It depends, external frame canopy will give edge diffractions due to change of materials, however, that thing is coated with RAM, which definately works better than a reflecting canopy used on f-22 or absorbing canopy on su-57 (slated to be 30% absorption at unknown frequency)
They are more for ground strike missions, the circular irst is small itself, it’s coated with thick layer of RAM, when not in use. Due to smooth surfaces, it doesn’t give edge diffractions like f35 or j20 irst does, but thing is when irst is used, it will increase its rcs by a decent amount
That regions can be covered with RAM sponges, like the one used in anachoeic chamber. However we don’t have a single image of su57 with it’s array, so its not fair to jump to conclusions in this case
Isn’t that kind of the whole point of stealth aircraft geometry?
Well, I used the wrong terminology, but how does that change anything? Everyone tries to hide the frame under that oxide coating or make the canopy frameless — but why bother, when you can just leave a huge gap? So either you’re wrong, or every other 5th-gen aircraft manufacturer is. Who should I believe?
While the ball on the nose of the Su-57 seriously increases its RCS. I think I have an idea which solution is more effective.
Alright, let’s try it this way. What is this, and how does it affect the RCS?
I see. It’s just that the guys from LM and Chengdu like to make life complicated for themselves — they need to be shown this forum. Or do you have another explanation for why they do it?
I just read that the stealth aircraft concept is based on reflecting radar waves away so that only a small portion returns to the illuminating radar. And for radar-absorbing materials to be equally effective, they have to be very thick.
Oh, well if that’s the case, then you’ll be able to use your radar!
Is that against free space or against the ground? In complex or simple weather conditions? At high altitude or low altitude? In calm conditions or with ECM in use? Alone or with cross-illumination from radars of the same type? I’d just like to clarify.
That doesn’t matter, the moderator deleted most posts at random. Better answer the main question of the discussion — why are all those serrated edges on the panels and joints needed?
S to X bands are a HUE gap in wavelength, there isn’t much of a “made for both” here, as S would negate its advantages to begin with.
X-band radars have relatively shorter wavelengths, larger bands couldn’t care less about serration when it doesn’t have a tangible affect on its reflection.
to make myself clear i was talking about sawtooth edges, which wont matter for X band
However for the serrated physical edges, they will matter for x band, but what actually would be right to say, simply angling would be enough, making it serrated would actually make it irregular, giving of diffractions.
the frame itself is angled a bit downwards, other than that
the white stuff seems to be RAM sandwiched in between, this is also supported by the fact this is applied on important exposed joints, where RAM would help.
