J-20 5th Gen Fighter Thread VI

[latenlazy]

Has anyone else noticed the tape like markings/additions on some J-20s. The example above has this running along the fuselage, spanning the entire left wing and curiously also applied at the edge of the ventral fin, visible in the photo above. We've seen similar treatment to F-35 where certain panels lie.

Can't help but feel these details are somehow important in how the "stealth" in these designs work.

J-20's top surface are sometimes photographed with these and they are often also absent (at least less obvious due to lighting).

For VLO objects the edges of surface panels are sometimes treated with RAM to dampen traveling waves, which is EM radiation that conduct along the surface of an object when a EM beam hits that object.

 

[TerraN_EmpirE]

They saw tooth panels then use a RAM material to reduce return from seams and gaps.

 

[Klon]

Vertical stabilizer and dorsal fin are the yaw control surface of the aircraft. To satisfy the low radar observability design requirement, stealth aircraft usually use canted twin vertical stabilizer and/or twin dorsal fins. The canted surfaces not only shield the high temperature components in the aft fuselage and hot exhausts to a certain degree, they also enhance the mixing of exhaust jet with air. Fig. 4-44 show the effects of inward- and outward-canted vertical stabilizers have on the exhaust jet. In the outward-canted configuration, the shear layer of the jet is smooth. In the inward-canted one, the jet is twisted and the shear layer become rough; the mixing between jet and the surrounding flow is significantly enhanced; the decay of the high temperature region is increased.

Thank you. Should dorsal read ventral here?

Not sure how this would apply to J-20 in specifically. May be the dorsal fins are there to also improve IR characteristics?

I got it from a discussion about ventral fins (and all that comes with it) on cjdby, where the "caption" suggested it was about their influence on stealth and IR, and that it was from Sang Jianhua.

 

[mys_721tx]

Thank you. Should dorsal read ventral here?

Yes, got my anatomy terms mixed up there.

 

[Hendrik_2000]

According to post by LKJ86
J-20 is now in mass production

 

[Deino]

According to post by LKJ86
J-20 is now in mass production

Can anyone provide a direct translation please?

 

[by78]

10 more high-resolution photos of J-20...

 

[by78]

 

[mys_721tx]

Can anyone provide a direct translation please?

This is the jest of the news in the first paragraph.

On March 7th, CAC announce the establishment of five institutions, including the Delivery Center and Assembly Plant 1 in order to implement the new development strategy of the aerospace industry, to establish a quick response mechanism, to strengthen the buildup of core capability, and to implement the civil-military fusion srategy.

The rest are the speculations by this commentator that J-20 will enter serial production in the Assembly Plant 1 as production issues have been worked out in the LRIP planes.

The commentator then offhandedly mentioned the 500th J-11 has rolled off the production on the anniversary of its first flight.

 

[localizer]

This is the jest of the news in the first paragraph.



The rest are the speculations by this commentator that J-20 will enter serial production in the Assembly Plant 1 as production issues have been worked out in the LRIP planes.

The commentator then offhandedly mentioned the 500th J-11 has rolled off the production on the anniversary of its first flight.

This means they've sorted out the engines?