TR Air-Force TF-X KAAN Fighter Jet

Yasar_TR · 2026-11-01T12:47:30-0600

TR_123456 said:
What secrets would those be?

View attachment 83798

View attachment 83799

Those flaps primarily help control pitch; if the nose is to face upwards or downwards. Also gives aerodynamic stability to the plane.
Stealthy planes are inherently very unstable anyway. So they need very good fly-by-wire computer control programs to fly straight. To do that they will need very effective actuators that will respond with very high precision very quickly.

On Kaan these stabilisers are exceptionally large and hence heavy. Certain technologies can be applied (like carbon fibre composites to bring down weight.

In size they are not that much bigger than F22’s. But F22 uses 2D TVC to help with pitch control. In KAAN all the work is expected from these stabilators. Therefore much more excessive stress will be applied to them and to the actuators. But we are not privy to enough knowledge about what precautions Tusas has taken to overcome these difficulties. So unless Tusas states problems, we should not lose confidence in our engineers and Tusas.
As stated above KAAN is a work in progress. It will still be a work in progress when we have 20 or 40 of them in our inventory.

Şok Tedavisi · 2026-11-01T13:51:02-0600

Yasar_TR said:
Those flaps primarily help control pitch; if the nose is to face upwards or downwards. Also gives aerodynamic stability to the plane.
Stealthy planes are inherently very unstable anyway. So they need very good fly-by-wire computer control programs to fly straight. To do that they will need very effective actuators that will respond with very high precision very quickly.

On Kaan these stabilisers are exceptionally large and hence heavy. Certain technologies can be applied (like carbon fibre composites to bring down weight.

In size they are not that much bigger than F22’s. But F22 uses 2D TVC to help with pitch control. In KAAN all the work is expected from these stabilators. Therefore much more excessive stress will be applied to them and to the actuators. But we are not privy to enough knowledge about what precautions Tusas has taken to overcome these difficulties. So unless Tusas states problems, we should not lose confidence in our engineers and Tusas.
As stated above KAAN is a work in progress. It will still be a work in progress when we have 20 or 40 of them in our inventory.

Yeah a new design will be needed to fix those sadly.

Huelague · 2026-11-01T14:11:15-0600

Şok Tedavisi said:
So looks like Kaan is not going to shotdown any F35s like you were saying for years zafer

Does this information pleased you?

Şok Tedavisi · 2026-11-01T14:14:18-0600

Huelague said:
Does this information pleased you?

Yes, now you people learned how hard it is to produce a fighter jet, one mistake can cost you everything so lets say goodbye to 2030 plans, even If they fly them there will be crashes which is a bad publicity, TUSAS needs to redesign the KAAN so It will be safer for our pilots meanwhile they can produce the subsytems and test them for good not political stunts.

Huelague · 2026-11-01T14:25:59-0600

Şok Tedavisi said:
you people

it seems and hoping the project must fail.

Şok Tedavisi · 2026-11-01T14:27:35-0600

Huelague said:
it seems and hoping the project must fail.

Yeah "not believing everything said by tusas"

Samba · 2026-11-01T14:37:44-0600

TR_123456 said:
What bad intent could i have here?
Why come up with lame excuses?
The whole world can see the dumb mistakes,even after being warned many times they did nothing.
Would you rather like it when the KAAN becomes a laughing stock,''the Turks with their decades in aviation couldnt produce a working fighter jet,made a rookie mistake''.
if we dont argue about it who will?
They need to fix it ASAP or be ridiculed.

I could not explain myself well enough I guess. If something is wrong, which is very possible, just saying "bla bla we told them", "bla bla they told them..." won't cut it. You need to be specific. I keep asking how is it fundementally different than F22 F35 SU57. It should be such an easy question for a guy with the knowledge and experience. I don't know it. He may be 100% correct. But this is not the way to present your claim. F22 also has very high stabilizers. Just because KAAN has 20cm higher ones means it is a huge problem? (numbers are fictional) or only F22 could solve the issue KAAN is trying to solve and it is deemed impossible? What is the case here? This is all I am asking.

Samba · 2026-11-01T14:43:54-0600

Yasar_TR said:
Those flaps primarily help control pitch; if the nose is to face upwards or downwards. Also gives aerodynamic stability to the plane.
Stealthy planes are inherently very unstable anyway. So they need very good fly-by-wire computer control programs to fly straight. To do that they will need very effective actuators that will respond with very high precision very quickly.

On Kaan these stabilisers are exceptionally large and hence heavy. Certain technologies can be applied (like carbon fibre composites to bring down weight.

In size they are not that much bigger than F22’s. But F22 uses 2D TVC to help with pitch control. In KAAN all the work is expected from these stabilators. Therefore much more excessive stress will be applied to them and to the actuators. But we are not privy to enough knowledge about what precautions Tusas has taken to overcome these difficulties. So unless Tusas states problems, we should not lose confidence in our engineers and Tusas.
As stated above KAAN is a work in progress. It will still be a work in progress when we have 20 or 40 of them in our inventory.

This is what is called "Detailed Post"

2033 · 2026-11-01T15:24:06-0600

The flight delay is causing unnecessary arguments. I hope our KAAN can fly this week.

Polat · 2026-11-01T17:04:38-0600

2033 said:
The flight delay is causing unnecessary arguments. I hope our KAAN can fly this week.

I blame the government for this one to be honest. I would rather hear them tell that the Prototype will fly somewhere in 2027, rather than constantly moving the date with the hope that its flight ready.

Yasar_TR · 2026-11-02T06:24:55-0600

Şok Tedavisi said:
Yeah a new design will be needed to fix those sadly.

Bro, not necessarily!
We don’t know the details of this situation in full.

There is a post by @OPTIMUS that is as it stands -no disrespect to our member- no more than hearsay. But it is a valid technical concern that such a big stabilator will be difficult to manage and will be subjected to intense stresses under heavy manoeuvring. Finding correct actuators to move such large panels under heavy stresses is a difficult engineering problem to solve.

Delays in P1 flight naturally will bring to minds of many certain technical difficulties and hence various reasons are thought of. But as I said before, we do not know the whole story.

Outside sources that were supposed to deliver the correct actuators could easily find technical reasons, delay their delivery and/or reject delivery to stall P1 first flight. We have seen this before.

This doesn’t mean Tusas don’t have the solution. P0 flew with even bigger stabilators. But it did not have to perform a 360 degree roll or make a 9g turn at supersonic speed. This plane will have to do all that and more. The simulation computers will evaluate Altinay’s actuators and once it is given the green light first flight will take place. Altinay would not have taken on the responsibility to produce those actuators if they were not certain they could manufacture them.
Tusas too, will not jeopardise the flight if they are not sure those actuators and stabilators will work. Heck! TurAF won’t accept that plane if they can’t sort out such a major problem. We saw what happened with Hurkus.

My angle on it is, have confidence in Tusas and wait and see!

Saithan · 2026-11-02T06:48:06-0600

So, any guess of what we might face ?

Are the stabiliser such a big problem that KAAN might never enter production. Or would it be prudent to say that the changes could be so big that KAAN would be just another 4,5 gen plane and not stealth. Maybe even just a 4th gen.

How much do they need to cut off to make it viable ?

Yasar_TR · 2026-11-02T07:31:29-0600

Please stay on topic. Do not divulge in to unnecessary discussions.
Administration found @OPTIMUS ’s German post of value and had it auto translated and he has been informed to make sure posts are in English.

Şok Tedavisi · 2026-11-02T07:35:02-0600

Yasar_TR said:
Bro, not necessarily!
We don’t know the details of this situation in full.

There is a post by @OPTIMUS that is as it stands -no disrespect to our member- no more than hearsay. But it is a valid technical concern that such a big stabilator will be difficult to manage and will be subjected to intense stresses under heavy manoeuvring. Finding correct actuators to move such large panels under heavy stresses is a difficult engineering problem to solve.

Delays in P1 flight naturally will bring to minds of many certain technical difficulties and hence various reasons are thought of. But as I said before, we do not know the whole story.

Outside sources that were supposed to deliver the correct actuators could easily find technical reasons, delay their delivery and/or reject delivery to stall P1 first flight. We have seen this before.

This doesn’t mean Tusas don’t have the solution. P0 flew with even bigger stabilators. But it did not have to perform a 360 degree roll or make a 9g turn at supersonic speed. This plane will have to do all that and more. The simulation computers will evaluate Altinay’s actuators and once it is given the green light first flight will take place. Altinay would not have taken on the responsibility to produce those actuators if they were not certain they could manufacture them.
Tusas too, will not jeopardise the flight if they are not sure those actuators and stabilators will work. Heck! TurAF won’t accept that plane if they can’t sort out such a major problem. We saw what happened with Hurkus.

My angle on it is, have confidence in Tusas and wait and see!

When It is politics army does accept faulty stuff sadly, lets not forget first batch of TB2s were faulty and couldnt work under heavy EW in Syria but they fixed it afterwards, I have my confidence on Tusas after seeing Hürjet and Hürkuş II but we all are mortals in the end shit happens you know, even americans had to deal with faulty designs etc. we shouldn't rush anything for the good of project and for our airforce

Şok Tedavisi · 2026-11-02T07:39:17-0600

We can also calm down, even If it takes 10 years TurAF will and still going to be superior against any Neighbouring airforce thanks to our fleet of F16s, Typhoon jets and our sophiscated drone network (we just need to mass produce a lot of layered AD)

Iskander · 2026-11-02T08:50:40-0600

Yasar_TR said:
Bro, not necessarily!
We don’t know the details of this situation in full.

There is a post by @OPTIMUS that is as it stands -no disrespect to our member- no more than hearsay. But it is a valid technical concern that such a big stabilator will be difficult to manage and will be subjected to intense stresses under heavy manoeuvring.

I decided to look into where, when, and by whom the information regarding a potential issue with the KAAN aircraft’s horizontal stabilizers was first raised. Apart from our forum, there is no mention of this anywhere else.
However, I did come across the following opinion on Reddit. That said, in fairness, it should be noted that this is actually referring to something slightly different.
I am quoting it verbatim:

"Messyfingers
1 year ago
There are many aircraft that have their stabilizers positioned at a significant distance [from the center of gravity]. Examples include the F-4, F-15, F-22, and MiG-29. This creates a longer moment arm, which means that relatively small deflections of the control surfaces are sufficient to change the aircraft's flight direction—something that, in turn, results in reduced aerodynamic drag."

https://www.reddit.com/r/aviation/comments/1mb6bhk

OPTIMUS · 2026-11-02T11:41:48-0600

File:YF-22 Lightning II "Rzuty" outline drawing.png - Wikimedia Commons

commons.wikimedia.org

File:Lockheed Martin F-22A Raptor 3-view line drawing.jpg - Wikimedia Commons

commons.wikimedia.org

https://commons.wikimedia.org/wiki/File:F-22_stealth2.jpg#/media/Datei:F-22_stealth2.jpg

File:F-22 AIM-120.jpg - Wikimedia Commons

commons.wikimedia.org

OPTIMUS · 2026-11-02T12:05:37-0600

Pete Mitchell Maverick · 2026-11-02T14:51:47-0600

I believe that we should not share any speculation on the forum unless it has been verified, officially stated by an authoritative source, or directly attributed to TUSAŞ.

Apart from this particular claim, there is absolutely no information or data anywhere suggesting that there are problems with the stabilizers.

I also see people claiming that a potential stabilizer issue would require the aircraft to be completely redesigned. To those people, I simply wish the best of luck in life.

Pete Mitchell Maverick · 2026-11-02T15:14:08-0600

Following the announcement that KAAN P1's maiden flight would take place in May, reports emerged that the flight had been postponed to June. Now, despite having reached November, the aircraft has still not taken to the skies. Naturally, this raises some questions.

It seems that the development process is proving challenging, and setbacks are an inevitable part of it. We know that many aircraft programmes have been delayed by years. Even major companies with decades of experience can encounter significant problems when developing an entirely new aircraft from scratch.

As I mentioned before, Boeing's 777X programme has been delayed by seven years. The F-35 programme has faced similar difficulties, with its timeline being pushed back repeatedly over the years.

It is perfectly normal for KAAN to experience technical delays and development challenges as well. There are hundreds of examples of this throughout aviation history.

Therefore, we should be patient and give the engineers the time they need to overcome these challenges.

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