FFB Issues

[Tea-Pig]

Thanks to M3 for making the effort to implement force feedback on the F4U.

However there appears to be a bug in that the stick kicks once every 16 seconds when the engine is not turning. This can be observed in any of the cold start instant action missions. The kicking seems to go away as soon as the engine starts but returns when it stops, including in the air after the engine has seized (which seems to happen to me quite often).

Also the frequency of the stall buffet seems very high to me. It doesn't really feel like a turbulence effect, more like a buzzing vibration. Great if you're a lonely lady but not so good for a pretend warbird pilot.

Both of these issues observed on a Moza AB9 in Direct mode and on a Sidewinder2.

[GTFreeFlyer]

Interesting. I have the AB9 and am not getting a tick when engine is not running.  Maybe something with your PC processor is getting bogged down and the tick is a side effect in the FFB data stream?  I honestly have no clue how that works, just taking a wild guess.  
 

I have also reported stall FFB behavior.  I think it’s occurring too early, at lower AoA than necessary because I’m able to continue pulling much higher G’s and alpha before the wing actually stalls.   Rudel has asked for a track file.  For some reason my track file generation is broken and DCS gives me an error when I try to save one.  I probably just need to do a repair.   Perhaps you can attach one so the devs can get a hold of it?

[Tea-Pig]

Ok, so maybe just me then. I can't see it being a problem with my system as it doesn't happen with any other plane.

Track attached.

Corsair-FFB-twitch01.trk

[Razgriz10]

After the latest update with them finally implementing trim ffb, the trim for me is backwards, when intrim forward my stick moves aft and vice versa. I looked through my settings and everything there is correct.  I have the moza ab9.

[Tea-Pig]

@Razgriz10 You just need to reverse the FFB direction for the Y axis in the DCS controls menu. 

[Panzuur]

On 9/20/2025 at 5:39 AM, Tea-Pig said:

@Razgriz10 You just need to reverse the FFB direction for the Y axis in the DCS controls menu. 

This worked for me to correct the trim moving the stick the opposite it should, hopefully they will fix that the trims should not move the stick at all in the next patch.

[GTFreeFlyer]

4 hours ago, Panzuur said:

This worked for me to correct the trim moving the stick the opposite it should, hopefully they will fix that the trims should not move the stick at all in the next patch.

…but if you trim, and the control surface takes on a new position, and the control surface is directly connected to the stick via cables and pulleys, then it should move the stick, no?  I haven’t flown a real Corsair (still waiting for someone to offer!), so I’m asking, not correcting you.  Cheers.  

[Hiob]

5 hours ago, Panzuur said:

This worked for me to correct the trim moving the stick the opposite it should, hopefully they will fix that the trims should not move the stick at all in the next patch.

The stick is supposed to move with trim, like in every other non-fbw aircraft. And as others pointed out, you just need to reverse the ff direction in the control options and all is good again.

[Panzuur]

Technically on a Warbird , the trim moves the trim tabs on the control surfaces, not the control surface itself so when trimming, the tabs move not the control surfaces, thus the stick should not move. 

[Hiob]

10 hours ago, Panzuur said:

Technically on a Warbird , the trim moves the trim tabs on the control surfaces, not the control surface itself so when trimming, the tabs move not the control surfaces, thus the stick should not move. 

What do you think is the effect that the trim tabs have on the control surfaces?  Why do you think they are placed on outer most edge of the control surfaces?

You should do some more research on the physics of aviation. 

To put in no uncertain terms: The trim tabs are moved into the airstream to exert a displacement force on the actual control surfaces, which consequently will have a new equilibrium position in the airflow (and with that move the stick which has a fixed connection to the surfaces). Trim tab goes up, control surface goes down, stick goes forward. (for pitch trim)

 

 

Edited 20 hours ago by Hiob

[GTFreeFlyer]

Yup, this one confuses lots of people initially.  Trimming nose up will move the trim tab on the elevator down, not up.  Same principle with the other control surfaces.  

[Panzuur]

6 hours ago, Hiob said:

What do you think is the effect that the trim tabs have on the control surfaces?  Why do you think they are placed on outer most edge of the control surfaces?

Better do some more research on the physics of aviation. 

To put in no uncertain terms: The trim tabs are moved into the airstream to exert a displacement force on the actual control surfaces, which consequently will have a new equilibrium position in the airflow (and with that move the stick which has a fixed connection to the surfaces). Trim tab goes up, control surface goes down, stick goes forward. (for pitch trim)

 

Ok, I stand corrected, I do need to research this more, I don't fully understand this.

[Hiob]

3 hours ago, Panzuur said:

Ok, I stand corrected, I do need to research this more, I don't fully understand this.

No Problem. Sometimes we have preconceived misconceptions and become stuck with a wrong idea.

Happens to me all the time.

Wasn't meant to be condescending. Sorry for the wording - it was late.

This stuff becomes increasingly interesting when you dive into it.

Fortunately in todays world there is plenty of good material to be found on YT.

The Video I put there for visualization probably isn't even very good. It was just the first I found that showed this particular effect.

I learned a lot about aviation in general by following some good youtube channels like Mentour Pilot e.g.

 

[Panzuur]

5 hours ago, Hiob said:

No Problem. Sometimes we have preconceived misconceptions and become stuck with a wrong idea.

Happens to me all the time.

Wasn't meant to be condescending. Sorry for the wording - it was late.

This stuff becomes increasingly interesting when you dive into it.

Fortunately in todays world there is plenty of good material to be found on YT.

The Video I put there for visualization probably isn't even very good. It was just the first I found that showed this particular effect.

I learned a lot about aviation in general by following some good youtube channels like Mentour Pilot e.g.

 

I watched some YouTube videos and GTFreeFlyer helped me and now I understand, I was 100% wrong in my assumption,  I have learned something new which is awesome, Thanks!