4x Time Compression will stall the aircraft

[DoubleP99]

When I enable auto time compression up to 4x it goes to that speed, but wings start rocking uncontrollably left and right to 30 ° of bank each side, until the aircraft loose all of its speed, stall and crash.

At 2x it works without issues.

I'm using MSFS2024 version in the latest SU1 Beta.

Very disappointing for a long haul aircraft, sim rate is a very important feature, I hope you will be able to fix this very soon.

I'm happy to give you more feedback on the topic if needed, thanks.

[richboy2307]

Hi @DoubleP99

We have tested Time Compression extensively, with users having even completed a full flight including autoland with time compression without issues. Ofcourse we can't test every scenario as each PC is different when it comes to accelerated simrate.

It comes down to the individual hardware's ability to handle all the calculations and system computations on the chosen multiplier. Ensure all assists are disabled and please provide videos along with full route,specs and FPS if you continue to have the issue.

Thanks!

[msujim8]

@richboy2307 is it possible for the user to actually control the time compression? The only options that I've seen is Auto or OFF (for both 2x and 4x)... I just did my first flight and the time compression never went above 2x even though I had it set to "up to 4x". I just want to make sure that I'm not missing something- thank you! 

[richboy2307]

Hi  @msujim8

It will go up to 4X as suggested, meaning if the aircraft senses based on sim telemetry data that your pc will be able to handle 4X, it will scale up accordingly. If not it will sustain max possible.

This is by design and unlikely to change for stability reasons.

Thanks!

[DoubleP99]

1 hour ago, richboy2307 said:

Hi @DoubleP99

We have tested Time Compression extensively, with users having even completed a full flight including autoland with time compression without issues. Ofcourse we can't test every scenario as each PC is different when it comes to accelerated simrate.

It comes down to the individual hardware's ability to handle all the calculations and system computations on the chosen multiplier. Ensure all assists are disabled and please provide videos along with full route,specs and FPS if you continue to have the issue.

Thanks!

I will do it, thanks!

[alexkoenigs]

For me the same. When go to X4. Otherwise the Aircraft runs perfect. Great Job!  Hope you can fix it, especially for long flights. 

[richboy2307]

I have just tried a flight on 4X again and am not able to reproduce any issue (A350-900, Cathay, VHHH-RJTT, FS24, Accel Up To 4X).

Please ensure the following:

• Ensure on SU1 Beta
• Ensure all assist are Disabled
• Use "Low" turbulence settings via Assistance Options (helps mitigate random AP disconnects due to excessive turbulence)
• Check control bindings and ensure no conflicting binds for trim or control inputs.

 

 

In case you continue to have issues, please provide

• Route OFP (Attach PDF)
• Sim Used (FS 20 or 24)
• OIS Navdata Setting (SIM DEFAULT or NAVIGRAPH)
• Variant (A350-900 or 1000) 
• System Specs (CPU, GPU, RAM)
• Sim Rate used (2x, 4x)
• Any other 3rd Party utilities running with sim (FSRealistic/FSUIPC etc.)
• Screenshots / Video recording of the crash

We need the above data to try to reproduce the conditions in which you have had problems such that we can try to identify any issues.

Thanks!

[DoubleP99]

12 hours ago, richboy2307 said:

I have just tried a flight on 4X again and am not able to reproduce any issue (A350-900, Cathay, VHHH-RJTT, FS24, Accel Up To 4X).

Please ensure the following:

• Ensure on SU1 Beta
• Ensure all assist are Disabled
• Use "Low" turbulence settings via Assistance Options (helps mitigate random AP disconnects due to excessive turbulence)
• Check control bindings and ensure no conflicting binds for trim or control inputs.

 

 

In case you continue to have issues, please provide

• Route OFP (Attach PDF)
• Sim Used (FS 20 or 24)
• OIS Navdata Setting (SIM DEFAULT or NAVIGRAPH)
• Variant (A350-900 or 1000) 
• System Specs (CPU, GPU, RAM)
• Sim Rate used (2x, 4x)
• Any other 3rd Party utilities running with sim (FSRealistic/FSUIPC etc.)
• Screenshots / Video recording of the crash

We need the above data to try to reproduce the conditions in which you have had problems such that we can try to identify any issues.

Thanks!

Hello @richboy2307,

I was able to take a video of the issue.

• I'm using MSFS2024 SU 1 beta
• All of my assist are disabled exactly like the screenshot in the FAQ article link above
• Turbolence setting set to "Low"
• I have no conflicting binds for trim or controls
• OFP PDF is attached to this post
• Using Navigraph Navdata 
• Variant A350-1000 (no cabin) (in the issue mentioned at the top of the post, not  in the video I was using the A350-900 with cabin and the issue was exactly as shown on video)
• CPU AMD Ryzen 7 3800X, GPU NVIDIA GeForce RTX3080, RAM 32GB 3200mHz, everything (game, community, wasm, game cache) is on SSD. FPS can be seen on top right of the screen in the video.
• Sim rate used 4x (with 2 everything works fine)
• Only using FSUIPC and A Pilot's Life 2 (which only read data from the simulator), but I had the problem this exact way also without using it and any other addon.
• Video here: https://youtu.be/gWReTGBhMG0

As you can see in the video, also the AFK mode feature is not working. 

You can see in the video the autopilot disconnect, but everything remain at 4x speed until I manually pause the simulator.

Hopefully this can help you.

Let me know if you need any more detail, thank you!

OTHHEGCC_PDF_1740651405.pdf

[msujim8]

@richboy2307 thanks for the explanation- appreciate it!

I do think users should absolutely have the ability to control the sim rate (at their own risk) via the keyboard or through popular add ons like Sim Rate Selector. Implementing via the app seems like a good idea, but then if you're using the Auto sim rate then you pretty much always have to keep that page up on the EFB so you can shut it off when needed. Using the keyboard or Sim Rate Adjuster allows extremely simple and fast selection of the sim rate without occupying valuable screen space within the aircraft. 

Right now when time compression within the EFB is set to OFF, users can't control sim rate via the keyboard or Sim Rate Selector. I think this is a crucial thing for any long haul airliner- again, with it being clear that doing so is 100% at the users own risk to use. 

 

Thanks!

[ttutko]

Ran into a similar issue but didn't see what lead up to it. However, I wanted to add that in my case, I had AFK mode turned on so it should have paused when A/P disconnected but it did not. I eventually walked close enough to the room the computer was in to hear the A/P disconnect alarm going off but no matter what I tried, the aircraft was unrecoverable.

[Yetty]

On 2/27/2025 at 12:49 AM, richboy2307 said:

I have just tried a flight on 4X again and am not able to reproduce any issue (A350-900, Cathay, VHHH-RJTT, FS24, Accel Up To 4X).

Please ensure the following:

• Ensure on SU1 Beta
• Ensure all assist are Disabled
• Use "Low" turbulence settings via Assistance Options (helps mitigate random AP disconnects due to excessive turbulence)
• Check control bindings and ensure no conflicting binds for trim or control inputs.

 

 

In case you continue to have issues, please provide

• Route OFP (Attach PDF)
• Sim Used (FS 20 or 24)
• OIS Navdata Setting (SIM DEFAULT or NAVIGRAPH)
• Variant (A350-900 or 1000) 
• System Specs (CPU, GPU, RAM)
• Sim Rate used (2x, 4x)
• Any other 3rd Party utilities running with sim (FSRealistic/FSUIPC etc.)
• Screenshots / Video recording of the crash

We need the above data to try to reproduce the conditions in which you have had problems such that we can try to identify any issues.

Thanks!

Hello Rich,

Please see my thread here where I have done some really easy to replicate steps for this issue:

 

The bug only occurs in the eastern hemisphere of the globe.

[richboy2307]

21 hours ago, DoubleP99 said:

Hopefully this can help you.

Let me know if you need any more detail, thank you!

This is helpful thanks. Looking into it.

12 hours ago, ttutko said:

Ran into a similar issue but didn't see what lead up to it. However, I wanted to add that in my case, I had AFK mode turned on so it should have paused when A/P disconnected but it did not.

Can you please also provide the requested info so we can try to reproduce.

3 minutes ago, Yetty said:

Please see my thread here where I have done some really easy to replicate steps for this issue:

Hmm that is weird because the flight I did (VHHH-RJTT) definitely falls within that area of influence and I was able to achieve 4x. But this is helpful we're investigating.

Thanks!

[Yetty]

11 minutes ago, richboy2307 said:

This is helpful thanks. Looking into it.

Can you please also provide the requested info so we can try to reproduce.

Hmm that is weird because the flight I did (VHHH-RJTT) definitely falls within that area of influence and I was able to achieve 4x. But this is helpful we're investigating.

Thanks!

If you need me to gather any further information I can, I can easily replicate this issue everytime, its really weird I agree!

[bigh55]

On 2/27/2025 at 1:49 AM, richboy2307 said:

I have just tried a flight on 4X again and am not able to reproduce any issue (A350-900, Cathay, VHHH-RJTT, FS24, Accel Up To 4X).

Please ensure the following:

• Ensure on SU1 Beta
• Ensure all assist are Disabled
• Use "Low" turbulence settings via Assistance Options (helps mitigate random AP disconnects due to excessive turbulence)
• Check control bindings and ensure no conflicting binds for trim or control inputs.

 

 

In case you continue to have issues, please provide

• Route OFP (Attach PDF)
• Sim Used (FS 20 or 24)
• OIS Navdata Setting (SIM DEFAULT or NAVIGRAPH)
• Variant (A350-900 or 1000) 
• System Specs (CPU, GPU, RAM)
• Sim Rate used (2x, 4x)
• Any other 3rd Party utilities running with sim (FSRealistic/FSUIPC etc.)
• Screenshots / Video recording of the crash

We need the above data to try to reproduce the conditions in which you have had problems such that we can try to identify any issues.

Thanks!

In your testing did you use fsrealistic ? If not than that’s likely the issue since it also add to the turbulence 

[vpilot737]

Hi,

For what its worth, I have the same issue described by the OP but I'm on FS20

Works fine on x2 but on x4 wings starts uncontrollably left and right to 30 ° of bank each side as op said.

 

It does not matter what flight, it does the same on each flight i'm using 4x. 

Im not using fsrealistic, I do use fsuipc. 

 

I've also seen someone mentioning this in one of the youtuber A330 Driver videos as well 

 

PS: I don't have this issue on 787 nor 777 (both using 4x to perform LH)

 

Please address this 

[pizzamonster]

Simmilar issue but: I had one fly today from london to New York - not any issue with sim x4. Secound route: Copenhagen to Tokyo, arround N80 not possible sim rate x4, stuck at x2 till I cross N90 on another side of the Globe.: sim rate automatyclly go up to x4. I have installed new updated for plane.

Edited March 1 by pizzamonster

[bigh55]

8 hours ago, vpilot737 said:

Hi,

For what its worth, I have the same issue described by the OP but I'm on FS20

Works fine on x2 but on x4 wings starts uncontrollably left and right to 30 ° of bank each side as op said.

 

It does not matter what flight, it does the same on each flight i'm using 4x. 

Im not using fsrealistic, I do use fsuipc. 

 

I've also seen someone mentioning this in one of the youtuber A330 Driver videos as well 

 

PS: I don't have this issue on 787 nor 777 (both using 4x to perform LH)

 

Please address this 

I tested it and for me it disappeared when I deactivated all fsrealistic movements (they are a pest honestly) AND stopped using the inibuild liveries.

They are prohibiting you from changing certain aspects of the aircraft.

ah and I also chose a deadzone of 0.1 for my sidestick

however there still is something off with the AP at times it just starts bobbing (at least not rolling and crashing)

 

Edited March 2 by bigh55