J-20 5th Gen Fighter Thread VIII

Deino

Lieutenant General
Staff member
Super Moderator
Registered Member
According to a video from another post by the same OP, at least one J-20A (WS-15) has already been painted with stealth coating.

View attachment 167034

Please, Log in or Register to view URLs content!


I heard the same, but since this grey one has the typical silver ring in front of the nozzle I now tend this is in fact an older one using WS-10C2

IMG_6091.jpeg
 

Gloire_bb

Major
Registered Member
Well, if the circulated thrust figures are in the ballpark and with J-20 long and sleek design, it should at least accelerate like a bat outta hell. Same likely for supercruise capability, probably at least on par if not even better than what the americans claim for F-22 (about 1.8 Mach).
Yep, J-20 was clearly always meant to fight supersonic. What it couldn't quite realise it for first part of its life was probably a major dissapointment to the design team.
 

Deino

Lieutenant General
Staff member
Super Moderator
Registered Member
So apparently 6 mass-produced J-20A (WS-15) have completed their maiden flights.

Please, Log in or Register to view URLs content!
View attachment 167033

The video appears to be on a loop, but according to the OP, it actually features six different J-20As.

Some additional notes from a friend:

„The full details of the rumor:

Earlier, someone reported that 10 J-20A (WS-15) aircraft were spotted at CAC. Three of them had official paint schemes, and seven had a yellow primer coating.

Yesterday, a total of six flight activities involving the J-20A (WS-15) were observed.
Therefore, it is speculated that six J-20A (WS-15) aircraft were conducting flights, rather than one J-20A (WS-15) flying six times.

This is a topic of discussion among military enthusiasts and lacks official confirmation. For reference only.„
 

Mearex

Junior Member
Registered Member
F22 has these 2 gigantic tail fins that is sub-optimal for stealth regardless of direction, also caret type intakes are not as stealthy when viewed head-on. I would consider F22 to have better stealth when viewed from the rear and marginally worse stealth from front and the sides. Also, for kinematics, J20a with ws15 has the highest thrust-to-weight ratio on the planet, so yes, better kinematics.
The direction does matter, because when viewed from the front, all that's seen are the height of those tails, and not so much the surface area. The F-22 when viewed from the front only has 4 planar surfaces, while the J-20 has 8 due to ventral fins and canards not being co-planar with the delta wings. The F-22 also has better edge alignment. Carets are indeed worse for stealth than DSIs, but this will also have to tie into your claim about better kinematics. Keep in mind that carets are better for higher speeds which allows the F-22 to push to at least mach 2.25, while the J-20 with DSIs is unlikely to have a higher top speed because DSIs severely lose efficiency past mach 2. Granted top speed isn't as important as super cruise speed in westpac
 

qwerty3173

Junior Member
Registered Member
The direction does matter, because when viewed from the front, all that's seen are the height of those tails, and not so much the surface area. The F-22 when viewed from the front only has 4 planar surfaces, while the J-20 has 8 due to ventral fins and canards not being co-planar with the delta wings. The F-22 also has better edge alignment. Carets are indeed worse for stealth than DSIs, but this will also have to tie into your claim about better kinematics. Keep in mind that carets are better for higher speeds which allows the F-22 to push to at least mach 2.25, while the J-20 with DSIs is unlikely to have a higher top speed because DSIs severely lose efficiency past mach 2. Granted top speed isn't as important as super cruise speed in westpac
The lower ventral fins, as they do not need to withstand the incredible sideways force from a movable control surface, are made from non-conducting all-composite materials and is thus transparent to radar. Also, variable DSI inlets are already utilized on J20 from the ChaHuaHui podcast, which can adapt to far greater possible inlet air conditions that a stationary inlet can ever hope to be. The vertical tail edge of the F22 is roughly equal to the sum of of the edge length of the canards and the much more compact tails of the J20.
 

karaway

Just Hatched
Registered Member
The direction does matter, because when viewed from the front, all that's seen are the height of those tails, and not so much the surface area. The F-22 when viewed from the front only has 4 planar surfaces, while the J-20 has 8 due to ventral fins and canards not being co-planar with the delta wings. The F-22 also has better edge alignment. Carets are indeed worse for stealth than DSIs, but this will also have to tie into your claim about better kinematics. Keep in mind that carets are better for higher speeds which allows the F-22 to push to at least mach 2.25, while the J-20 with DSIs is unlikely to have a higher top speed because DSIs severely lose efficiency past mach 2. Granted top speed isn't as important as super cruise speed in westpac
I don't think the difference in stealth capabilities between the J-20 and the F-22 is significant enough to affect their ability to complete their missions.

Stealth fighter jets are not designed for one-on-one combat against enemy stealth fighter jets.

In the mission to strike at the key operational points of the enemy,the J20, which is equipped with more advanced electronic devices and has excellent supersonic capabilities, is a better air superiority fighter compared to the F22.

Of course, even in a one-on-one scenario, I believe that the J20, which has more advanced detection equipment, would have certain advantages in medium to long-range aerial combat over the F22.

If it's a close-range air battle, the F22 might have some advantages over the J20.

However, according to the internal exercise results of the PLAAF, the Su-35, despite its strong mobility, did not demonstrate the dominance that was expected.
 

qwerty3173

Junior Member
Registered Member
However, according to the internal exercise results of the PLAAF, the Su-35, despite its strong mobility, did not demonstrate the dominance that was expected.
Problem is that pilots can still only stand so much g-force. Thrust vectoring when used reasonably increases the efficiency in turning (less energy loss over multiple dogfight loops) but the improvements in infrared missiles makes WVR encounters incredibly short and decisive. And at normal engagement speeds, a proper canard design can almost always generate enough maneuvering force to reach the limits of a human pilot, even without TVC. Sure, the energy loss from aggressive canard use is fast, but that doesn't really matter if the whole battle consists of around 20 seconds.
 

Alfa_Particle

Senior Member
Registered Member
Problem is that pilots can still only stand so much g-force. Thrust vectoring when used reasonably increases the efficiency in turning (less energy loss over multiple dogfight loops) but the improvements in infrared missiles makes WVR encounters incredibly short and decisive. And at normal engagement speeds, a proper canard design can almost always generate enough maneuvering force to reach the limits of a human pilot, even without TVC. Sure, the energy loss from aggressive canard use is fast, but that doesn't really matter if the whole battle consists of around 20 seconds.
A ridiculous TWR kinda helps in offsetting said energy loss, which is what the J-20A most certainly has now with WS-15s.
 
Last edited:
Top