Hi and welcome as is my first post here.
First of all I have to say I'm affected with massive frame drop after 30-60 minutes of flying. This is always going from 35fps at the beginning to 1-2fps after 30-60 minutes of flying.
I'm also aware, that lot of ppl have the same issue. This is not part of my question, however I'm taking in consideration, that can be related.
So each time after stabilizing aircraft I'm engaging A/P then reaching cruising altitude and everything is going well, until out of nowhere, speed is falling from 300ias to IAS~250, then two annunciators (right by the left side of airspeed) are blinking in RED screaming
STALL VLV [A|B]] OPEN. Of course, A/P disengaging immediately, plane is getting 'crazy'
- Engines all 4 FULL power (tested with TMS modes and with TMS off)
Any ideas guys, what can cause stall at this speed and why full thrust engines are not keeping speed?
Maybe any workarounds for frame drops?
Are you using Rex Weather Force?
Nope, no weather modification applications
I wonder watching ppl on Twitch, how they can fly for a long time, w/o any frame drop? Do you ppl have this issue here as well?
@magdalina For the frame drops try turning off the EFB for a few minutes. Not sure if it's a MSFS or A/C problem but it has helped me.The EFB map seemed to be especially bad here if running whilst flying.
Regarding the stall, I have had this issue. Check your trim. Every now and then it seems to go crazy and the auto pilot adjusts it way back forcing the nose to pitch too high. I still haven't worked out if it's a bug or pilot error!
RetiredMan93231 last edited by
@retiredman93231 Page 59 of manual "Engine fire and overheat warning " no overheat conditions detected, MWS was clean.
@wyzbowski unfortunately ideas with EFB did not help.
I did tests on other aircrafts, but non of those I owned, is going to 1-2 fps. Yes, they are stuttering, but recovering to 20-25fps. BAe never recovered from 1-2 fps. ( even though I'm going offline with all settings LOW, no rolling cache, paging in windows or w/o it) W/o Alt+Tab (window switching) or with all the time acting the same.
The only workaround for now, is to fly distances lower than 200nm (this is safe).
With the stall thing, once this happened, I have had impression, that weather (as I have mentioned i did not own any weather update applications) was changed/ updated in game?
Trim is good idea, but for me happened when on cruising alt in a flat flight. Well, still to be monitored.
@magdalina What kind of system do you have, and what apps are running in the background?
CPU: x3950 (OC 4,2 GHz native 3,6 GHz -> checked w/o OC, no success)
RAM: 128 GB
GPU: Gigabyte 3080 Ti 12 GB
Net: Fiber 300Gbit download / 30 Gib upload
Because I've used Xplane, FSX, 2004 (I'm from previous century)
I'm most likely closing all unused apps before starting sim. Is like zx spectrum and loading game from tape ... do not touch, do not look and so on
When sim is started (even though rig is powerful) is started with almost nothing in background but win services.
@magdalina should not be the system for a lack of power.
I found this yesterday, perhaps it is related and helps.
@cgnoorloos Thank you for the link, I've tested this as well, and again with no success, 0 improvement.
@magdalina Ah shame. Then i am not entirely sure. I assume all drivers are up to date?
Have you tried it with photogametry off?
@magdalina sorry to hear you are still having stuttering problems. I am assuming you have the latest version of the aircraft. Just Flight did an update over the weekend but as Monday was a holiday in the UK many people, including myself, didn’t get an e-mail saying there was an update till Tuesday. I have read elsewhere that the latest version improved frame-rate performance for some people.
As for the trim issue, my aircraft was in level flight stable in the cruise as well. On both occasions I left the room to make a coffee and came back to find the auto pilot had disconnected and the plane in a slow downward spiral. It was whilst fighting to regain level flight I happened to notice the trim indicator was nearly all the way back.
My only suggestion is to uninstall the aircraft and reinstall the latest version if you haven’t done so already. If you still have problems put in a support ticket to Just Flight. I know they hang out here on the forums occasionally but a support ticket will guarantee someone from there team will be aware of your problems. Hope you get it sorted, good luck!
@cgnoorloos Hi, yes all drivers are up to date, planes and sim it self.
I;ve tested also offline, w/o photogramtery, and everything LOW, still bugish.
@wyzbowski Yep acft is latest version.
Yesterday I have experienced stall again.
disabled second network card
disabled all unused services in Windows
closed all applications
[MSFS2020] weak network connection IGNORE | TURN OFF OHOTOGRAMTERY(really?) ->IGNORE
Engines set thrust sync M1 90%
speed fall from 290 IAS to 210 IAS
auto A/P disengage
STALL VLV[A|B] OPEN, yoke shaking.
while ( total alt loss > 6000 ft ) :
manually try to stabilize the plane.
set full thrust -> no speed gain at all (acting like no power, but all gauges shows proper params, no overheat anywhere)
dive ~1000 ft to gain speed
speed 250 IAS
stabilize, flat flight
try A/P -> disengage -> STALL VLV[A|B] OPEN -> yoke shaking
finally all quiet
frame drop to 20-25 fps
frame drop to 15-20 fps
frame drop to 7-1 fps
This is how mostly my flights looks like.
JustFlight is aware, I've created ticket, but they do not have any solution. This is the reason I'm asking here.
@magdalina it's good day finally I've made flight from EPWR to EGLC w/o any problems!
What helped to get rid of stuttering and frame drop, was to remove all add-ons from Community folders, AND file named Content.xml. For me C:\Users\YourUsername\AppData\Roaming\Microsoft Flight Simulator.
Removing everything ONLY from Community didn't help w/o removing this file.
Also, this time, I didn't experience stall problems at all.
Worked for me:
Point 3 from https://flightsimulator.zendesk.com/hc/en-us/articles/4408886545938-How-to-restore-the-sim-to-its-vanilla-state
Thanks everyone for help!
@magdalina Would you be kind enough to let us know how you go once you start re-installing addons?
@flightstrike Hi, I've reinstalled some add-ons and still no problem so far.
I have (just right now, when writing this answer) started sim with:
airport LXGB + resolution upscaling from x1600 to x2160 + all settings ULTRA + HDR + BAe146 and still stable 49fps!
Speaking about add-ons.
I have already added and tested:
- other planes,
- zWTnxi-0.12.1-sync-fix ( gtn fix vs wtt)
What I didn't install this time is:
- Lot of asset Libs for 3rd party free sceneries other than ORBX,
- 3rd party free sceneries other than ORBX,
- YourControls (I wasn't so brave to install it again, as someone (sorry I do not remember thread and nickname) on forum, mentioned that this can also cause problems with fps drop)
Now everything is working SUPER WELL and I'm really happy with my purchase.
Also, I did not experience stall issue again, so probably was caused by low frames (as I've suspected).
CPU: x3950 (OC 4,2 GHz)
RAM: 128 GB (3200 OC)
GPU: Gigabyte 3080 Ti 12 GB (no OC)
Net: Fiber 300Gbit download / 30 Gib upload
Paging file: no paging
@magdalina Thank you. Just worth mentioing for the recrord if this issue pops up again.