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Autobrakes not functioning?

Featured Replies

Hi,

 

I seem to be at a dead end trying to solve a problem with my NGX's autobrakes.  They don't work properly any more.  They do not apply the brakes on touchdown, but rather it seems to apply maximum (and I mean maximum, no matter what level I set on the knob) braking at some later point (all but one occasion being the very moment the autobrakes switch is turned back to off).  There are no failures on the aircraft that would explain it.  I currently have a nose gear imbalance, but I've been having this problem before the landing at MHTG that caused that imbalance warning, so I don't believe that explains it.  FS2Crew is not the cause, I've flown several test flights without it and still have the problem.

 

The toe brakes axis on my rudder pedals are not the cause, either.  I disabled them entirely and still get the problem.

 

Can someone please help?  Any ideas how to get my autobrakes to work properly?

 

Dave Coulter

StoneC0ld_zps439869f4.png

Declared weather:  FSX: ASN / FS9: ASE

 

  • Author

Problem solved. Apparently the calibration settings for the toe brakes in fsuipc was not cleared out and affects the autobrakes....

 

Dave

StoneC0ld_zps439869f4.png

Declared weather:  FSX: ASN / FS9: ASE

 

  • Author

Sorry to keep having to update this, but if I intend to have both working autobrakes and working toe brakes, I'm back to square one...

 

After doing some testing trying to re-enable the toe brakes on my rudder pedals (the GoFlight pedals), I simply cannot get the autobrakes to work with the toe brakes enabled, even with the null zones as big as I'm willing to make it (somewhere between 1/3 and 1/2) and several recalibrations.  I never had any problems with the toe brakes and autobrakes under Vista 64-bit, now I'm at a loss...

 

Any ideas?  Any further information required?

 

Dave

StoneC0ld_zps439869f4.png

Declared weather:  FSX: ASN / FS9: ASE

 

  • Commercial Member

Do you have any calibration in FSUIPC? If yes remove it.

 

On my setup, although I use CH, the only calibration I have made is through CH control manager.

 

On FSX I have Sensitivity about 3/4 full and Null Zone very little and never had problems

Chris Makris

PLEASE NOTE PMDG HAS DEPARTED AVSIM

You can find us at http://forum.pmdg.com

 

  • Author

I did remove the calibration settings in FSUIPC, as mentioned in one of the earlier posts.  However, after reading  your response, went back into FSUIPC to find the calibration settings had come back all by itself..  (I guess it didn't save the changes or something for some reason, without me realizing it...)

 

Removed them again (and it saved this time), and immediately found the root cause:  a constantly-flickering "differential brakes" message, which I narrowed down to the left toe brake pedal.  I guess I need to replace the potentiometer again (or replace the entire rudder pedal unit, which I've been considering for a while anyway).

 

In the meantime, I set a new calibration for the right toe brake pedal in FSUIPC and assigned both the right and left brake functions to the right pedal through FSUIPC (sacrificing the individual differential brakes on the pedals).  Brakes and autobrakes all work fine now. :)

 

Thanks :)

Dave

StoneC0ld_zps439869f4.png

Declared weather:  FSX: ASN / FS9: ASE

 

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