Wake turbulence causes massive loss of FPS

Tested in 2 different situations.

  • The first 747 followed by a TBM
  • The second was a 9-person formation flight with an aircraft owned by our team.

In both cases, FPS dropped after a few minutes, making the flight impossible.
In the 9 person formation flight, we all experienced this drop, and by deactivating the wake turbulence, the FPS returned to normal.

Restarting the flight or quitting and restarting are not enough.

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Did the wake turbulence itself work? or couldn’t you test it because of the loss in FPS?

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Can you confirm that you’re seeing multiplayer aircraft in 1.4.9.0 despite this “known” issue.

Yes, no problem on my end. Tested earlier, I could see the other person clearly.
I don’t know if this helps, but both have been on steam.

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So with our planes, not really, but the test was short-lived. But the 747 with the TBM did. The TBM was a real handful

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Thanks. Good to know.

Frustrating that the release notes always seem to contain a lot of inaccuracies as well as lack of specifics on changes.

All part of the fun I guess. A journey of discovery.

Depending how close you got to the 747, the TBM should roll inverted and likely not survive in real life. How well is it modeled? On one of the dev streams it looked like the aircraft started producing wake turbulence as soon as the take-off roll commenced. Wake turbulence production should start when nosewheel leaves the ground. When trailing a heavier aircraft should mostly cause roll.

My most recent encounter in real life was trailing behind a heavy, intercepting the glideslope from below with a slight crosswind, so most worse case. Separation was sufficient, however, we ended up with the aircraft banking 30 degrees left in little over a second and needed a lot of roll control to stop it. This is in my experience what usually happens, a bit bumpy but mostly a strong rolling motion.

Would also be interesting to see if you can catch your own wake. Doing steepturns with a Cessna or anything else small you will usually transit through your own wake at some point.

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We were relatively far away for takeoff, so there was no problem on the TBM.

In the flight phase, however, the stick was completely to the right and the plane went off on the left wing. We were pretty far apart, which seems logical to me.

I haven’t tried it to see if it’s affected by its own turbulence, but I’ll give it a try.

So is wake turbulence currently only working with multiplayer trtaffic and not live traffic, even though I see it in the visualization?

No idea I haven’t tried it with live traffic.
I have disabled live traffic for performance.
I’ll test it sometime

As I understand it from the dev stream it used to be only working on live traffic, but now it’s also working on multiplayer aircraft.

I’m not sold on their claims as I was never able to observe any wake turbulence even with the default AI traffic they claimed it worked fine with.

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Agreed! This is still a problem in the released SU 2 update. I just started doing group flights with my high end AMD 9950 X3D, 64 GB Ram , RTX 5090 and 4 TB SSD Maingear PC. I couldn’t figure out when I got near the group my FPS when from 60’s down to below 20 and as low as 4 to 7. I went into the settings and disabled Wake Turbulence Assistance to fix the problem. Using OPENXR Tool kit metrics, I noticed with Wake Turbulence assistance ON , my rdr GPU was less than 1 and app CPU around 10 but FPS was horrible below 20. Definitely appears to be a bug. I’ve not noticed any problems using MSFS 2020 during group flights. I also adjusted the VR traffic settings from Ultra to Low so not sure which had the most effect.

Thank you for the bug report.

We have created an internal ticket to see if our team already has this logged, and if not they will attempt to reproduce the issue and create a new bug report. This item is now marked as feedback-logged. If there is an existing bug report or one is created, we will move this thread to bug-logged.

SU2 1.4.20.0 Wake Turbulence enabled causes FPS drops to single digits and/or stutters during multiplayer flights. Performance appears to be restored when multiplayer aircraft have about 10nm separation (regardless of flight heading from each other). Performance is also restored when all aircraft are parked at the same airport.
settings #waketurbulence

Indeed. This happened yersterday on a vatsim flight. In the meantime i disable wake turbulence. Such a great feature, sure hope to get it fixed.

if the devs are having trouble reproducing, it seems more pronounced if the other multiplayer aircraft are helicopters