J-20... The New Generation Fighter III

Originally Posted by paintgun

Martian, meet Mig-29

i respectfully request a thread cleaning

Hilarious

Originally Posted by Martian

Due to the incessant complaints to my 2 posts on the J-20, which are the only ones that I have made in the last few months, I will take another long vacation and let you chat among yourselves. It is ridiculous how much you guys complain at my few posts.

Dude , I feel your "pain" .

Sometimes , one gets the impression that only certain nations are about to produce truly advanced "alien" like fighters that cannot be detected, and cannot be shot down.

If China were to develope a new generation fighther , it gets scrutinized and diagnosed under the most powerful microscope in the galaxy . Every assumption, opinion , value, and fact gets challenged .

This limits the quality ,extent & depth of discussion on this forum .

What a pity .

Apparently someone said that the pic of the J-20 flying with paint chipping off near the tail was ps'd

I somewhat doubt that, given we saw quite a few pictures of the paint or whatever it was chipped off, and that we haven't seen any pictures of the same pictures without the chipping if it was PS.

Besides who would be so daft to PS that bit of paint off

Originally Posted by victtodd

Hilarious

: those are points of view

FFS, not this again.

Is this real? J-10BS with WS-10?



Colour looks a bit unnatural but could be just due to poor photo quality.
Waiting for confirmation.

... That was posted in the J-10 thread, why post again in this one lol?

And personally I think it's PSed... if it were real there'd be a lot more noise.

^ I didn't notice the post in the J-10 thread, and I posted in this thread by accident thinking this was the J-10 thread.

Mods please delete the post, thanks.

latenlazy, about "scallops", what do you think about LO tapes, it is used extensively on F-22 and F-35

another tell tale (if it does exist now or later) that the J-20 is in the ballpark of F-22/F-35 LO?

Originally Posted by paintgun

latenlazy, about "scallops", what do you think about LO tapes, it is used extensively on F-22 and F-35

another tell tale (if it does exist now or later) that the J-20 is in the ballpark of F-22/F-35 LO?

I think it's probably irrelevant. How LO the J-20 will depends on the exact properties of the material in terms of signals management, and not so much the type of application it uses. It will also be a question of LO to which radars, since you can't make a plane invisible to every band range. Put it simply, we don't know. It seems that the J-20 at least will have a good baseline based on its shaping, but it's difficult to extrapolate from there, and I'm no specialist on EM.

well it is said LO is 80% about shaping, to say that the J-20 got the shaping alright means it got the 80% done

so they are hunting for the 20% now

i agree, its too early to tell from this prototype, we'll just have to wait

Originally Posted by paintgun

well it is said LO is 80% about shaping, to say that the J-20 got the shaping alright means it got the 80% done

so they are hunting for the 20% now

i agree, its too early to tell from this prototype, we'll just have to wait

That's a bit of an oversimplification I think. It's better to think of shaping as the absolute lowest potential rcs, and then any deficiencies in material, finish etc as adding to that lowest point. Keep in mind though, this all happens specifically in the context of different frequency ranges.

I should have clarified to say the J-20 seems to have rather good frontal and side aspect shaping. The shaping of the tail is noticeably poorer, but well see what they do with that. I don't doubt we're going tos ee revisions to the design as testing continues.

yes its a simplification, that 20% might account for a digit or two of decibels in LO measurement, and Americans went to great lengths pursuing it

about tail aspect, redesign will depend on the new engine, how increased thrust and different control will affect flight, how TVC affect flight laws, elimination of ventral stabs(probably?)

and WS-15 cant be at the same size with AL-31/WS-10 can it?