J-20 5th Gen Fighter Thread VIII

[Blitzo]

How accurate is Donald Canton on Quora? He said J20 is the most stealthiest jet in the world.

"The J-20 uses micro-metal structure stealth materials. This is a meta-material technology that is ahead of the US military's F35. This means that the J-20's stealth performance is the best in the world. When the J-20 patrolled the Chinese island of Taiwan and intercepted American fighter jets in the East China Sea, the J-20 was not detected by U.S. radars. Even when the U.S. fighter pilots could visually see the J-20, the radar of the U.S. early warning aircraft did not show the J-20, which was sufficient. It illustrates the stealth performance of the J-20.

According to U.S. Pacific Air Forces Commander Kenneth Wilsbach, the F-35 had a close encounter with China's J-20 stealth fighter jet in the East China Sea and found that the U.S. early warning radar could not see the J-20.

The J-20 has a higher radar cross-section (RCS) than the F-35. The J-20 has a triangular design and wide frame, which increases its RCS. However, the J-20 is equipped with radar-absorbing material and electronic countermeasures to reduce the likelihood of detection.

Those aren’t the Chinese claims but the American authority confessions.

The canards of the J-20 are not ordinary canards, but China’s original lifting body side-strip canard layout. In addition to the medium and low-altitude maneuverability of modern advanced fighter jets, fighter jets must also have supersonic cruise capabilities, as well as unconventional maneuverability capabilities such as over-stall speeds. Its aerodynamic layout must, on the premise of meeting the shape stealth constraints, reduce its supersonic drag as much as possible, improve the maximum lift characteristics and stability and controllability at large angles of attack, and take into account the sub-transonic lift-drag characteristics. There is some favorable coupling between the canards, front strakes and wings. The lift body layout of the wing-body fusion can use the fuselage to generate lift, increase internal volume and improve stealth characteristics at a small cost of drag.

The lifting body side-wing canard layout, excellent stealth structure and world-leading stealth materials are also important reasons why the J-20's stealth technology is unrivaled in the world.

In addition to stealth technology, China also leads the world in anti-stealth technology. The fourth-generation meter-wave anti-stealth radar technology is a global original. The reason why China is known as the only country with advanced anti-stealth meter-wave radar is that it can use a set of antennas to solve the problem of traditional meter-wave radar being unable to measure altitude and achieve precise three-coordinate positioning and tracking. Not only is it capable of detection, it is also capable of guiding fighter aircraft to intercept and even directly support fire control attacks."

Please, Log in or Register to view URLs content!

Ignore it.

 

[Schwerter_]

Actually the two possibilities are the same, both take kg (unit of mass) as kgf (unit of force). In the first possibility you are taking kg as kgf in order to convert.

4500kg is massive force, but the impact on the shooter may be small IF the impact time is very short, so the kinetic energy (F * T * D) can be small. So I agree, maybe there is no mistake.

I thought there’s a conversion factor of 9.81 between newtons and kgf?

 

[taxiya]

I thought there’s a conversion factor of 9.81 between newtons and kgf?

Yes. Are you confused?

I personally see 2 possibilities on it,
one being that the “4500kg” needs to be converted into newtons and that will show the actual amount of recoil “force”;
Converting 4500kg to newtons is 4500 * 9.81 = 44145 newtons. But it is still 4500kgf.

the other being that when they said “kg” there it actually means “kgf” or “kilogram force”. Just my own speculations though
This is saying that 4500kg is 4500kgf, same as above.

 

[ACuriousPLAFan]

Two J-20s photographed while escorting a Y-20 that was ferrying the 10th batch of remains of the Korean War PVA martyrs back to their homeland. #61225 (leading) and #61220 (wingman).

Posted by @太湖军I名 on Weibo.

 

[luosifen]

Two J-20s photographed while escorting a Y-20 that was ferrying the 10th batch of remains of the Korean War PVA martyrs back to their homeland. #61225 (leading) and #61220 (wingman).

Posted by @太湖军I名 on Weibo.

View attachment 121839

Here is the video of the flight with pilot names and Y-20 number:

 

[Atomicfrog]

Two J-20s photographed while escorting a Y-20 that was ferrying the 10th batch of remains of the Korean War PVA martyrs back to their homeland. #61225 (leading) and #61220 (wingman).

Posted by @太湖军I名 on Weibo.

View attachment 121839

Interesting to see that just a small angle change can make us miss the two big hexagonal overpressure outlets on the side of the intakes but also the lines betwwen panels.

A lot of good pictures are indeed needed to have a good representation of an aircraft...

 

[by78]

High-resolution images of J-20s escorting a Y-20 carrying remains of Korean War soldiers.

 

[Schwerter_]

Yes. Are you confused?

I personally see 2 possibilities on it,
one being that the “4500kg” needs to be converted into newtons and that will show the actual amount of recoil “force”;
Converting 4500kg to newtons is 4500 * 9.81 = 44145 newtons. But it is still 4500kgf.

the other being that when they said “kg” there it actually means “kgf” or “kilogram force”. Just my own speculations though
This is saying that 4500kg is 4500kgf, same as above.

Welp I stand corrected, thanks man

 

[ACuriousPLAFan]

J-20 chief engineer Yang Wei’s report on fighter jets at the academic exchange in conjunction of the 65th-anniversary of the Chinese Academy of Physics' establishment, a nuclear weapons production unit:

Please, Log in or Register to view URLs content!

https://twitter.com/i/web/status/1727856676483821863

Roughly translated:

Extract a few key points that I (@horobeyo on Twitter) think are key:
1. The generational division of fighter jets must be considered together with the weapons used
2. Thrust vectoring for the purpose of maneuverability is outdated in terms of thinking (Yang Wei revealed that the answer to "How did you know that the J-20 did not have a vector engine?" at the 2018 Zhuhai Exhibition was "a surprise at the air show" and "Mobility is king, this is not the battle that will be fought later.”)
3. There was once a misjudgment on the number of F-35s
4. The B-21 is completely aimed at China (combat radius/capability)

 

[TK3600]

J-20 chief engineer Yang Wei’s report on fighter jets at the academic exchange in conjunction of the 65th-anniversary of the Chinese Academy of Physics' establishment, a nuclear weapons production unit:

Please, Log in or Register to view URLs content!

https://twitter.com/i/web/status/1727856676483821863

Roughly translated:

I watched the video. Very amusing chief engineer is well aware of online community. He know phrases like "wall climbers". He also knows general internet opinions like "where is thrust vectors?" "J-20 worse rear-aspect stealth"

Other interesting comments from chief:

"Only US and China has 'omnidirection data link' "

"Information, electronic warfare is the key of current battle. But as more tactics develop, human pilot cannot keep up with numbers of techniques needed to learn. There gotta be simplifications. That is why AI is the next key. AI can manage that for the pilot"