RE: Europa-List: XS taxiing turn to the left

[Bud Yerly <budyerly@msn.com>]

Arwel,

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


  1.  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 di
rection.
  2.  Pilot only in the port side is a left turn.  Increase left tire press
ure to compensate.    The heavy pilot on the port side bends the gear a bit
 and throws the track out pulling to the left.  It=92s natural but if all i
s operational, simply read on.
  3.  Friction plate not even or worn.  On install or maintenance use a sca
le 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 degr
ess 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.
  4.  Nose gear fork spindle is offset or leaning.   Tends to hang up the n
ice smooth centering of the nose tire.
  5.  Main gear leg bent or slightly off track.  The main gear may throw on
e wheel toe out.  You can on next annual jack the plane off its gear and ch
eck the spindle for toe in/out as well as the relative position of each gea
r to each other.  This is very difficult to adjust in the Europa.  If the g
ear leg is loose, see my article rough draft attached on correcting the loo
se main gear bolt hole.
  6.  Draggy brake, or improperly torqued bearing.  See my Matco bearing ar
ticle 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 torq
ued.  If your brakes are rattling due to poor sliding pin and or caliper su
pport 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, Gr
umman AA series and other castering nose wheel aircraft.  Just without the 
fiberglass.

Best Regards,

Bud Yerly
Custom Flight Creations, Inc.

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Window
s 10

From: arwel pritchard<mailto:arwel.pritchard@powercom.ltd.uk>
Sent: Wednesday, November 4, 2020 4:05 PM
Subject: Europa-List: XS taxiing turn to the left

m.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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