How to set up pull-pull cables

[rick wallace]

Good morning, John! 

Let's see... pull-pull. The method below was taught to me by a great pattern
flier and has worked for all my planes since. I'm sure someone else will
post a great method for doing this with plastic coated steel fishing leader,
but I've been using vinyl located braided Kevlar cord and never had a
problem. 

As always, the rudder control arms should terminate on the hinge line. The
connections on the ends of the arm should be the diameter of the pull pull
wheel - or arm- you use. 

I use a single piece of .038 kevcord with ends knotted through 4-40 brass
connectors (both from Aerospace Composite Products - ACP). The cable goes
from one connector into the fuse, to the pul- pull wheel on the servo - with
a turn around the set screw on the wheel, and back down, out the fuse and to
the other connector. 
Photo available of the servo end (when using a servo arm instead of a wheel)
is at
http://www.angelfire.com/nj3/rixplanes/images/Elev_Rudder%20servo%20mounts.j
pg
 
Hope this helps. 

Rick 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of John Pavlick
Sent: Friday, March 04, 2005 1:30 AM
To: NSRCA Discussion
Subject: How to set up pull-pull cables

I'm about to install my first pull-pull rudder cable setup. Any important
safety tips from you guys would be greatly appreciated. Especially what NOT
to do. TIA.

John Pavlick
http://www.idseng.com

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