Force Feedback Head Movement Stutter/Slow

[Kalthios]

 I use a Microsoft Sidewinder Force Feedback 2 that works great in other flight sims but in this one causes a problem with looking around. There is a force feedback effect driven by wind moving over the aircraft's control surfaces that is causing the pilot's head motion to stutter.

 

Here are the results of my testing:

 

I did some testing in flight:

While parked on the runway with engine off and no wind or turbulence there was no stuttering during head movements.

While parked on the runway with engine off with full wind and turbulence there was significant stuttering during head movements.

While taxiing below 50 KPH without wind or turbulence there is no stuttering during head movements.

While taking off stutter increases with speed from very slight to severe as speed goes from 50 KPH to 150 KPH.

Slow speed flight at 135 to 150 KPH has slightly less stutter.

Enabling Auto-Level(Auto-Pilot) while in flight eliminates the stutter.

Going very fast (over 700 IAS in a Yak-1b) removes the stuttering but when you slow down the stuttering returns.

Losing your control surfaces removes the stuttering at all airspeeds.

 

Testing in game settings:

Disabling Force Feedback stops the stuttering.

Shaking and Feedback Power have no effect on stuttering.

Pitch and Roll deadzones have no effect on stuttering, nor does sensitivity.

Unbinding pitch and roll has no effect on stuttering.

Smoothing reduces stuttering while increasing latency of head motion latency.

Increasing Joystick Noise Filtering decreases stuttering while increasing head motion latency.

 

Removed all USB devices except keyboard, mouse, and joystick, restarted system

Stuttering was still present.

 

Looked into gameevents.cfg and found that these are the events that are being effected by the bug:

event="BC_HEAD_YAW"

event="BC_HEAD_PITCH"
event="BC_HEAD_ROLL"
event="BC_HEAD_TRANS_X"
event="BC_HEAD_TRANS_Y"
event="BC_HEAD_TRANS_Z"
event="BC_HEAD_ZOOM"

 

Tried editing the files in the input folder:

No effect on stuttering. None of the ffp or config files seem to be read at runtime.