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Surface Wind

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Have to find where I can get that SimVar watcher from 🙂

Flying gliders since 1980

Flightsimming since 1992

AMD Ryzen 5600x, 32GB RAM, GPU Nvidia RTX 3060 Ti 8 GB, 1 TB and 500 GB nvme2 SSD drives, HP 27" 60Hz LED monitor @ 1920x1080, T16000, Hotas from old X52 Pro, Saitek Combat Rudder Pro (2010 model)

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  • MattNischan
    MattNischan

    What I have confirmed is that there is no systemic problem with the sim itself, at all. You can't just go and change everyone's already tuned planes, thus parameters are opt-in. All a developer n

  • MattNischan
    MattNischan

    Indeed, that would be good! So let's do that. 🙂 FSX and before automatically reduced the wind at the player aircraft location at the surface by half in order to combat the limited ground friction

  • MattNischan
    MattNischan

    You may think that, but that's not how the effect is implemented under the hood. As I said before, it decreases the actual wind at the aircraft position (not just the wind the aero sim experiences), a

  • Author
1 hour ago, Donstim said:

Sure it is. Which airplane did you use? See below screenshot for the default 787-10. I also included the Simvar watcher window, which shows exactly what wind is being applied in MSFS (that is, for the default ground crosswind parameters it will show half the crosswind that is input in the weather UI). The ambient wind velocity/direction and ambient wind X (crosswind) all show the full 20 knots of crosswind being applied.

@jcomm the Simvars show wind direction referenced to true. Since the ambient wind direction Simvar is the same as the wind direction that was input in the UI, this implies that input winds are referenced to true. Note that the 787-10 cockpit wind display shows a different direction, which is different by approximately the magvar for that runway. Normally wind direction shown on airplane NDs is referenced to true, but I don't know if that's the case with the 787. If it is, then there is something either messed up with the display coding, or there is something odd about manually input wind direction in MSFS and the Simvar depiction of it.

Screenshot 2025-03-30 080741.jpg

So, I used ms2020 at jfk 31l wind 230/16 with pmdg738, 748, 172, 208, 320. Same wx in ms2024 with the same default 748, lcf, 172, 208, 320, 330. See the pics. Rightfully so, in your example, it is correct. As it was mentioned, we concluded that when wx is injected by live wx, there is no issue, only when manually triggers that problem. 
See the next pics out of the KSEA manual wx, 080/20; the last one is on msfs2024.
 
1.png
2.png
 
 
2024.png
 
The same scenarios were tested on two other different computers with the same results. I'm wondering what's going on here.
 
 
 
 
 
 
 
 
 

747 Captain for the last 39 years, and still learning. 

1 hour ago, LRBS said:
1.png
2.png

 

 
The same scenarios were tested on two other different computers with the same results. I'm wondering what's going on here.
 
 
 
 
 
 
 
 
 

Good question. Are you manually entering or confirming the correct value for the 2 ground crosswind parameters into the Flight Tuning section of the flight model.cfg file and making sure there isn't a different entry later in the file?  Are you doing this before starting MSFS?  I just confirmed that the PMDG 737-700 works the same way I showed for the default Asobo 787-10 once I manually edited the 2 crosswind parameters to change their values to -1000. Screenshot below. The true vs mag heading issue remains as well. Not sure about that one.

Screenshot 2025-03-30 114058.jpg

2 hours ago, jcomm said:

Have to find where I can get that SimVar watcher from 🙂

If you install the MSFS SDK, Simvar.exe should be in C:\MSFS SDK\Samples\SimvarWatcher\bin\x64\Release

That's for MSFS 2020. I don't know if it would be any different for MSFS 2024.

Edited by Donstim

  • Author
1 hour ago, Donstim said:

Good question. Are you manually entering or confirming the correct value for the 2 ground crosswind parameters into the Flight Tuning section of the flight model.cfg file and making sure there isn't a different entry later in the file?  Are you doing this before starting MSFS?  I just confirmed that the PMDG 737-700 works the same way I showed for the default Asobo 787-10 once I manually edited the 2 crosswind parameters to change their values to -1000. Screenshot below. The true vs mag heading issue remains as well. Not sure about that one.

Screenshot 2025-03-30 114058.jpg

I'm truly confused. All the entries are there, with the same wind as you have, but I haven't had any success. I have to leave on my trip for a week. If you find anything or anybody else, please send me a message. Two other (pilot) friends are experiencing the same issue. I wonder why three different computers experience the same problem and others don't. By the way, is anybody else here reading these posts seeing this behavior? 

747 Captain for the last 39 years, and still learning. 

55 minutes ago, LRBS said:

I'm truly confused. All the entries are there, with the same wind as you have, but I haven't had any success. I have to leave on my trip for a week. If you find anything or anybody else, please send me a message. Two other (pilot) friends are experiencing the same issue. I wonder why three different computers experience the same problem and others don't. By the way, is anybody else here reading these posts seeing this behavior? 

Interesting. Have you tried it with the default Asobo 787-10?  I think that one has the crosswind parameters set to use the real wind by default. At least, I don't remember having to change them.

2 hours ago, Donstim said:

If you install the MSFS SDK, Simvar.exe should be in C:\MSFS SDK\Samples\SimvarWatcher\bin\x64\Release

That's for MSFS 2020. I don't know if it would be any different for MSFS 2024.

It works with both 2020 and 2024

Jim Barrett

Licensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.

The weather addon ActiveSky, which sets weather in MSFS by making changes to a weather preset file, has an option called "surface wind attenuation cancelation" which is accompanied by the following explanation:

"Enable this option to have the surface wind layer speed doubled to cancel MSFS forced attenuation (reduced wind speed at surface) when using Preset weather with AMSL altitudes" (emphasis mine)

This might relate to the observations of live weather vs. manually set weather in this thread.

13 hours ago, JRBarrett said:

It works with both 2020 and 2024

Installed the SDK, but couldn't find an executable for "Simvar Watcher" ?

Also apparently I will also need to install VisualStudio 2017 (???) to be able to open the associated project file... Nah 😕 not going to do that I guess...

If there was some way to run the "Watcher" without having to install VS I might consider it.

Edited by jcomm

Flying gliders since 1980

Flightsimming since 1992

AMD Ryzen 5600x, 32GB RAM, GPU Nvidia RTX 3060 Ti 8 GB, 1 TB and 500 GB nvme2 SSD drives, HP 27" 60Hz LED monitor @ 1920x1080, T16000, Hotas from old X52 Pro, Saitek Combat Rudder Pro (2010 model)

18 minutes ago, jcomm said:

Installed the SDK, but couldn't find an executable for "Simvar Watcher" ?

Also apparently I will also need to install VisualStudio 2017 (???) to be able to open the associated project file... Nah 😕 not going to do that I guess...

If there was some way to run the "Watcher" without having to install VS I might consider it.

You only need to install VS if you want to compile the program yourself. The folder contains a pre-built executable that you can run directly. When you install the SDK, you need to install the optional “Samples” folders. The simvar watch program is in there.

Edited by JRBarrett

Jim Barrett

Licensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.

1 hour ago, JRBarrett said:

You only need to install VS if you want to compile the program yourself. The folder contains a pre-built executable that you can run directly. When you install the SDK, you need to install the optional “Samples” folders. The simvar watch program is in there.

Ah! Thank you!  Will check that - install the "Samples" folders? Ok, I'll try that.

Big thanks !

Flying gliders since 1980

Flightsimming since 1992

AMD Ryzen 5600x, 32GB RAM, GPU Nvidia RTX 3060 Ti 8 GB, 1 TB and 500 GB nvme2 SSD drives, HP 27" 60Hz LED monitor @ 1920x1080, T16000, Hotas from old X52 Pro, Saitek Combat Rudder Pro (2010 model)

8 hours ago, Magenta Line said:

The weather addon ActiveSky, which sets weather in MSFS by making changes to a weather preset file, has an option called "surface wind attenuation cancelation" which is accompanied by the following explanation:

"Enable this option to have the surface wind layer speed doubled to cancel MSFS forced attenuation (reduced wind speed at surface) when using Preset weather with AMSL altitudes" (emphasis mine)

This might relate to the observations of live weather vs. manually set weather in this thread.

By jove, you've found it. I had my winds set with AGL for exactly this reason. I had found this some time ago, and that is why I changed to using AMGL, but had completely forgotten about it. @LRBS If using the AMSL altitude basis for preset weather, the winds are halved for some reason. The total wind velocity is halved, so both headwind/tailwind and crosswinds are affected. (Don't ask me why!☺️)

  • Author
1 hour ago, Donstim said:

By jove, you've found it. I had my winds set with AGL for exactly this reason. I had found this some time ago, and that is why I changed to using AMGL, but had completely forgotten about it. @LRBS If using the AMSL altitude basis for preset weather, the winds are halved for some reason. The total wind velocity is halved, so both headwind/tailwind and crosswinds are affected. (Don't ask me why!☺️)

No, I didn't think it could be any other way than AGL. Gentlemen, thank you very much for your effort. I'm using a VPN, and I'm not sure if this will work. Someone did a new MSFS installation, and now it is running fine on his PC. I hope that in a week, when I get home and do a re-install, it will also resolve my issue.     THANK YOU!

747 Captain for the last 39 years, and still learning. 

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