If I set the landing airport, when I take off I will get very low FPS (low as 10fps)

Please tag your post with #pc and/or #xbox.

Are you on Xbox, Steam or Microsoft Store version?
Microsoft Store

Are you using Developer Mode or made changes in it?

Brief description of the issue:

My computer parameters: i7-12700f + RTX3070, 32GB-DDR4 3200 RAM,2T SSD,2560x1440 165Hz display.

When I set the departure and destination airports, I will get very low framerate after takeoff.

If I only set the departure airport and not the destination airport, then everything works fine for my FPS.

If a bigger plane is used then the FPS will be lower.

If no destination airport is set:

Of course, if I stay on the ground, the frame rate is normal:

Detailed steps to reproduce the issue encountered:

  1. Arbitrarily set the departure airport and landing airport to start a flight

  2. Good FPS when on the ground:

  3. Take off, leave the airport, the frame rate will drop instantly:

  4. Restart a flight, only set the departure airport, do not set the target airport, take off, the frame rate will behave normally:

PC specs and/or peripheral set up if relevant:
Default Ultra Graphics Settings.

Build Version # when you first started experiencing this issue:


That’s usually the problem.


Please read in full, when I don’t set the landing airport, I get normal FPS.

If you’re flying the same route twice then the cache data could be improving your performance the second time.

Added: Dropped frames are persistent, I will get 10fps forever.

My hardware usage is usually low when persistent dropped frames occur:

No, I’ve changed planes dozens of times to do this test, and it’s only when the landing airport is set that I consistently get very, very low frame rates.

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Thanks, i will try it

That’s no fun if the cache makes your performance worse.

It doesn’t work.

Enable developer mode and the fps graph. Make new screenshots. In the meantime I will see what happens on my PC between those two airports.


I followed those steps using same airports, same runways, same plane, with no issue. I have graphics on mostly ultra except photogrammetry and live traffic is disabled.

Manipulators may include such items as:

  • systems
  • planes
  • ai traffic
  • live traffic
  • stuff on ground, world
  • weather
  • simulation
  • (not rendering)
  • animations
  • cockpits

I reset all settings except the control options and the problem persists.

I don’t know what happened.

Do you have any addons? This is a standard question that appears in the template for reporting bugs.

Sorry I forgot to mention it, I have removed all addons (A plane) when I found this problem.

As you can see,the problem remains.

Tested the minimum picture quality, I got amazing FPS before takeoff, only 30 after takeoff.

When no landing airport is set, I get fantastic FPS.

So, what exactly is broken?

I have submitted an issue to zendesk with ID: 151341.

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I’m using the Simplified Chinese version of Windows, and when I turn on “Beta: Use Unicode UTF-8 in worldwide languages”, everything goes back to normal.



See also: c# - What does "Beta: Use Unicode UTF-8 for worldwide language support" actually do? - Stack Overflow

Test screenshot:

I don’t know why, but it solves the problem.

another user which reported same:

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