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New photos, we can see J-7BGI and J-20, 3 generations of difference...
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Utter garbage. The T/R modules as an array is no different in operation than the classical dish or the newer planar: Transmit and Receive. That mean the word 'Therefore' is misleading. The radome must be a 'pass through' device to some degree. It is not the paint that must be transparent, although the ingredients that made up the paint can contain some trace metallic elements and this could interfere with transmission. Rather, these are the items that determine the color of the radome that so often different from the aircraft:1. We know for a fact that an AESA radar has transmit and receive modules. Therefore, the paint on the J-20 radome must be transparent to X-band radar waves for both emission and reception.
This is hilarious and I got people, from Nellis to Hill, yucking themselves silly.2. If the radome paint is transparent in X-band then how does the J-20 stay stealthy in light of enemy X-band radar? Wouldn't enemy X-band radar pass through the transparent radome paint and composite nose to strike and reflect off of the interior AESA radar? The obvious solution is to have interior retractable panels coated with RAM.
Think of it this way. Divide the J-20 nose into four sections. Place four equal-sized RAM-coated panels underneath the radome. When the J-20 is in stealth mode, the interior RAM-coated panels are flush against the inside of the radome walls.
Incoming radar will penetrate the radome paint and composite walls. The enemy X-band radar will strike the RAM-coated interior panel and be absorbed. Hence, the J-20 remains stealthy.
When the J-20 is in search or attack mode, the four interior RAM-coated radome panels are hydraulically moved backwards. This allows the J-20 AESA radar to emit and receive X-band radar waves. If the J-20 pilot wants to shift back into stealth mode, the RAM-coated panels are hydraulically moved back into place against the composite radome walls and the fighter is stealthy once again.
There is a near equal solution and one that REAL engineers, including the Chinese ones for the J-20, know: Frequency Selective Surfaces.3. However, the most elegant solution is to have a radome paint composed of "phase change material" (PCM). I just don't know if the material currently exists to permit switching back-and-forth between transparency and opaqueness to X-band radar waves. Basically, I'm looking for a material where I can run an electric current through it to change its optical property with respect to X-band radar.
The above source have illustrations for those geometric patterns and yes, those are PHYSICAL structures in a thin film designed to alter the travel path of a radar signal INSIDE the material. Each structure, from a length of simple wire to the more complex Jerusalem Cross produces an effect, electrical and/or magnetic, upon the radar signal. We can LAYER these sheets into much more complex FSS to allow near complete 'pass through' in one direction and near complete blockage in the opposite direction. Some of the more complex designs are active, meaning electrically excited at will, that can be %100 'pass through' in one direction and %100 blockage in the opposite direction.The term circuit analog (CA) for such absorbers is derived from the fact that the geometrical patterns are often defined in terms of their effective resistance, capacitance, and inductance; and then equivalent circuit techniques are used in the subsequent analysis and design of the resulting absorber.
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How?Bumbit is back!
The J-20 is better than the F-22.
The J-31 is better than the F-35.
Got proof that the J-20 isn't too?Unlike the F-22, our fighters don't starve the pilot of oxygen.
Carlo Kopp contradicts himself in his conclusions.And the F-35, Carlo Kopp has shredded that fighter to bits.
No $h!t.The F-35 is not even stealth, it's basically an upgraded F-16.
New photos, we can see J-7BGI and J-20, 3 generations of difference...
this is the closest Bangladesh will get to a 5th generation craft for a loooooooooooong time.
Sure. The J-31 is a copy of the F-22. Now please do not insult the intelligence of the readers by pointing out differences in details.Gambit,
Tell us what you think about the J-31. We're all waiting for your expert opinion.
Sure. The J-31 is a copy of the F-22. Now please do not insult the intelligence of the readers by pointing out differences in details.
Yeah...One loss out of 850 sorties. How about the fact that the PLA predicted Desert Storm would result in tens of thousands of US casualties and had to withdraw that report/prediction with eggs on the generals' faces?Sorry but we don't copy failed fighters like the F-22. Unlike the F-22 we want our pilot to get oxygen. Very important thing you know, didn't they teach you those things when you make your so called 'stealth' fighters.
Don't insult 5th generation fighters like the J-31 and J-20 by comparing it to 4.5 generation fighters like F-35 and the pilot killer F-22.
We all know how American 'stealth' fighters turn out.....getting shot down over Serbia (F-117) by soviet anti-aircraft.
Oh yes I'm sure American propaganda departments have brainwashed the gullible American public into believing the pilot lost control right? Oh sure it did Anything to coverup the humiliation to the American airforce.
Sure. The J-31 is a copy of the F-22. Now please do not insult the intelligence of the readers by pointing out differences in details.