24 minutes ago, LRBS said:

 

Thanks for the video, in it we can clearly see that when you pass 1,000 FT you are at 30 knots of wind but past 1,000 FT the wind continues to increase, increase, increase.

7 hours ago, UrgentSiesta said:

I'm curious given the current discussion: do you perceive whether it's altitude based or speed based...? I.e., when you fly, I assume you do normal take-offs and approaches, which might make it appear to be influenced by alt rather than speed...?

If iFly and Fenix have implemented this properly, it's enough to get me to move over to them for this factor alone - is that confirmed?

do you or @jcomm know if any of the Hi Fi light GA aircraft implement this properly...? E.g., Black Square or A2A or...?

Will try to find and bring it here !

@Donstim,

are you by any chance my preferred freeware WW2 for XP maker ??? 🙂

I'm curious 🙂

 

In the video example, the wind behaves precisely as intended. The wind speed at the ground is less than prescribed, due to the surface friction, it reaches the prescribed value at about 1000 ft, whereafter it continues to slowly increase with height following the logarithmic wind profile, as it should in the boundary layer. 

1 hour ago, Mark1616 said:

In the video example, the wind behaves precisely as intended. The wind speed at the ground is less than prescribed, due to the surface friction, it reaches the prescribed value at about 1000 ft, whereafter it continues to slowly increase with height following the logarithmic wind profile, as it should in the boundary layer. 

 

This serves as another clear example of why our simulator is flawed. Firstly, individuals like you are quick to argue regardless of the facts and show little understanding of weather phenomena.

 

Certainly, it does not behave "exactly as intended." Surface wind remains surface wind, and the values are independent of surface friction. 33 KTS; it's 33 KTS, no matter the surface friction. This measurement is accurate in its own location.

 

You mention 1,000 FT, but it was actually manually created as a layer up to 10,000 FT to simulate a steady wind up to that altitude.

 

You are not entirely familiar with how wind truly behaves. It is not accurate to say, "it continues to slowly increase with height following the logarithmic wind profile, as it should in the boundary layer." I recommend you learn more about this subject, particularly winds aloft, which can vary greatly with altitude. They can increase or decrease; there is no consistent "logarithmic" wind profile in which the wind increases slowly.

 

I want to share something with you that I hope you'll understand: during preflight, when dispatch handles all the calculations, they consider winds aloft and determine the optimal altitude based on speed, which can sometimes be higher or lower. Often, wind speeds at higher altitudes are lower than at lower ones, and these variations also correlate with different turbulence levels.

Edited February 24Feb 24 by LRBS

1 hour ago, Mark1616 said:

In the video example, the wind behaves precisely as intended. The wind speed at the ground is less than prescribed, due to the surface friction, it reaches the prescribed value at about 1000 ft, whereafter it continues to slowly increase with height following the logarithmic wind profile, as it should in the boundary layer. 

The problem is that it should be at the set speed INCLUDING groundfriction. Data for Wind reports at airports are not gathered 1000ft in the air but on the ground.

So if the tower or METAR reports 10knots, it's 10 knots on the ground and not 1000ft in the air. At 1000ft it will be more.

1 hour ago, Mark1616 said:

In the video example, the wind behaves precisely as intended. The wind speed at the ground is less than prescribed, due to the surface friction, it reaches the prescribed value at about 1000 ft, whereafter it continues to slowly increase with height following the logarithmic wind profile, as it should in the boundary layer. 

Wind is measured at a reference 10m / 30ft for the rw, so, if it's registered at 30 Knot it's not half that... Or any fraction... It's 30 Knot and those will surely hit the tail of most airliners with that intensity...

1 hour ago, Mark1616 said:

In the video example, the wind behaves precisely as intended. The wind speed at the ground is less than prescribed, due to the surface friction, it reaches the prescribed value at about 1000 ft, whereafter it continues to slowly increase with height following the logarithmic wind profile, as it should in the boundary layer. 

Your comment is interesting, but it takes us away from the main topic :

To understand the problem, watch the video :

1/ I set the wind speed to 7 knots and close the window,
2/ I open the window, the speed has increased to 13.61 knots,
3/ I open the window, the speed has increased to 26.45 knots,
4/ I open the window, the speed has increased to 51.45 knots,
5/ I open the window, the speed has increased to 77.17 knots.

Video: https://drive.google.com/file/d/1t9WOcr5eRHF8Wl2RYYGbBPQb5FZqPNPp/view?usp=sharing

 

 

4 hours ago, Mark1616 said:

In the video example, the wind behaves precisely as intended. The wind speed at the ground is less than prescribed, due to the surface friction, it reaches the prescribed value at about 1000 ft, whereafter it continues to slowly increase with height following the logarithmic wind profile, as it should in the boundary layer. 

Another wrong assumption is that, due to friction and boundary layer effects only, wind intensity is reduced with height/altitude...

There are many circumstances under which you can actually observe the opposite, such as:

- Temperature inversions

- Stable boundary layers

- Jetstream low level incursions

- Mountain / valley circulation effects

...

Under such circumstances you can actually experience "negative wind shear".

 

Edited February 24Feb 24 by jcomm

38 minutes ago, Farlis said:

The problem is that it should be at the set speed INCLUDING groundfriction. Data for Wind reports at airports are not gathered 1000ft in the air but on the ground.

So if the tower or METAR reports 10knots, it's 10 knots on the ground and not 1000ft in the air. At 1000ft it will be more.

I agree, but not completely. At 1,000 ft, it doesn’t need to be higher; it can be zero. I selected the arbitrary value of 10,000 ft solely to ensure the wind stays steady during the initial climb. This discussion concerns a programming discrepancy. It would be beneficial for everybody who thinks that the wind only increases with altitude to study rather than make wrong assumptions. 

Since I didn't get a concise answer (this isn't a criticism of the participants in this discussion),

I turned to the flightsimulator.com forum.

The problem stems from this setting:

Topic : https://forums.flightsimulator.com/t/custom-weather-2024-su4-wind-speed-increases/758871

 

5 minutes ago, Area said:

Since I didn't get a concise answer (this isn't a criticism of the participants in this discussion),

I turned to the flightsimulator.com forum.

The problem stems from this setting:

Topic : https://forums.flightsimulator.com/t/custom-weather-2024-su4-wind-speed-increases/758871

 

🙏

30 minutes ago, Area said:

Your comment is interesting, but it takes us away from the main topic :

To understand the problem, watch the video :

I am not sure that many did watch your video as most replies don't seem to have anything to do with the scenario you are showing. 

I am not on my msfs pc atm but if I go on later I will try and replicate what you are showing. If it can be replicated by others then it needs reporting as a bug. As this thread shows there are definitely issues with winds in the sim.

The main problem I have had with wind in the sim is in career missions. Winds at the destination airport are often much stronger than reported at the start of the mission and can be far outside the limits of the aircraft. I have often wondered whether there is some loop or process that is increasing the wind in a way that is unintended. There can also be a problem with extreme in flight turbulence that is similarly extreme.

I should have looked at your thread on the official forum before replying. It seems as if they have already identified as a known bug when using hybrid units.

5 minutes ago, bailout said:

I should have looked at your thread on the official forum before replying. It seems as if they have already identified as a known bug when using hybrid units.

Everything is here :

26 minutes ago, Area said:

Since I didn't get a concise answer (this isn't a criticism of the participants in this discussion),

I turned to the flightsimulator.com forum.

The problem stems from this setting:

Topic containing the verified answer : https://forums.flightsimulator.com/t/custom-weather-2024-su4-wind-speed-increases/758871