Thanks to @lwt1971 for pointing this out.  There will be a 20 kilometer CFD surrounding the plane, that will be coming to MSFS. I think it's probably SU 11 that it will come, with the thermals for gilders.  This is what Seb said about the 20 kilometer CFD a few months ago:

Quote

Something we are currently working on that will not be for Sim Update 10: The problem with this system is that it works very locally and generates local thermals that don’t combine when they go up. The air that goes up somewhere else needs to go back down. It doesn’t create any vortices, turbulence on the side of thermals, anything like that yet. So there’s research work going on that took the CFD of the airplanes and expanded that 20-ish km around the plane. So that’s a really, very, very, very big CFD running and it goes pretty high as well. And we hope that sometime this year, we’ll to get that to simulate the airflows in the atmosphere to get nicer updrafts that can combine so that only bigger fields get updrafts when you go higher up, that you get vortices with air going back down, and all sorts of different local wind effects that we don’t really get from live weather. Live weather gives us wind gusts and direction, but it’s something a bit more for the area.

 

Honestly, i think the priority should be to get the Sim stable, rather than this fluffy stuff.

13 minutes ago, pan pan pan said:

Honestly, i think the priority should be to get the Sim stable, rather than this fluffy stuff.

"Fluffy stuff" lol? You realize this all helps to more accurately simulate atmospheric airflow around the aircraft and ultimately the flight dynamics in said environments right? Also very important for gliding/soaring which is why it's targeted for SU11 (40th anniv edition). And as per always, just because they are working on important new features like this doesn't mean they are *not* working on getting the sim more stable, as evidenced by all the service releases so far.

Edited September 2, 20223 yr by lwt1971

30 minutes ago, pan pan pan said:

Honestly, i think the priority should be to get the Sim stable, rather than this fluffy stuff.

You do know that MSFS is a flight sim, right? In which the air you fly through is one of the... no, simply THE most important part? No air, no flightsim... So 'fluffy' isn't exactly the right word to describe what Asobo is trying to do here. 😉

12 minutes ago, pan pan pan said:

Honestly, i think the priority should be to get the Sim stable, rather than this fluffy stuff.

They're fixing stability issues all the time. Also, solving CTDs isn't a very straight-forward or predictable thing to do. You need enough information on how to reproduce them, and even then, it may not be clear how to fix it because the underlying issue happens in a different place in the code where it corrupts some data, and the CTD happens when the corrupt data is used. And some of them only happen in a specific hardware/driver/software environment, which makes it near impossible to reproduce for a dev.

I'm all for improving stability, but this shouldn't prevent the team from working on new features. Sometimes I would've preferred them to take some more time for new stuff to mature before release, but I have the feeling this has been getting better recently with beta testing the Sim Updates.

43 minutes ago, pan pan pan said:

Honestly, i think the priority should be to get the Sim stable, rather than this fluffy stuff.

I understand your sentiment, but they need to fix things as they go, while also developing the sim, otherwise we will be waiting a long time for things such as gliders and proper helicopter dynamics etc.

 

I wouldn't get my hopes up for su11. The new prop model also took longer than they expected. 

If they do it this year, I'll be happy. I'm pretty hyped though. 

As a side note, the dev q&a sessions are always quite interesting, I suggest interested people like in this thread follow them.

1 hour ago, pan pan pan said:

Honestly, i think the priority should be to get the Sim stable, rather than this fluffy stuff.

Sim is and remains stable for me. Perhaps it’s you?

41 minutes ago, rka said:

As a side note, the dev q&a sessions are always quite interesting, I suggest interested people like in this thread follow them.

Absolutely, I didn't discover this until recently but their community management team go to the trouble of transcribing all Q&As word-for-wrod denoted with timestamps etc, so it's very handy... they use a special tag for these on their forums so just keep monitoring https://forums.flightsimulator.com/tag/q-and-a-replay , the most recent Q&A is yet to be transcribed.

13 minutes ago, lwt1971 said:

Absolutely, I didn't discover this until recently 

I think this video shows some of the 20 kilometer CFD around the airplane: 

My memory is pretty bad, but there may have been another Dev Q&A where they showed more about the 20 kilometer CFD that would envelop the plane. If somebody else remembers another Dev Q&A where they showed video on the 20 kilometer CFD, please post it here.

 

 

Edited September 2, 20223 yr by abrams_tank

Whats a CFD?

1 hour ago, lwt1971 said:

"Fluffy stuff" lol? You realize this all helps to more accurately simulate atmospheric airflow around the aircraft and ultimately the flight dynamics in said environments right? Also very important for gliding/soaring which is why it's targeted for SU11 (40th anniv edition). And as per always, just because they are working on important new features like this doesn't mean they are *not* working on getting the sim more stable, as evidenced by all the service releases so far.

And the percentage of MSFS users  that fly gliders is what, maybe 1% at most. 

2 hours ago, abrams_tank said:

Thanks to @lwt1971 for pointing this out.  There will be a 20 kilometer CFD surrounding the plane, that will be coming to MSFS. I think it's probably SU 11 that it will come, with the thermals for gilders.  This is what Seb said about the 20 kilometer CFD a few months ago:

 

I guess regardless of the 40th anniv edition being delayed or being released on the currently planned date Nov 11th, the new CFD powered airflow and flight dynamics improvements will be coming with that release for sure, since it'll introduce gliders and helicopters as a core part of the sim.  Seb also mentioned that visualizations of this atmospheric airflow can be enabled. I'm really looking forward to this, and the part about vortices and various other local airflow/wind effects being simulated gives a sneak peek into how advanced this might be. Hopefully they'll do deeper dives on these advancements in their upcoming Feature Discovery Series videos on Oct 20 and Oct 27: https://www.avsim.com/forums/topic/623550-september-1st-2022-development-update/)

Those with more powerful hardware should be able to increase the resolution of the Navier-Stokes equations calculations behind this CFD, just like we can do now for local CFD directly on/around the aircraft. i.e: https://docs.flightsimulator.com/flighting/html/Developer_Mode/Aircraft_Editor/Debug/Debug_Aircraft_CFD.htm
The CFD currently proposed uses a default of 20 x 20 x 20 cubic voxels that englobe the aircraft. When enabled, the simulation will then solve a custom version of the Navier Stokes equations that includes upwind advection solving designed to cope with high fluid velocities. The CFD is solved over each of the voxels by the CPU at a rate of 100 times per second with three global passes per iteration. The load is spread over 5 different threads for minimal cpu impact.

https://docs.flightsimulator.com/flighting/html/Content_Configuration/SimObjects/Aircraft_SimO/flight_model/aerodynamics.htm#CFD_VoxelSizeScale
Set the scale of the voxel volume for CFD simulation. At 1, this will create a volume that is 150% that of the aircraft wingspan, and the volume will be comprised of n³ voxels (where n is set by the CFD_VoxelNbVoxels parameter).
Default value is 1.0, and the value will only be used when the CFD_EnableSimulation parameter is set to 1 (TRUE).

https://docs.flightsimulator.com/flighting/html/Content_Configuration/SimObjects/Aircraft_SimO/flight_model/aerodynamics.htm#CFD_VoxelNbVoxels
This can be used to set the number of voxels that will be cubed to make the sample volume for the CFD simulation.
IMPORTANT! This may have a serious impact on performance if set to values greater than the default value, due to it currently having a time complexity of O(n3).
Default value is 20.0, and the value will only be used when the CFD_EnableSimulation parameter is set to 1 (TRUE).

 

Edited September 2, 20223 yr by lwt1971

1 minute ago, Bobsk8 said:

And the percentage of MSFS users  that fly gliders is what, maybe 1% at most. 

Quite obviously this more advanced atmospheric airflow and flight dynamics improvements is not *just* for gliders, as it impacts all aircrafts.

9 minutes ago, Stoopy said:

Whats a CFD?

https://docs.flightsimulator.com/flighting/html/Developer_Mode/Aircraft_Editor/Debug/Debug_Aircraft_CFD.htm