>no internal weapons bay
>supposedly stealth

The only people calling it a stealth fighter right now are south koreans and retards.

Even official Korean documents refer to it as a non-stealth fighter and there are even some official documents that refer to the KF-21EX (the version with the internal weapon bays) as a "low observable" fighter, not a true stealth fighter.

>>64077559 (OP)
ETA 10 seconds and the local kor shill will post an image that totally proves that they will have an IWB in the next "2 weeks"
Meanwhile the KAAN already has one.

>>64077571
>as a "low observable" fighter
Stealth aircrafts are all officialy LO. The kf21 isn't even remotely close to being LO.

>>64077559 (OP)
If it is lower observable than whatever Best Korea has, then good for them I guess. I like recessed missile hardpoints like on the Phantom, and I get they may reduce radar return a bit, they still seem to be a bigger return than just implementing a belly bay would be.

Explain to a retard why planes like the Su-57 or KF-21 with IWB aren't proper stealth like the F-35. What about Chinese J-20 and J-35?

>>64077616
The Su-57 was built by alcoholic retards and has worse panel gaps than a 2004 Nissan Altima. The other ones are probably fine enough, even if they don't reach the standard set by the F-22/F-35

>>64077588
Again, the KF-21EX

The version WITH an internal weapons bay, NOT the KF-21 Block 1, the jet pictured in the OP.

>>64077588
Also when they say LO, they mean it has stealth characteristics (airframe shape and internal weapons bay) but doesn't have a radar absorbing coating to get close to the F-22/F-35 level of RCS reduction.

>>64077559 (OP)
If the CCP can build a jet with an internal bay, why can't worse korea?
Genuine question.

>>64077616
They need to be about 1000 times smaller on radar to be considered proper stealth, and they aren't. It's that simple.

>>64077665
imo its a piecemeal approach. IWB adds another layer of complexity, so they first want to mature the program to a certain level and then add it in afterward

>>64077731
Sure but at the current pace it'll mean IWBs in the mid 2030s at the earliest, domestic engines sometime in the late 2030s or early 2040s, and MAYBE a pathway (or clean sheet design) for 6th gen sometime in the 2050s

>>64077741
i didnt say it was a GOOD approach, but that was likely their reasoning. they also probably didnt expect development to take so long

>>64077651
>KF-21EX
And it will be available in 2 more weeks, right?Even with an IWB it still will not be stealth. The recce pod, the IRST etc they all make it glow on radar.

>>64077731
That's retarded. The longer they wait the harder it's to implement, and no customer wants to play the test pig for an inferior prototype.

>>64077720
>1000 times smaller
Now you gave me an idea, build F-35 1000 times bigger.

>>64077760
>Even with an IWB it still will not be stealth
...yes that's literally the entire point of my post.

They are not using LO to mean stealth on par with ACTUAL stealth aircraft (F-22/F-35/B-2/B-21, hell even F-117) they are using LO to mean IWB + stealthy airframe shape ONLY.

It wont have a radar absorbing material coating like ACTUAL stealth planes have.

>>64077770
>no customer wants to play the test pig for an inferior prototype.
why else do you think indonesia is so unhappy lol. they signed up for it way back in 2010

It may not be stealth but why is this 4.5 gen plane bad for poorfag countries like Indonesia for example? It does indeed lack real stealth but it's pretty solid otherwise

Bruh, it's a Su-57, just not retarded and not made by corrupt FAS monkeys

>>64077802
probably because theres no plane to fucking buy. we're closer to 2030 than 2020 and this 4.5 gen is still not in production

>>64077796
While they "joined" in 2010, the actual agreement for the KF-21 development funding split was done in 2015/16.

They've also paid $400B Won (around $300M USD) of the owed $600B Won, and thus owe around $200B Won (around $150M USD) to South Korea.

The original agreement was for ~1.7T Won (around $1.3B USD) but it was renegotiated in a finalized agreement in june 2025 to only pay about 1/3rd of that amount in exchange for reduced technology transfer.


Part of the original agreement included giving Indonesia one of the prototype airframes for testing/evaluation, but I'm unsure if that will still happen.

>>64077651
/thread

>>64077802
No one is really saying it's a "bad" plane, just fighting against SK shilling that it's on par with or better than the F-35, it's a 5th gen, it's a domestic design (even though it's a lockheed handmedown), etc.

Korean hype monkies are why we shit on this jet.

>>64077559 (OP)
IWB will be added in later blocks

>>64077559 (OP)
Meme plane. Unironically.

>>64077856
IWB won't make it stealth, you still need radar-absorbent materials to coat the plane with.
IWB just reduces the RCS from being complete dogshit, to being slightly stealthy.

>>64077830
Not really

>>64077832
What do you mean by "we"?
Are the Korean hype monkies in the room with us right now?

>>64077559 (OP)
>>supposedly stealth
Not yet. Its next iteration that will probably take flight by 2032 will be the stealthy variant since the current model was already designed with the internal space necessary for stealthy weapons bays. It's empty and free real estate in there.

>>64077882
OP is lying by omission. If the thread only has a discussion because OP withholds important information, then it is a warriortard tier bullshit thread and has no right to exist.

>>64077862
RAM materials are already being used

>>64077720
Do you have the proper RCS measurements of the KF-21 with internal weapons bays?

>>64077931
Only on a few of the leading surfaces, not full body coverage.

>>64077954
>>64077931
False

>>64077633
Don't believe a word the chinks say, they're probably as bad if not worse than the Su-57.
However we should pretend we believe them and mass produce the F-69 super megadeath ultra commie killer destroyer of China Raptor II.
Like how the USAF panicked and created the F-15 when the MiG-25 was invented.

RAM and a IWB won't fix this mess.

>>64077985
I mean, F-35s have this bad boy poking his head out

>>64078019
How else could you measure air speed?

>>64077954
because those are the scattering centers and are most important to overall performance

>>64077633
>2020: it's fine, we're not going to way any time soon anyway
>2022: blyat

>>64077731
With no internal bay it means room for more fuel.

"Low observability" is an gay excuse for why planes have to look boring as shit now.

>>64077559 (OP)
Who did the Koreans piss off, is it china?

>>64077571
low observable is stealth retardkun

>>64078486
Yeah, Korea just sold some planes to China's worst enemy.

>>64078657
That doesn’t explain why they’d shill here, do those slants think that some Filipino journalist will come here and use their thread as a primary source in some hit piece?
>SH4PK

>>64077776
that's a dropship

>>64077559 (OP)
You can intergrade a missile hardpoint into the body in a way that maintains stealth with a missile fitted or not.
The primary downside is it'll only work for that one missile and if you carry a different missile or bomb stealth is severely compromised.

>>64078486
Considering how blatently dishonest the OP is and how there is one idiot gets mad every time some mentions what is wrong with OPs claim i suspect one of our local schizos is behind this mess of a thread. Or it is a troll aka someone that cant get people to engage with him unless he acts openly like an idiot.

>>64078862
I wonder who it could be, maybe the Han supremacy sperg?
In any case, thanks for the info, anon.

>>64078893
These two fresh ones are probaly also by him:
>>64077395
>>64078878

>>64078893
My guess is an Indian seething over their lack of options, since they've lost the goodwill needed for the f-35 (why we even offered to give it to them is beyond me) and Rafale. Hence the he's pissed at the Koreans for turning India down and desperately shilling the Tejas as we can see here >>64078910

>>64078925
Has more of a 'throw shit at the wall and see what sticks' vibe, it's clear though he wants people to target Korea and India.

>>64078925
>Indian seething
Except Trump is the one who backstabbed India by ramping up tariffs for no reason.

>>64078862
>>64078925
Consider, if you will, how much asshurt the sork arms industry must cause jeet shills by its mere existence. For every hilariously corruption-riddled failure of a defense project that India has attempted in recent memory, South Korea has a successful equivalent. Compare the INSAS to the K2, or the Arjun to the K2 (the other one), or the Tejas to the T-50, or the submarine that did the needful to the KSS-III class. Hard work, technical competency, and visible growth vs laziness, corruption, and every other type of brownoid shittery.

>>64078954
I was thinking it's a jeet, but it could easily be a chink pretending to be a jeet.

>>64078991
>Consider, if you will, how much asshurt the sork arms industry must cause jeet shills by its mere existence
You're fighting ghosts, jeets don't think about worst squids at all.

>>64078954
Like some kind of strawman tactic? I guess that would make sense, but to what end? Nobody trusts Hindustan on a national level beyond trying to wedge it into chinas backside. And I think people are pretty set in their opinions on South Korea, some faux shilling isn’t going to change anyone’s mind.

>>64077633
That's the prototype/testbed model retard

>>64078991
>>64079000
Mhhh...

>>64078997
The nature of the other KF-21 threads up right now (previous ones as well) had me thinking otherwise. Then again, it could indeed be a false flag. This plane seems to attract the attention of all kinds of thirdie schizos, like that one malaynigger.

>>64079037
India have bigger fish to fry, south korea isn't even on their radar. Literal mosquito.

>>64079037
All three threads are similar low effort attempts to get posters to shit on the two nations, which makes me believe OP is from neither and he's just tries to start shit.

>>64079047
ESL

>>64077665
Genuine answer. Because aircraft design doesn't work that way. China has been building up their aircraft design and manufacturing industry for 40 years before the J-20B (the version that is actually stealth) began manufacturing. And China is so opaque that we all know the J-20B isn't actually operational yet, most of their claims have time delay that they just don't mention. South Korea has been focusing on their own aircraft for less time. Simple as.

>>64078977
>still buys russian oil
>>by ramping up tariffs for no reason
go seethe somewhere else jeet

>>64077559 (OP)
Pretty sure this is a thumbnail of a youtube video made by a fucking flip. You wanna know how I know? Look at the roundel on the aircraft. It's the roundel of the Philippine Air Force.

>>64079442
Literally what they've been doing since forever, it shouldn't mean anything to America. Especially since India is part of the Quad chink containment network.

>>64077633
J20 has a single luneburg to the F35s 4
We should question why that is

>>64079013
The only version they have?
What sort of test models doesn't conform to any of the standards required to be valuable for any kind of test of the real things capabilities?

>>64077559 (OP)
https://aviationweek.com/defense/aircraft-propulsion/kai-plans-internal-weapons-bay-kf-21ex
>DAEJEON, South Korea—Korea Aerospace Industries (KAI) has revealed that a future variant of the KF-21 fighter will feature an internal weapons bay capable of housing a 2,000-lb. guided bomb, significantly enhancing its strike capability while maintaining low observability.

>The upgraded variant, designated KF-21EX, is designed to engage hardened ground targets—such as reinforced bunkers—without increasing its radar cross section (RCS) through external weapons carriage.

>The disclosure came during an air force conference held July 28 in Daejeon, South Korea, where KAI presented a detailed roadmap for the KF-21EX under the title, “KF-21 Performance Improvement and Manned-Unmanned Teaming (MUM-T) Combat System.” The presentation offered the most comprehensive public look to date at the planned enhancements, building upon initial concepts disclosed last year.

>The addition of the internal weapons bay is the most significant structural change in the KF-21EX. According to KAI, the bay is expected to accommodate a range of munitions including the MBDA Meteor beyond-visual-range air-to-air missile, LIG Nex1's indigenous long-range air-to-air missile (LRAAM), the GBU-39 Small Diameter Bomb, KAI's own Air-Launched Effects (ALE), and 2,000-lb.-class guided bombs—believed to be the GBU-31 Joint Direct Attack Munition (JDAM).

KF-21 was designed to be upgraded into a 5th gen from the onset.

>>64078019
>1 pitot tube
VS
>entire plane worth of fuckups

>>64079633
Sorry, it will never be a 5th gen. The chink cargo cult mentality is not enough

>>64079616
>Literally what they've been doing since forever
They shit on the street since forever but doesn't mean they should continue to do so. And they're in the chink bashing alliance out of personal interest and that won't change due to tariffs.

>>64079660
>Sorry, it will never be a 5th gen. The chink cargo cult mentality is not enough
https://x.com/fa50_defense/status/1915015955861868752
>The KF-21 internal weapons bay air-to-air missile pylon project has been announced.(25.10.~29.9.)
>Ejection method: Pneumatic ejection
>Mounting store weight: Capable of mounting AMRAAM-class weapons
>Ejection length: To ensure safe separation, the weapon is distanced from the weapon pylon during separation.
>Development Concept

>Development of a weapon mounting/separation mechanism technology that securely fixes air-to-air weapons in the internal weapons bay until separation and ensures safe separation during ejection.

>Development of a release device technology that safely separates the weapon from the aircraft by distancing it from the pylon through a release control device, using compressed air, according to the release signal, over the required ejection length.

>Development of the design and performance verification technology for the weapon pylon release device and pneumatic control device to meet the performance objectives outlined in the development goals.

>Necessity of Research and Development

>Development of an internal weapons bay for aerial platforms is necessary to minimize drag and achieve a low radar cross-section (RCS) shape, in order to evade threats from anti-aircraft weapons and enemy aircraft, while infiltrating to the target area and executing mission objectives.

>>64079785
>random ass tweet
>random ass posturing of third world worst korea
lol

>>64079831
You are brown.

>>64080129
>implying I'm a brownoid
Lol, lmao even. I accept your defeat, yellow flat faced gook.

>>64078862
Thats like 80% of 4chan, faggot

(I called you a faggot so you would get angry and reply, btw)

>>64079063
japshills hate korshills the most on 4chan

>>64079063
it's the usual shar*y posting trolling with artificial flame wars. It's in their troll wiki

>>64080314
>japshills
desu it’s usually just poopy coming over from /wtg/ with the exact same images he posts there

>>64080325
how do you know he's indian to begin with?

>>64080335
I don’t even know what he is
poopy is just the name of the wtg guy that spams JSDF shit and has a weird obsession with the J7W

>>64080325
I've been accused of being the "japshill" by the gookretard for years and I've never even been on /wtg/

>>64080498
Stfu japshill, we know you by your miso breath
>posted on my Samsung galaxy from metro seoul south korea