There are some gaps and discontinuities in the rear aspect, and in general there’s more round rather than faceted or angled shapes, that we don’t see in the frontal aspect. Maybe materials advancements help on those too. But from a shaping standpoint the rear is not as optimal as the front.
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- Thread starter Jeff Head
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That's the case with most fifth generation aircraft though.
Anyhow I think we've gone off topic. Maybe these posts are better in the J-20 thread.
F-35 benefits from having just one stovepipe shape as opposed to two and seems to have put a bit more work into finer details in the wing to fuselage fairings. F-22 obviously traded some weight penalties to get optimal read aspect shaping. But yeah off topic at this point, sorry.
you can just take a look at the rear of F-35 vs F-22 vs J-20. You will see how much F-22 hides its nozzles. F-35 would be worse than F-22 from the rear. Between F-35 and J-20, you can see a lot of gaps at the back which could also cause greater radar deflection.
F-35
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now J-20
just more gaps possible deflection issues for J-20 at the back. And that's even assuming the canards trailing sawtooth patterns are scattering the radar coming off the delta wings rather than deflecting them back. I think there could potentially be issues there too.
Keep in mind the change from AL-31FN to WS-10C is a big deal. The new nozzle they have in there should be reducing both the radar and IR signature by quite a bit.
I think at this point any contribution from the canards and ventral fins should be pretty trivial with the right RCS mitigation treatments. Edge reflector effects are not where the challenges are.you can just take a look at the rear of F-35 vs F-22 vs J-20. You will see how much F-22 hides its nozzles. F-35 would be worse than F-22 from the rear. Between F-35 and J-20, you can see a lot of gaps at the back which could also cause greater radar deflection.
F-35
now J-20
just more gaps possible deflection issues for J-20 at the back. And that's even assuming the canards trailing sawtooth patterns are scattering the radar coming off the delta wings rather than deflecting them back. I think there could potentially be issues there too.
given how much effort is put into eliminating the tiniest imperfections in stealth aircraft, I would have to disagree with that. Also, I don't think ventral fins are that bad. To me, it's just a smaller vertical tail fin. and it also blocks the nozzle pretty well from the side.
I remember that some western institute made a scale model of J-20 and tested it to gauge its RCS. Their finding is while not as stealthy as F-22 and F-35 its RCS is low enough to be considered stealth despite its big canards. This test had some flaws though, their model is based on the J-20 prototype rather than the production model, they also used commercially avalaible RAM coating while China obviously has better one especially for the latest version, also they might not apply the coating correctly since it was later revealed that J-20 has serrated coating on it canards.
If you are referring to analysis, the main conclusion would be that the J-20 is stealthy to the same order of magnitude as the F-22 (-40dBsm) in the optimal angle. Kopp is a famous F-35 critic and considers the F-35 to be less stealthy than the J-20, at least shaping-wise.
optionsss
Junior Member
AVIC will look to explore AG600 application in civilian market, particularly they mentioned emergency aviation rescue.
Search and rescue is a rather lacking for the Chinese coast guard, in some areas the rescue operations are still entirely reliant on volunteers with obsolete equipment.
