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<DIV><FONT size=2>Keith,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I have used pull/pull on rudder and elevator for about 4 years
now. Have used it on several Sequels, Prophecies and Hydeouts. I
will be using it on my Typhoon 2k and Aries also. I usually use 50
to 60 pound test nylon coated 7 strand steel fishing leader. Kind of a
pain to rig and have to set the tension to your liking but a light and positive,
slop free set up. I guess the only real extra precaution that I take is to
use the nylon exit guides to avoid any chaffing on the coating at the fuse exit
points. Looks ok though.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Dan Curtis</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ronlock@comcast.net href="mailto:ronlock@comcast.net">ronlock</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, December 07, 2002 12:36
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Elevator control: Pull-pull
vs push rod</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>I use pull-pull with vinyl coated kevlar cord it
for rudder, </FONT></DIV>
<DIV><FONT face=Arial size=2>and have never had a failure. But somehow, I
can't<FONT face=Arial size=2> bring </FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT face=Arial size=2>myself to trust pull-pull
linkage for an elevator.</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I don't like bellcrank systems- I prefer to avoid
the weight</FONT></DIV>
<DIV><FONT face=Arial size=2>and additional linkage points.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Bushed at the rear push rods work OK, some
setups require </FONT></DIV>
<DIV><FONT face=Arial size=2>a bushing or vib</FONT><FONT face=Arial
size=2>ration dampener in the center.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Another possibility Ive used with good success a
few times -</FONT></DIV>
<DIV><FONT face=Arial size=2>Sullivan Precision Rod. It's a
golden rod type system but </FONT></DIV>
<DIV><FONT face=Arial size=2>the inner rod is carbon fiber
reinforced. It comes in</FONT></DIV>
<DIV><FONT face=Arial size=2>2-56 and 4-40 sizes. Using the 4-40
size for pattern birds, </FONT></DIV>
<DIV><FONT face=Arial><FONT size=2><FONT size=+0>I set up one
</FONT></FONT></FONT><FONT face=Arial size=2>outer/inner pushrod
sytem from the servo to a </FONT></DIV>
<DIV><FONT face=Arial size=2>point about </FONT><FONT face=Arial size=2>midway
between servo at stab. Then transition </FONT></DIV>
<DIV><FONT face=Arial size=2>to two </FONT><FONT face=Arial
size=2>outer/inner pushrods, one to each stab half. This set
up</FONT></DIV>
<DIV><FONT face=Arial size=2>requires mounting braces every 12 inches or
so. Where</FONT></DIV>
<DIV><FONT face=Arial size=2>you put the one rod to two transition isn't
critical, other than</FONT></DIV>
<DIV><FONT face=Arial size=2>placing it where you can reach it to work
on. Getting the </FONT></DIV>
<DIV><FONT face=Arial size=2>mounting </FONT><FONT face=Arial
size=2>braces into ther rear of a fuse shell may be a </FONT></DIV>
<DIV><FONT face=Arial size=2>difficult reach. Once
installed, it never vibrates or needs</FONT></DIV>
<DIV><FONT face=Arial size=2>maintenance.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Later</FONT></DIV>
<DIV><FONT face=Arial size=2>Ron Lockhart</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=tkeithb@attbi.com href="mailto:tkeithb@attbi.com">Keith Black</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, December 07, 2002 2:38
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Elevator control: Pull-pull vs
push rod</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>I'm in the process of building a new Aries and
am trying to decide whether to use pull-pull or a push-rod on the elevator.
I'd like to hear some opinions on which is the best way to go. I plan to go
with pull-pull on the rudder, but I'm undecided on the
elevator.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The Aries requires no formers so there would be
no problem with space in installing a pull-pull system for the elevator,
however I know there are different theories as to which is the best
approach. If you have an opinion please explain why you feel the way you do
(weight, control accuracy, reliability, etc.).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>For those push-rod proponents I'd be very
interested in hearing your opinion on the best approach to installing a push
rod system. For example using a "Y" push rod with bushings, using an bell
crank, etc. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I look forward to hearing everyone's
opinion.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV><FONT face=Arial size=2>Keith Black</FONT></DIV>
<DIV><FONT face=Arial
size=2></FONT> </DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>