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<DIV><FONT face=Arial size=2>> <FONT face="Times New Roman" size=3>At this
point in time I have still not acquired the necessary intestinal fortitude to
use kevlar on the elevator.</FONT></FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>If you do use pull-pull on the elevator just use
completely independent cables to each elevator half. That way if one breaks the
other elevator half will still work. I've done this by connecting a ball link
clevis to each side of the servo control arm and running one elevator half from
one clevis and the other elevator half from the other clevis. If one cable
breaks it does not effect the other cable. Of course if your servo goes south
you're SOL, that's what's nice about two servos in the stab.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Keith</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=geobet@gis.net href="mailto:geobet@gis.net">george kennie</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> Tuesday, November 25, 2003 11:57
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: CTE</DIV>
<DIV><BR></DIV>Sorry to disagree here, but it would appear that the conclusion
being drawn by the respondants is that the pushrod expansion and contraction
is the major cause of the problem. Not so, in my experience! Going to
pull-pull cables, whether they be steel or kevlar thread will not get rid of
the elevator trim change under consideration here.The coefficient of thermal
expansion between the cables, which is very small, and the balsa in the fuse,
which is significantly greater(glass too) will generate a differential of
sufficient magnitude that the "devil" will still attack you when you least
expect it. <BR>The best solution that I have observed is to put the servos in
the stabs. Short of this, I have been using servos mounted just at the L.E. of
the stab and using a very short pushrod(approx. 6"). My current thinking is
that I will still mount the servo in the same area and go with cables.Very
light and direct. As regards Kevlar, I currently have a pattern practise ship
that I do almost all of my flying with that has kevlar on the rudder and it
has two years of mucho sequences to it's credit with no apparent wear or
abrasions to the thread. At this point in time I have still not acquired the
necessary intestinal fortitude to use kevlar on the elevator. <BR>Georgie
<P>Amir Neshati wrote:
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<FONT face=Arial><FONT size=-1>Pull-pull will eliminate the trim
change...</FONT></FONT> <FONT face=Arial><FONT
size=-1>Amir</FONT></FONT>
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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=natpenton@centurytel.net
href="mailto:natpenton@centurytel.net">Nat Penton</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> Monday, November 24, 2003 7:24
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> CTE</DIV> <FONT
face=Arial><FONT size=-1>Gray what is the CTI for balsa ? I have carbon
push rods / balsa fuse and my elev trim moves around considerably. I
suppose it is because of humidity variation between the shop and outdoors
?? The pushrods are 50" long.
NatPenton</FONT></FONT> </BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>