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dskviator

LNAV chasing at Cruise Wind>30kts

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I also checked winds when it happened and if there were any extensive shifts or gusts I would have definitely noticed them. Will install some video recording program and try to make a recording next time it occurs. It is very well possible that it has something to do with specific settings in ASE but then it would be nice to find out which one :)

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Thank you for reply Dr. Vaos. NGX certainly raised the bar for FSX and sim in general and casual armchair simmers like me have a rude awakening of having to plan our flights more carefully now, not that I am complaining LOL.gif FWIW, I have made a few changes since then and yesterday when flying the COA 739 from EWR-SXM I had crosswinds at 50kts but the acft held on to the magenta line, no swinging, no swaying. I checked ASE and Disable Winds Aloft was disabled (obviously). I had FSInn open but was not connected to VATSIM, which was the case in all other situations when the course changes were happening (did I forget to mention that...Doh.gif), but my FSInn weather is off and weather is/was controlled by ASE/FSUIPC and wind smoothing was definitely enabled, including changes to wind restricted to 1 deg per 2 seconds (or something of that sort). So, the changes: Backup and Delete my FSUIPC.ini and let it rebuild (not so easy as it destroyed all my other custom settings for other acft, now I either gotta rebuild or use different .ini files). The only option that is enabled in FSUIPC is supress turbulences, but even without that the acft was on track. The weather settings in the FSUIPC were recommended from another sim product (which flew way higher than the current airliners and faster if I may say so), so I will have to go back and see how it affects that product. But before the NGX, the PMDG 747X did not have any problems with the same settings and neither did any of the other magenta line following payware products. And I haven't had time to apply the latest mandatory hotfix yet, since I haven't had any other problem and this one seems resolved, I haven't ventured into it. If I find out anything more in specific, I will be sure to post an update here.


Charan Kumar
FSX/XPX vPilot
VATSIM ZOA and Oceanic Controller (Pacific)

Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it is the only thing that ever has - Margaret Mead

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I don't have ASE or FSInn installed. So my only conclusion so far is it isn't related to any of these addons. My next step is to download real weather without winds aloft data and see if that effects things.

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did some further investigation tonight....

  • FSUIPC disable all weather and all settings in between has no effect on the issue
  • Clear all weather (static) in FSX weather options results in the problem going away
  • Real world weather and static weather themes apart from those with absolutely no wind has no effect on the issue

After turning FSUIPC logging on and logging all params, I'm seeing a strange keypress for the NGX. This key press is not present for any ather PMDG addon(ive logged them all) This could be a clue or be totally irrelevant, not sure: [Continuation log requested by user]Running inside FSX on Windows 7 (using SimConnect Acc/SP2 Oct07)Module base=61000000Wind smoothing fix is fully installed 409097 System time = 17/08/2011 21:10:52, Simulator time = 21:07:38 (19:07Z) 409097 LogOptions changed, now F0000000 0000001F 410704 Ready Flags: Ready-To-Fly=Y, In Menu=N, In Dlg=N 410782 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 410782 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 410875 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 410875 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 410953 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 410953 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411031 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411031 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411109 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411109 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411187 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411187 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411281 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411281 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411359 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411359 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411452 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411452 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411530 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411530 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411608 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411608 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411686 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411686 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411764 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411764 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411842 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411842 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411920 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411920 *** EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS 411998 Weather Read request (Nr Station) to area 5: Lat=48.35, Lon=11.78, Alt=0.0, Req=1 411998 Weather Received (type 5 request, Nearest): "EDDM&A453 091547Z 13803KT&D222NG 23206KT&A461NG 24309KT&A1375NG 27615KT&A2290LG 28621KT&A3204LG 29031KT&A5033NG 29340KT&A6862LG 29153KT&A8691LG 29265KT&A9910LG 29466KT&A11434NG 100KM&B-1953&D2451 3CU020&CU001FMMN000N 6CU035&CU001FMMN000N 21/15 14/06&A461 12/01&A1375 06/-2&A2290 01/-14&A3204 -11/-24&A5033 -23/-31&A6862 -37/-50&A8691 -45/-55&A9910 -53/-62&A11434 Q1018 @@@ 30 14 232 6 | 60 12 243 9 | 90 6 276 15 | 120 1 286 21 | 180 -11 290 31 | 240 -23 293 40 | 300 -37 291 53 | 340 -45 292 65 | 390 -53 294 66 | " 411998 WX Received in 0 mSecs, WX request type 5, Lat=48.3537, Lon=11.7829, Alt=0.0m 411998 >Change: Pressure=1018.0 mb

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This issue has been around for a long time now. It happens because of the unrealistic way FSX depicts Turbulence (Poorly Coded in FSX). It is often referred to as S-Turning or Auto Pilot Nav Hunting. The following settings below were recommended by Hi-Fi Simulations (Activesky) to combat the S-Turning and Auto-Pilot hunting issue with PMDG Planes. It will also prevent the Severe Wind change issue that causes the PMDG plane to suddenly Over Speed and Crash due to Excessive Forces on the aircraft. Even if you do not have Activesky these settings are still recommended to Smooth the Wind issues in FSX. Edit your FSX.CFG file and remove the current line in there and replace it with the one below TurbulenceScale=0.500000 Edit your FSUIPC.CFG file and remove the 2 lines in there and replace them with the ones below. TurbulenceRate=0.5,2.5TurbulenceDivisor=40,40,80,80 Now Load up FSX and go into FSUIPC and Change the Values in the Winds and Clouds TABs to match the images below. I have also tried the values of 1 and 1 instead of 3 and 2. When you get some heavy winds it will let you bounce around a little more and feels more realistic scaled.php?server=825&filename=fsuipcwinds.gif&res=mediumscaled.php?server=801&filename=fsuipcclouds.gif&res=medium Go to FSX Display Settings, Weather Tab. Disregard the top part of this image. Those settings can be whatever you like. The part we are focusing on is the 2 Boxes at the bottom. The most IMPORTANT one is the Disable Turubulence and Thermal Effects on Aircraft. If this Box is NOT Checked your going to keep on experiencing the S-Turn Effect. Do note that if you change anything in here at a later point in time those boxes uncheck themselves. So it is a good idea to make sure they are checked before you takeoff. scaled.php?server=718&filename=fsxweather.gif&res=medium Finally if your using Activesky Evolution like I am. Use Direct Weather Control and Set your Dynamic Rate of Change to 0. (Your weather will still update and change) This setting is recommended by Hi-Fi and works well.

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This issue has been around for a long time now. It happens because of the unrealistic way FSX depicts Turbulence (Poorly Coded in FSX). It is often referred to as S-Turning or Auto Pilot Nav Hunting. The following settings below were recommended by Hi-Fi Simulations (Activesky) to combat the S-Turning and Auto-Pilot hunting issue with PMDG Planes. It will also prevent the Severe Wind change issue that causes the PMDG plane to suddenly Over Speed and Crash due to Excessive Forces on the aircraft. Even if you do not have Activesky these settings are still recommended to Smooth the Wind issues in FSX. Edit your FSX.CFG file and remove the current line in there and replace it with the one below TurbulenceScale=0.500000 Edit your FSUIPC.CFG file and remove the 2 lines in there and replace them with the ones below. TurbulenceRate=0.5,2.5TurbulenceDivisor=40,40,80,80 Now Load up FSX and go into FSUIPC and Change the Values in the Winds and Clouds TABs to match the images below. I have also tried the values of 1 and 1 instead of 3 and 2. When you get some heavy winds it will let you bounce around a little more and feels more realistic scaled.php?server=825&filename=fsuipcwinds.gif&res=mediumscaled.php?server=801&filename=fsuipcclouds.gif&res=medium Go to FSX Display Settings, Weather Tab. Disregard the top part of this image. Those settings can be whatever you like. The part we are focusing on is the 2 Boxes at the bottom. The most IMPORTANT one is the Disable Turubulence and Thermal Effects on Aircraft. If this Box is NOT Checked your going to keep on experiencing the S-Turn Effect. Do note that if you change anything in here at a later point in time those boxes uncheck themselves. So it is a good idea to make sure they are checked before you takeoff. scaled.php?server=718&filename=fsxweather.gif&res=medium Finally if your using Activesky Evolution like I am. Use Direct Weather Control and Set your Dynamic Rate of Change to 0. (Your weather will still update and change) This setting is recommended by Hi-Fi and works well.
Thanks for this useful post!!! Just have made all the steps. Will test tomorrow.

José Fco. Ibáñez /// i7 6700k (Delid) @ 4,6 Ghz /// Asrock Z170 OC Formula /// 16GB RAM G.Skill Ripjaws V 3200 /// GTX 1070 Founders Edition 8GB /// LG 27UD58 4K 27' // OCZ Vertex 4 SSD (X-Plane 10) & SAMSUNG 850 EVO SSD (P3D V3) /// Windows 10 Pro x64

 

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Uhm, I tried this configuration but if I select " Disable Turubulence and Thermal Effects on Aircraft" there is no more turbulence, the air is always calm, even with clouds and thunderstorm. I did several tests, both with ASE and without, I built cloud layers with heavy turbulence but experienced none. What did I do wrong?


James Goggi

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Fixed the S-turns problem with this guide!!! @Paul Deemer Can you create a dedicated topic with this guide? Will be good post to stay pinned!!!


José Fco. Ibáñez /// i7 6700k (Delid) @ 4,6 Ghz /// Asrock Z170 OC Formula /// 16GB RAM G.Skill Ripjaws V 3200 /// GTX 1070 Founders Edition 8GB /// LG 27UD58 4K 27' // OCZ Vertex 4 SSD (X-Plane 10) & SAMSUNG 850 EVO SSD (P3D V3) /// Windows 10 Pro x64

 

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Uhm, I tried this configuration but if I select " Disable Turubulence and Thermal Effects on Aircraft" there is no more turbulence, the air is always calm, even with clouds and thunderstorm. I did several tests, both with ASE and without, I built cloud layers with heavy turbulence but experienced none. What did I do wrong?
Just a guess. You're probably not experiencing turbulence because you've disabled it.

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There's a way to get this working without disabling turbulence... I'll post something about the settings I'm using (which I got from a user here)


Ryan Maziarz
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For fastest support, please submit a ticket at http://support.precisionmanuals.com

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There's a way to get this working without disabling turbulence... I'll post something about the settings I'm using (which I got from a user here).
It would be nice to have a little turbulence back if its realistic, and not like the hand of god shaking and pummeling your aircraft cause that is not how it is in the real world, except under maybe extreme circumstances. At times the MD-11 would seesaw back and forth like it was a Rocking Horse. I didn't always have to use the disable turbulence box with the MD-11 but the 747-400 was well known for the S-turn issue so there wasn't much of a choice there. As for the 737-800 I wouldn't know cause I always check that box out of habit so have not had the chance to observe the behavior yet with the NGX. When you make the post about a possible alternative Ryan, please link it in here as well.

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Thanks Ryan, waiting for your post, indeed disabling turbulence sounded strange to me, as to say "ok, you will not get s-turns but forget turbulence, even with big thunderstorms!"


James Goggi

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Made all the changes to FSX.cng, FSUIPC.ini and the UI changes and this appears to have worked. Flying with practically no turbulence however is a bit of a downer. Still haven't figured out why I'm seeing continuous EVENT: Cntrl= 66377 (0x00010349), Param= 0 (0x00000000) TOGGLE_RECOGNITION_LIGHTS in the logs however, don't see it on any other aircraft including PMDG ones.

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Yeah looking forward to Ryan's post on this too.


Dylan Charles

"The aircraft G-limits are only there in case there is another flight by that particular airplane. If subsequent flights do not appear likely, there are no G-limits."

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Well one thing you can do until Ryan's post comes out is uncheck the Turbulence Near Aircraft Box and see if the aircraft is still S-turning which it might not now since you tamed your winds a bit by using lower values in FSX.CFG and FSUIPC.CFG. Nothing is perfect and sometimes sacrafices have to be made for Microsofts sloppy coding. sad.png

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