J-20 5th Gen Fighter Thread VI

[plawolf]

There are too many variables depending on the radar, weather conditions, the aircraft's angle of approach, etc. There is no way of knowing.

There is zero possibility of detection if J20s were never closer than a few hundred KM from the boarder with India, and there would have been no reason for the J20 to go that close and every reason for them not to.

China has the Su35, which has a more advanced and capable radar than the MKI’s BARS. That means the PLAAF should have a very high degree of accuracy projection for the maximum range at which the MKI could pick up the J20 (not greater than the range the Su35 could).

With the RCS of the MKI, there is zero chance the PLAAF would allow them to get close enough to a J20 to have any chance of detecting them, since the J20 and/or other Chinese assets would be able to detect them far before they have any chance to pick up a J20.

What more, all production J20s in PLAAF service have lumberg lenses attached during all known documented manoeuvres. Since the PLAAF would have already tested their RCS extensively, meaning there is no need for them to fly clean to give anyone even a remote chance to get actual combat config RCS profiles. So even if the PLAAF allowed the MKI to get that close to the J20 for some unfathumable reason, what they would have picked up would have been the lumberg lense, and not the J20.

 

[AleDucat]

With no visual identification, how a MKI can possible know that it’s radar has picked up a J-20?

 

[Equation]

With no visual identification, how a MKI can possible know that it’s radar has picked up a J-20?

Easy it didn't. They just picked up BS on the radar instead.

 

[coolieno99]

One can clearly see the Luneburg lens attach to the bottom of the fuselage of the J-20 at 0:25 . Luneburg lens is a strong reflector of radar waves despite its small size. The Indians should detect the J-20
Besides hiding true RCS of stealth aircrafts, it also make them visible to civilian air traffic control radar for safety reason.

 

[Equation]

One can clearly see the Luneburg lens attach to the bottom of the fuselage of the J-20 at 0:25 . Luneburg lens is a strong reflector of radar waves despite its small size. The Indians should detect the J-20
Besides hiding true RCS of stealth aircrafts, it also make them visible to civilian air traffic control radar for safety reason.

Yeah IF the opposing fighter planes so happens to be underneath the J-20 belly side looking up long enough to pick it up on their radar. If the people whom design J-20 with the Luneberg lens underneath didn't think that it would become that detrimental to the aircraft over all operation stealth than they wouldn't have put it there in the first place.

 

[Air Force Brat]

Yeah IF the opposing fighter planes so happens to be underneath the J-20 belly side looking up long enough to pick it up on their radar. If the people whom design J-20 with the Luneberg lens underneath didn't think that it would become that detrimental to the aircraft over all operation stealth than they wouldn't have put it there in the first place.

The Luneberg lens is a removable radar image enhancer,, its designed to make a stealthy aircraft visible to air traffic control as well as other aircraft,, it has NO bearing whatsoever on the aircrafts overall operational stealth...

A more immediate use at present, is to "overshadow" whatever radar return the aircraft would generate,,, confusing any observer about the actual RCS of an L/O aircraft... the Chinese have no intention of revealing the actual RCS of the J-20, and most day to day operations are with the Luneberg lens attached to the aircraft.

The exception of course would be "Golden Helmet" or "Red Flag" type exercises.

 

[jobjed]

J-20 HMD seen again, being examined by a fellow from a PLAAF institute.

 

[yt19967]

 

[Deino]

View attachment 47320

: ... but is this a real image of a real PL-10 on a real J-20?

I remember a quite amazing CG from some years ago ... need to look when I'm back home.

 

[Totoro]

That's a very nice, clear image. If real, it also suggests 3,082 meter long side weapon bay doors (using 2,96 m long missile) and thus another vote for the 19,8 meter length of whole plane.