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XS taxiing turn to the left

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arwel.pritchard(at)powerc
Guest

Posted: Wed Nov 04, 2020 12:58 pm Post subject: XS taxiing turn to the left

Good evening



Can anybody shed some light on why my XS Tri-gear pulls to the left 

whilst taxiing?



I have jacked the undercarrige up on each side today to see if the 

brakes were binding, they seem to be free and both wheels seem to have 

the same amount of friction when turned by hand.



Thanks

Arwel

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wdaniell.longport(at)gmai
Guest

Posted: Wed Nov 04, 2020 1:32 pm Post subject: XS taxiing turn to the left

front wheel pivot too tight?

Will

William Daniell



LONGPORT



+1 786 878 0246

On Wed, Nov 4, 2020 at 4:02 PM arwel pritchard <arwel.pritchard(at)powercom.ltd.uk (arwel.pritchard(at)powercom.ltd.uk)> wrote:



 	  Quote: 	
		  --> Europa-List message posted by: arwel pritchard <arwel.pritchard(at)powercom.ltd.uk (arwel.pritchard(at)powercom.ltd.uk)>

 

 Good evening

 

 Can anybody shed some light on why my XS Tri-gear pulls to the left 

 whilst taxiing?

 

 I have jacked the undercarrige up on each side today to see if the 

 brakes were binding, they seem to be free and both wheels seem to have 

 the same amount of friction when turned by hand.

 

 Thanks

 

 

 Arwel

 

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danny shepherd

Joined: 27 Jan 2006
Posts: 117
Location: north Wales, United Kingdom

Posted: Wed Nov 04, 2020 2:03 pm Post subject: XS taxiing turn to the left

at the momemt arwel.i'd be happy if it went iether way. still groundedÂ  

a little pxxst olf with not being able to fly, danny:-(.



On 04/11/2020 20:58, arwel pritchard wrote:

 	  Quote: 	
		   

 <arwel.pritchard(at)powercom.ltd.uk>



 Good evening



 Can anybody shed some light on why my XS Tri-gear pulls to the left 

 whilst taxiing?



 I have jacked the undercarrige up on each side today to see if the 

 brakes were binding, they seem to be free and both wheels seem to have 

 the same amount of friction when turned by hand.



 Thanks

 Arwel

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budyerly@msn.com

Joined: 05 Oct 2019
Posts: 286
Location: Florida USA

Posted: Wed Nov 04, 2020 5:50 pm Post subject: XS taxiing turn to the left

Arwel, 

  

There are a number of reasons for slight tracking issues on hard pavement. 

   Air pressure in the tires is different.  Low tires drag but if all is even, if weight on the one tire is heavier the aircraft will curve that direction.  
Pilot only in the port side is a left turn.  Increase left tire pressure to compensate.    The heavy pilot on the port side bends the gear a bit and throws the track out pulling to  the left.  It’s natural but if all is operational, simply read on.
Friction plate not even or worn.  On install or maintenance use a scale to check if the nose gear fork moves from center, left and right equally.  Check the breakout force for when  the gear moves.  Move the gear 10 degress right.  Simply pull the scale in the direction to re-center.  The do it from the left.  You may find your nose gear sticks slightly off center and prefers to be off center.  Some use a sticky grease to reduce the breakout  force.
Nose gear fork spindle is offset or leaning.   Tends to hang up the nice smooth centering of the nose tire.  
Main gear leg bent or slightly off track.  The main gear may throw one wheel toe out.  You can on next annual jack the plane off its gear and check the spindle for toe in/out as well  as the relative position of each gear to each other.  This is very difficult to adjust in the Europa.  If the gear leg is loose, see my article rough draft attached on correcting the loose main gear bolt hole.
Draggy brake, or improperly torqued bearing.  See my Matco bearing article Properly torqueing your wheel bearings on the Custom Flight Creations website...  A bearing that is too loose  is as bad as one that is over torqued.  If your brakes are rattling due to poor sliding pin and or caliper support bushings the brake can bind for a second.  If slight finger pressure stops the rattle and the plane tracks it is your problem. 

  

These are solutions that also apply to older RV trigear series aircraft, Grumman AA series and other castering nose wheel aircraft.  Just without the fiberglass. 

  

Best Regards, 

  

Bud Yerly 

Custom Flight Creations, Inc. 

  

Sent from  Mail for Windows 10 

   

From: arwel pritchard (arwel.pritchard(at)powercom.ltd.uk)

 Sent: Wednesday, November 4, 2020 4:05 PM

 To: europa-list(at)matronics.com (europa-list(at)matronics.com)

 Subject: XS taxiing turn to the left 

 

  

--> Europa-List message posted by: arwel pritchard <arwel.pritchard(at)powercom.ltd.uk>

 

 Good evening

 

 Can anybody shed some light on why my XS Tri-gear pulls to the left 

 whilst taxiing?

 

 I have jacked the undercarrige up on each side today to see if the 

 brakes were binding, they seem to be free and both wheels seem to have 

 the same amount of friction when turned by hand.

 

 Thanks

 

 

 Arwel

 

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