<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">In a message dated 11/25/2003 11:47:15 PM Eastern Standard Time, tkeithb@comcast.net writes:<BR>
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<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:<B>Re: CTE </B><BR>
Date:11/25/2003 11:47:15 PM Eastern Standard Time<BR>
From:<A HREF="mailto:tkeithb@comcast.net">tkeithb@comcast.net</A><BR>
Reply-to:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
To:<A HREF="mailto:discussion@nsrca.org">discussion@nsrca.org</A><BR>
<I>Sent from the Internet </I><BR>
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Matt,</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=3 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">The negative CTE of Kevlar seems as though it would exaggerate the loosening and tightening of the cables. As the fuse shrinks the cables will lengthen and visa versa. </FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=3 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">How would this be better than metal cables?</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=3 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Keith Black</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=3 FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
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A case of too much info Keith. Some may have led you to believe that there is a great deal of expansion/contraction. In reality the amount of movement is too small to notice.About 1/32" is allthe movement that technically results from extreme temp swings.<BR>
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With Kevlar the CTE is negative, which means things get a little tight in the summer and a little loose in the winter, but if you did the installation correctly and applied the minimal tension required in the cables, it's a non-issue. The cables should be set-up with very little tension, and will easily absorb the movement. Be very fussy about having servo output arms on center of the rudder horn plane and elevator horn plane; also most imprtant is to have the clevises on the hinge line or very slightly aft for best results. Avoid being forward of the hinge line<BR>
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I don't change the tightness of my set-ups Winter to summer and back again. My planes are in trim better than push rods have been in the past, by a wide margin. Also, my set-ups have the cables, both sides, in slight tension all the time, in true pull-pull fashion. <BR>
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Guys get in trouble when they aren't really fussy during set-up and then blame the type of system they use. Have you seen how my Alliance just locks in pitch? It makes things very easy<BR>
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matt</FONT></HTML>