Jerky Aileron Roll on Short Final Jinx

Hello,

 

First off, I respectfully request that no one directs me to solve my problem by "upgrading" to FSX. I like FS9 and want to stay with it. Thank you.

 

I have been experiencing an anomaly in my use of FS9 and no search I have done has provided any clues. I am hoping I may find a resolve with your help. Here goes a typical scenario which has no rhyme nor reason except it happens...

 

I am on final using ILS and once I am on short final just before the arrival end of the runway the aircraft will initiate a jerk-bank (aileron roll) to the left or right, but mostly left.

Each "jerk" is roughly 10-20 degrees which causes the aircraft to crash.

The frequency seems to be about one occurrence

It also happens on takeoff, but it is rare.

Nothing I have tried so far has shed any light.

 

This has been happening for years on every computer on which I have installed FS9 and on numerous installs on each computer. Oddly, this only happens on my installs. The other members of my family (we all sim-fly, including my wife) have never had this issue. I have attempted to Isolate the differences between my computers without success. If I was superstitious I would be concerned about being jinxed, hence my playful allusion in my subject line. :)

 

Going forward and barring any silver bullets to remedy this conundrum...

 

To continue flying as many different flights with as many different aircraft to as many different aerodromes as I can and keep meticulous records. establishing some data that can be duplicated, hopefully.

Delete my existing FS9 installation and addons.

Clean out the registry, files, folders, etc.

Perform a clean, default install and test fly against the scenarios recorded in #1 above. I am hoping this will prove to be free of the anomaly but if it does happen I can be pretty sure my addons are safe.

If the default install proves not to have the bug, I will add one single addon at a time and test against the scenarios until I discover the culprit.

 

If you have read to this point I wish to express my gratitude for your interest and any help you can provide.

 

Standing by...

 

Calvin

 

ATTENTION: It has been suggested my issue is not really a problem, but the "WAKE TURBULENCE" setting in ACTIVE SKY has been set too high (thanks Buck). I will report back if this proves to be the case.

Hmmm.......Never happens in FSX!!! (Don't hit me!):eek: So, you are getting jerked around on both takeoff and landing. Is your A/P off during takeoff and does your landing jerk-aileron roll happen after shutting down the A/P just before touchdown (sorry for the football reference)! Does it happen in all kinds of weather? So far, all aircraft that you've tried, do it??

Hi Calvin, in addition to MrZippy's barrage of questions :)

Could it be your controller 'glitching' or 'chattering' on the aileron axis? If you have the full version of FSUIPC you can calibrate your controller and eliminate control spikes there, in addition to any other calibration software.

If everything is fine during the flight and this happens when landing I would agree with the Zippster. Sounds like autopilot or something is on and the plane is trying to correct it's course. Make sure you have the course selector on the right ILS heading if autopilot is on.

Turn off wake turbulence. I believe that is the issue here.

@mrzippy - You're safe (no hitting allowed) I have "always" had FSX. :) I don't recall jerk-banking happening in FSX which is weird because I have used ASE in FSX the same as FS9. I normally fly final on ILS (if available) and disengage at DH. So, I always(?) hand-fly my landings. Yes, it has happened in any weather and any aircraft AFAICT.

 

@tiger1962 - I thought my Logitech Extreme 3D PRO hardware might be the problem. I switched out with another one we have in the house, but no joy. Same problem persisted. Hmmm... could it be some quirk in the Logitech? Nope. I recently purchased a Thrustmaster T.16000M stick (highly recommended w/ mods as seen on Youtube) and it made no difference. I do have registered FSUIPC and use it, but it made no difference.

 

@MrUnsavory - Thanks for the suggestion, but I eliminated those possibilities.

 

@bam1220 - Buck293 on the "other" flightsim forum was the one who suggested wake turbulence as the culprit. The setting was at 50%. I lowered it to 10% and have had no jerk-banks so far.

 

Thanks for all the commentary. I will report back after some time to really check it out.

 

Calvin

@mrzippy - You're safe (no hitting allowed) I have "always" had FSX. :) I don't recall jerk-banking happening in FSX which is weird because I have used ASE in FSX the same as FS9.

 

It would have been nice to know what addons you have in your Sim in your first post! Could have provided more helpful answers.