame, whereas China has the luxury of reinventing the frame to accommodate newest/latest technology including future upgrades.
 

Figaro

Senior Member
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How can Rafale, a platform that was introduced in 2001? even with marginal upgrades, can be more advanced than J-20 which was introduced in 2017?

That's almost two decades difference, whereas there is limits to what France can upgrade in a frame, whereas China has the luxury of reinventing the frame to accommodate newest/latest technology including future upgrades.
Remember this is coming from the same group of people who believe they can fight a 2.5 front war against China and Pakistan ...
 

stannislas

Junior Member
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You can use the multiple J-16s to adjust for lens stretch in theory. May need a pretty advanced piece of software to adjust the image to normalize spatial dimensions using three fixed size objects though.
you are right, but like what I said, given a rough estimation over the number @Inst claimed according to the pixel counting should give a length closer to the real thing... but still an estimation
 

siegecrossbow

General
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Any idea what is Rafale CRS? With majority cost of the unit coming from their radar evading SPECTRA, India is sure that thier Rafale already "proven" to have beaten F-22 and J-20 will be the same.

There are actually many RCS reduction measures incorporated into the Rafale including sawtooth patterning on aircraft skin, planform alignment of canard and wings, and S-shaped air-duct. According to engineers at Dassault they can actually achieve 0.01m^2 at select angles. However, this is frontal RCS of a naked aircraft. Once it starts carrying external load then the RCS size will balloon exponentially. This is why true fifth gen fighters pay the weight and structural penalties for internal weapons bay.
 

ZeEa5KPul

Colonel
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There are actually many RCS reduction measures incorporated into the Rafale including sawtooth patterning on aircraft skin, planform alignment of canard and wings, and S-shaped air-duct. According to engineers at Dassault they can actually achieve 0.01m^2 at select angles. However, this is frontal RCS of a naked aircraft. Once it starts carrying external load then the RCS size will balloon exponentially. This is why true fifth gen fighters pay the weight and structural penalties for internal weapons bay.
I've actually taken a look at some pictures of the Rafale from some representative angles, and it indeed seems to use some of the stealth-shaping techniques of the J-20. I just eyeballed it, but it appears that the leading edges of the wings and canards are aligned, while the trailing edges are counteraligned. However, there are significant ways that the plane deviates from sound RCS minimizing principles: the canard roots and wing do not lie on the same plane, and the plane has a single straight tail. As you mentioned, external weapons carriage is also a severe limitation.

So, essentially a gimped J-20 planform.
 

Blitzo

Lieutenant General
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There are actually many RCS reduction measures incorporated into the Rafale including sawtooth patterning on aircraft skin, planform alignment of canard and wings, and S-shaped air-duct. According to engineers at Dassault they can actually achieve 0.01m^2 at select angles. However, this is frontal RCS of a naked aircraft. Once it starts carrying external load then the RCS size will balloon exponentially. This is why true fifth gen fighters pay the weight and structural penalties for internal weapons bay.

I've actually taken a look at some pictures of the Rafale from some representative angles, and it indeed seems to use some of the stealth-shaping techniques of the J-20. I just eyeballed it, but it appears that the leading edges of the wings and canards are aligned, while the trailing edges are counteraligned. However, there are significant ways that the plane deviates from sound RCS minimizing principles: the canard roots and wing do not lie on the same plane, and the plane has a single straight tail. As you mentioned, external weapons carriage is also a severe limitation.

So, essentially a gimped J-20 planform.


I commend your explanations for why a 4+ generation airframe's RCS reduction measures simply cannot compare to a proper 5th generation aircraft, but at the same time, the sheer extent of news media (mostly Indian) that have touted the Rafale as the descent of a diety makes it a bit hard to refute the sheer degree of conviction that their tabloids have been pushing.

I kid you not, the below is just one example from
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lS7xWBj.jpg



====

I have a feeling we might get a large amount of people reading such articles and similar in terms of "comparing" Rafale with J-20 in coming days and weeks, so it might be a good idea to know where the basis and reasoning of some of these questions might come from..


Note, I write this post specifically because I don't want this thread to turn into a Rafale and J-20 comparison thread o_O
 

Phead128

Captain
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Moderator - World Affairs
I guess Rafales are so good compared to J-20s, India does not need to develop AMCA or purchase Su-57MKIs anymore. :cool:

India hits two birds with one stone, air superiority NOW and well into the 2030s-2040s. Why bother with 5th gen when Rafale can do the job!

Don't stop the enemy from blundering into overconfidence/hubris. (maybe Sun Tzu said this)
 

siegecrossbow

General
Staff member
Super Moderator
I commend your explanations for why a 4+ generation airframe's RCS reduction measures simply cannot compare to a proper 5th generation aircraft, but at the same time, the sheer extent of news media (mostly Indian) that have touted the Rafale as the descent of a diety makes it a bit hard to refute the sheer degree of conviction that their tabloids have been pushing.

I kid you not, the below is just one example from
Please, Log in or Register to view URLs content!


lS7xWBj.jpg



====

I have a feeling we might get a large amount of people reading such articles and similar in terms of "comparing" Rafale with J-20 in coming days and weeks, so it might be a good idea to know where the basis and reasoning of some of these questions might come from..


Note, I write this post specifically because I don't want this thread to turn into a Rafale and J-20 comparison thread o_O

I actually am not too upset about people ragging on the J-20. To attack it with such vehement dismissal means that it is worth attacking in the first place. No one would, for instance, compare a J-8 with the Rafale in the first place. The fact that they are even bringing up the J-20 is testament to its success.

I also get a lot of F-35 vibes from all the Indian media hatred. Reminds me of how Carlo Kopp kept on ragging on it the early 2010s.

Finally, it is just the nature of Indian media to brag about whatever acquisition they made. The religious fervor they are devoting to the Rafale is mind boggling. However I don’t doubt that they would’ve showered the FGFA with praises had that deal gone through. Nowadays a lot of Indians are actually insulting Russian military hardware. I wonder what would happen if Rafale doesn’t live up to their expectations in the next conflict.
 
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