Read the OPs initial post again. You are off topic and only causing confusion.
Your strange assertion that Rudder and elevators just change the airflow speed on the vertical and horizontal tail surfaces doesn’t make things more clear either.
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Sorry PLZ but do you really understand what makes a plane fly and turn or you wrote that I made a strange assertion just because it´s wednesday?
Please take a piece of paper, put it below your lower lip and blow fast over it. If the paper lifts you have created a wing or elevator at home. Now put it vertical and blow fast again over one of its sides. If the paper turns you have created a rudder at home. You are welcome.
Cheers
This should be good.
Ouch, so much nonsene hurts.
@geloxo you are doing a fine job of explaining weathervane effect. Problem is, that is not the OPs question or problem. Before you get any deeper, insulting the intellect of seasoned pilots is not going to further your argument whether you are correct or not. I suggest you step back, read the thread again from the beginning before rejoining the conversation, if you have some insight that may solve the problem.
The issue being discussed in this thread is erratic movement of the control surfaces without input from the pilot. Even in a 100 year old biplane, the rudder is not going to move if the pedals don’t move. Some minor flutter in a breeze is to be expected due to cable slack but it surely is not going to ‘hard over’ without a resultant stick or pedal movement.
In an airliner, there is NO chance that the rudder is going to experience un-commanded movement. There has to be either a control bug, noise in control input, or possibly a binding issue if the rudder moves and the pedals in the cockpit do not. This may be caused by a runaway rudder trim or something not directly tied to the axis. It is possible that a RUDDER LEFT or RUDDER RIGHT digital binding is involved.
I would suggest creating a new default profile and clear ALL bindings except the AXIS controls to determine if there is an issue with the controller first.
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@DoctorAcorn, may I suggest that the checkmark you activated in post #5 be deselected as this is clearly not wind related.
I have a feeling this may be where your problem lies. Be sure that you are using the axis controls for rudder and not the binary left and right bindings. With the binary control the rudder will continue to move left at a fixed rate as long as the left trigger is depressed. As the word binary applies, it is either on or off not an analog proportional control.
Do you see that the 747 rudder is moved in my pics? No, its perfectly centered but plane still turns into the wind after running some meters. Do this simple test and you will see yourself as well. Feel free to think that controls are bugged in game. What you are suffering is just plain physics. If saying that is insulting someone´s intellect then fine, let it be. I didn´t invent physics myself.
I said like 3 times that I agree that the physical effect can be overpowered in game for airliners but definitely it´s there in game and you need to compensate it. I never said that this is realistic just that it appears to be the reason causing the turns in game.
If you still don´t believe it try without any rudder HW plugged into game or setting a 90% deadzone for the rudder control. The OP thinks that the rudder is artificially moved because he sees in the video that the A320 rudder moves in the external view and it does indeed but when there´s wind only. If test is repeated with no wind there´s no 3D model rudder turn nor plane turn. This could be a bug in the A320 3D model sure but the cockpit pedals stay centered all the time as I explained and I didn´t see any disturbance on them. But if the OP does the tests with the 747 he will realize as well that rudder is not moving nor in the 747 3D model nor in the cockpit view but plane is still turning into the wind.
If someone else than a seasoned pilot, the OP or the king of spades does the test with a Cessna (as it has no FACs nor anything else that may be producing possible rudder corrections by a wrong game implementation you are just testing the flight surfaces themselves) he will see the same results. It turns into the wind and it does not turn when there´s no wind.
If after that you still think that physics nor wind have no effect in game behaviour you can take a coffee or something. I can´t do anything else and as I´m not the developer I can´t say what is put into the source code. I just gave my opinion trying to help here.
Cheers
My friend, we all agree that weathervane effect is real. We all agree that the aircraft will nose into the wind. We all agree that that is how the physics work. Some of us are fairly well versed on how airplanes work.
Most of us also agree that IN THIS PARTICULAR CASE physics, wind and weathervaning is NOT what we are discussing. We are discussing what may cause erroneous un-commanded rudder movement. This does not appear to be a widespread problem. This is not a case where the user is being blown off the runway. This is a case where a particular user is seeing their rudder move without any known input. This is also not the first time this problem has been observed.
And how do you explain then than without wind the A320 rudder does not move and the aircraft stays centered as well? Even better. To discard that AI assists can be causing this do the test trying to intentionally move away from center line using the rudder yourself without any wind. Tell us what you see. Does the plane has erratic movements in this case? I already tried and it has no effect.
So if HW is not causing it, AI if assistance is not causing this and human pilot is not causing this, what else is left? I understand what you mean but I just tell here what I have seen in the tests myself.
Cheers
If you are still encountering this problem, can you try setting the neutrality to -100 for both triggers and a small amount of deadzone so that the “spike” is removed. I’ll find the post with a picture and edit the link in for more information.
Edit: See here…
This prevents the two axes from interfering with one another and gives a much improved and fluid response.
But you are not testing it on the OPs XBox.
I have no issue. I cannot test their settings. All your testing and instruction on physics is not only valid but equally appreciated, as I am sure there are many users that have been buffaloed by the behavior of aircraft on the ground until they gained the proper knowledge.
In some cases however, due to a lack of knowledge or understanding of some of the bindings and control settings, some users have had strange behavior that has nothing to do with aerodynamics. You have your controls set up correctly and your sim works as expected. Unfortunately this does not hold true for all users. If the users settings are wrong, they may experience behavior that can not be duplicated on someone else’s sim.
Yes true, I use PC. But I have seen exactly the same bahaviour as seen in the OP´s video with the A320 in my PC. If HW was the reason the cockpit controls would move because the input would come into the sim anyway (if it was wrong, bad centered or faulty). I didn´t see cockpit controls being moved in my case at least but I saw the rudder moving in external view as the OP did. If it was an AI assist it will be trying to keep you centered in all situations, with wind and without wind. In my case I only see the problem when there´s wind. If you don´t push the pedals yourself then human error is not the case either. I did the tests without touching anything else than the parking brake release and the power lever.
I mean… I don´t see any additional reasons. I even checked that both engines were working at the same % (indeed I have a single axis for both of them) so they are synchronized.
Cheers
Careful with your insults captain happy, you are talking to two of the (probably) most experienced pilots on the forum (@PZL104 and @willisxdc).
I don’t have any issues on my PC. Wind can’t be the issue, no matter the wind, the rudder is not gonna move by itself, especially on an aircraft with hydraulic flight controls like the Airbus.
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Mmmm… Is the second time I read about insults. Can you please tell me which insults I wrote?
By the way I insist again: I never said that wind is going to move the rudder but only that the different airflows on the sides of the surfaces creates forces on those surfaces due to difference of pressures. One of those surfaces is the tail (the vertical portion). Tail turns and then the whole plane turns but not rudder turns due to wind. This is different to have a magic movement of the rudder, so please let´s try to understand each other before posting, and specially before talking about insults.
In game rudder moves while in the external view in the A320 as seen in the posted video and I confirmed that I also saw it moving like in the video but this is only reproduced with wind. Nothing else than that. Two or three posts above you can see I wrote that this may be a bug in the 3D model of the A320 as the 747 does not have any visible 3D model rudder effect but it still turns. Above that are the 5 tests I did to check it in the A320 case, followed with the pics of the 747 tests.
Is this clear now? Are we on the same page?
Cheers
Not very polite, lets name it that instead of insulting. On the same page?
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Much better now thanks. Yes we are.
Cheers
I have witnessed a great deal of what I call ‘spikes’ with the rudder in MSFS 2020 prior to buying a USB Logitech Pro Pedals controller. As the problem has gone away for me, it had to have been the old gameport CH Pro Pedals hardware which I was using with an adaptor. The problem did improve when I connected to a USB 2.0 hub, alas not totally perfect. It was totally impossible to centre the rudder too even when trying to use trim. Sometimes while I was taxing the rudder would spontaneously slam to the right or left and twitch which really killed the immersion. While attempting a side-slip, on exit the aircraft would sway uncontrollably left and right several times. This was definatelly a killer of an effect because I crashed the landing! 
I recall that it was possible to dampen so-called spikes using FSUIPC, (from what I recall) when using earlier versions of MSFS.
Do please consider looking at the link that I posted above about using USB 2.0 ports instead of USB 3.0 for your game controllers.
Take care everyone…
BRGDS Charles.
Check that your flight model is set to modern. If it is, switch to legacy and back to modern.
Thanks for the info aviator. Indeed I had exactly the same issue as I own the CH Pro as well. In my case I solved it just by adjusting sensitivity in game using a S shape curve and a 1% deadzone. That allowed me to have better control near the center position and reduce the oscillation you describe on the controller input to game while pedals should be centered. I didn´t face any sudden rudder movements since then and I had a lot as you too.
The default config in game was linear I think and that created massive turns with just a small pressing which was crazy during taxi and while airbone too. There´s a pic I shared with that config some posts above too in case it helps others too.
Cheers
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Geloxo,
There were times when my aircraft just decided to depart from the runway dramatically and head off over the grass towards the terminal during take-off! Not a very desirable characteristic! 
I am so please with my Logitech Pro Pedals, the distance between the pedals is more consistent with an ‘tubeliner’ than a C152 which are quite close together. I don’t feel that the tensioning dial in the middle does much really. I have seen other people reporting the ‘spiky’ rudder movements too, fortunately I no longer have this problem and steering with the aid of toe breaking is a real boom.
I wish they would implement body gear steering in the 747 like the real thing as that would be really cool!
Take care, BRGDS.
Here is a video about what the 747 has in common with a bulldozer! 
I have been on a 747 when body gear steering is being used, it’s amazing that such a large aircraft can turn like a tank! I am not sure that many people using this forum are aware of body gear steering, I have not heard it mentioned here. We should vote for body gear steering!
It looks like MSFS 2020 is being used in the video?
Charles.
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