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<DIV>I meant CTE. </DIV>
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<DIV>Matt</DIV>
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<DIV>In a message dated 5/9/2006 8:38:38 PM Eastern Standard Time, natpenton@centurytel.net writes:</DIV>
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<DIV><FONT face=Arial size=2>I think the "settling in" is due to the coating. I never experienced this with the bare unidirectional kevlar.</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=mailto:rcmaster199@aol.com href="mailto:rcmaster199@aol.com">rcmaster199@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=mailto:nsrca-discussion@lists.nsrca.org href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, May 09, 2006 5:40 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Elevator trim change</DIV>
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<DIV>Nat, et al, </DIV>
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<DIV>Kevlar actually has a negative COE, which, in theory at least, means it expands as it gets cooler. I saw a little of that in the stuff I used to make (the teflon coated type). Georgie is right that it took a couple weeks of settling in before adjustments held well over time. The negative COE still showed up when temps dropped, however, in a pull-pull set-up, it generally means nothing.</DIV>
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<DIV>As far as very low COE of carbon tow, yup that's correct. Carbon in a plastic matrix isn't quite as clear. Fiberglass in a plastic matrix has similar issues. It's the delta between the two material types that important. In my experience they move enough to require a click of trim change as temp varies, fairly normal this time of year in the NE. </DIV>
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<DIV>Matt</DIV> <BR>-----Original Message-----<BR>From: Nat Penton <natpenton@centurytel.net><BR>To: NSRCA Mailing List <nsrca-discussion@lists.nsrca.org><BR>Sent: Tue, 9 May 2006 13:08:26 -0500<BR>Subject: Re: [NSRCA-discussion] Elevator trim change<BR><BR>
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<DIV><FONT face=Arial size=2>George I agree with your comments with one exception. The Sullivan controll line kevlar is the best of all worlds for our hookups. There is no stretch, no weight, no electromagnetic problems. It is unidirectional with, probably, a low COE like carbon.</FONT></DIV></DIV></DIV></DIV></BLOCKQUOTE></BLOCKQUOTE></DIV>
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