correct as is Aileron Position after C&D

[NoPro]

I‘m not sure and I would guess that I’m the problem here but after a cold and dark start up, doesn’t matter if its a self made mission or the first training mission, I can’t get this thing to fly straight. NO FFB JOYSTICK IS USED.
 

 AFCS bit Test is successful and I trim everything back to neutral. Soon after liftoff the aircraft banks to the left, so I put in some right trim, even though it shouldn’t bank as there is no wind, no loadout, nothing. After minimal right trim input, the aircraft banks to the right and so it continues the whole flight, left, right, left, right. Pitch trim is fine and I do get a perfect level flight but aileron. When using a hot start mission or the second training mission, all works well and no issues as I don’t have to touch the aileron trim. Unfortunately the controls indicator is not working at the moment, so I can’t check the trim positions as I think the „trim neutral lamps“ do have a bigger range and are not exactly neutral when lit. Any ideas how I can get this thing to fly straight after a C&D start up? Anyone experienced the same? 
 

cheers
 

 

[RogueRunner]

I do find the trim increments is a little coarse yes, difficult to get it perfect while flying at a constant speed and attitude. 

[Flia]

It would be great if we could adjust the trim sensitivity in DCS.

[NoPro]

1 hour ago, Flia said:

It would be great if we could adjust the trim sensitivity in DCS.

You can, I adjusted mine in the config file from 1.0/-1.0 to 0.4/-0.4. It‘s the same procedure as with the F4 Phantom. But still struggling to get it lined up perfectly except if you press the Trim reset button, but this also cancels your pitch trim 

[RogueRunner]

6 minutes ago, NoPro said:

You can, I adjusted mine in the config file from 1.0/-1.0 to 0.4/-0.4. It‘s the same procedure as with the F4 Phantom. But still struggling to get it lined up perfectly except if you press the Trim reset button, but this also cancels your pitch trim 

although not ideal a stopgap maybe, which file?

[NoPro]

12 hours ago, RogueRunner said:

although not ideal a stopgap maybe, which file?

Your DCS Open Beta folder —> Mods —> Mig29 Fulcrum —> INPUT —> Keyboard—> default.lua and then search for „trim“. If you need further assistance, just let me know

Edited Friday at 09:54 PM by NoPro

[Flia]

12 hours ago, NoPro said:

Your DCS Open Beta folder —> Mods —> Mig29 Fulcrum —> INPUT —> Keyboard—> default.lua and then search for „trim“. If you need further assistance, just let me know

Thank you very much for this tip 

[NoPro]

Don't know how much a track file would help without seeing the controls indicator but here you go ED @BIGNEWY, instant action takeoff mission on the caucasus map. I did tap my aileron trim so that it is out of 'neutral' and then back so that the 'neutral lamp' is illuminated and after liftoff I didn't touched my x-axis on the stick and the aircraft is banking to the left even though everything should  be neutral. If you need something more, just let me know.

 

cheers

Aileron Trim.trk

[markymarc8311]

I had a similarish problem and "trimer - reset" fixed me up. Hope it works for you dude

[NoPro]

On 9/21/2025 at 2:54 AM, markymarc8311 said:

I had a similarish problem and "trimer - reset" fixed me up. Hope it works for you dude

It does, yes and after start up it is no problem at all to use this button but if you‘re in flight and trimmed with pitch and/or rudder….you‘ll be messed up with all trims just because of the aileron trim is apparently not neutral even though the lamp is illuminated

[addman]

I'm seeing the same issue here after C&D start-up. I run the AFCS test with no problems except that I have to trim aileron and elevator after it's done. But even though these axis are indicated as neutral, after take-off it banks a bit to the left. Have no idea why this is happening but I just use the trimmer reset button as suggested above. But I don't get why I'm having this issue as well.

[BIGNEWY]

On 9/20/2025 at 9:46 PM, NoPro said:

Don't know how much a track file would help without seeing the controls indicator but here you go ED @BIGNEWY, instant action takeoff mission on the caucasus map. I did tap my aileron trim so that it is out of 'neutral' and then back so that the 'neutral lamp' is illuminated and after liftoff I didn't touched my x-axis on the stick and the aircraft is banking to the left even though everything should  be neutral. If you need something more, just let me know.

 

cheers

Aileron Trim.trk 1.84 MB · 0 downloads

Thanks we will take a look, the controls indicator is fixed internally and will be in a future update. 

[BIGNEWY]

The lamp wont light up at a precise point, the sensor lights up when it thinks it is neutral, almost like in a dead zone. 

we have checked and its not a bug. 

thank you 

[addman]

4 minutes ago, BIGNEWY said:

The lamp wont light up at a precise point, the sensor lights up when it thinks it is neutral, almost like in a dead zone. 

we have checked and its not a bug. 

thank you 

So you are saying that it IS in neutral position after AFCS test even though the trim neutral lamps aren't lit?

[draconus]

25 minutes ago, addman said:

So you are saying that it IS in neutral position after AFCS test even though the trim neutral lamps aren't lit?

He's saying that the lamp and sensor work for some range that's considered neutral. It is not a precise point that'll give you hands-free flight and it's also not the trimmer's job. Use AP instead.

This comes up for every module and it's just misunderstanding of the trimmer function. Hence the trim sensitivity workarounds because people apparently want their aircraft to fly on rails

[addman]

Ok, so the aircraft is supposed to bank to the left after successful AFCS test and take-off?

[draconus]

2 minutes ago, addman said:

Ok, so the aircraft is supposed to bank to the left after successful AFCS test and take-off?

It can bank either way. They are not perfectly made nor perfectly balanced in weight.

[Hiob]

1 minute ago, draconus said:

It can bank either way. They are not perfectly made nor perfectly balanced in weight.

This.

Nor is the air itself perfectly still. (Well in DCS it can be, but that's unrealistic in itself)

[Dača]

I flown MiG-29 FC3 without issues and rarely used trim.

You'll be good, even without pin point precision.

[BIGNEWY]

If you check out Wags cold start video you will see him do the the trim test AND check trim neutral lights before takeoff.

thank you 

[NoPro]

2 hours ago, BIGNEWY said:

The lamp wont light up at a precise point, the sensor lights up when it thinks it is neutral, almost like in a dead zone. 

we have checked and its not a bug. 

thank you 

Thanks @BIGNEWY, much appreciated. That‘s I was looking for. Now I know that even if the neutral lights are lit, doesn’t mean the aircraft is in actual neutral trim and we do have a small trim range even with illuminated neutral lights. Thanks 

[Jef Costello]

On 9/19/2025 at 11:54 PM, NoPro said:

Your DCS Open Beta folder —> Mods —> Mig29 Fulcrum —> INPUT —> Keyboard—> default.lua and then search for „trim“. If you need further assistance, just let me know

Hi NoPro could you give us a line number please?

[C525]

3 hours ago, draconus said:

It can bank either way. They are not perfectly made nor perfectly balanced in weight.

 

3 hours ago, Hiob said:

This.

Nor is the air itself perfectly still. (Well in DCS it can be, but that's unrealistic in itself)

Both true. However, if you have flown any aircraft in real life, you know that you get much more feedback how the aircraft is behaving in the air whilst at the controls. Trying to manipulate switches or turning your head while in close formation makes it more difficult to stay in place when you also have to constantly trim, because the trim inputs required are less than one click. Just my two cents.

[NoPro]

1 hour ago, Jef Costello said:

Hi NoPro could you give us a line number please?

Will do, once I‘m home