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Re: Europa-List: tailwheel arm fitting

Subject: Re: Europa-List: tailwheel arm fitting
From: Bud Yerly <budyerly@msn.com>
Date: Sat, 24 Aug 2013 14:57:39
Rowland,
It just doesn't fit without tweaking.
You will find that it may be necessary to file a small round in the skin 
to clear the tail spring.  Also the 7/8 inch hole is probably drilled 
perfectly square yet the spring does not go through the tailpost 
perfectly square and it is shown in the diagram in the manual page 23M-8 
that it is angled through the tail post and impacts the lower skin.  So 
some adjustments are normal.  Remember a small amount of space is 
necessary for the Redux when it is all done and ready to go final.

You will also see that the XTW15 flat piece of metal for the 5/16 bolt 
doesn't quite line up right, and some adjustments there are not uncommon 
also.

Not speaking for the factory any longer, I can say what I do, and in the 
case of the tail spring, I find the ply support pylon in the tail is 
usually not tough enough for a couple ground loops, so I tend to build 
the pylon all the way across the fuselage bottom as shown in Fig 11 
Chapter 23M but make it just a bit wider.  I do this so when the client 
drills the hole for the AN5-12 bolt and finds he can't quite get the 
alignment perfect, I come back in and install a 3/8 steel tube in the 
bottom as a sleeve with Redux.  What the sleeve is good for is it helps 
when the bolt is pulled up.  The sleeve prevents the bolt from crushing 
the fuselage skin, and ply support when the bolt is properly tensioned, 
it also gives more support for the bolt, retards bending of the bolt and 
it will be less likely to be difficult to pull out the bolt, if the 
spring is bent in a mishap... 


Happy building,
Bud
  ----- Original Message ----- 
  From: Rowland Carson<mailto:rowlandcarson@gmail.com> 
  To: Europa e-mail list list<mailto:europa-list@matronics.com> 
  Sent: Friday, August 23, 2013 5:07 PM
  Subject: Europa-List: tailwheel arm fitting


<rowlandcarson@gmail.com<mailto:rowlandcarson@gmail.com>>

  I've drilled the 7/8" hole in F10 for the tailwheel arm. I used 
outside calipers to get the centre the correct 1" above the fuselage 
bottom skin (that is, the OUTSIDE of the fuselage) and took care to keep 
the bore of the hole parallel to the fuselage bottom. The bottom of the 
hole finished up just clear of the curved bottom flange of F10.

  The tailwheel arm XTW06 fits into the hole, but will not go far enough 
forward for the hole at forward extremity of XTW06 to align with the 
marked centre 160mm forward of the front face of F10, because XTW06 
binds against the bottom of F10 & of the fuselage.

  Do I need to

  (a) enlarge the hole in F10 upwards?

  (b) relieve F10 & fuselage at the bottom centre to clear XTW06?

  Opinions, please!

  in friendship

  Rowland

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