I have the same problem with the same setup on my Smaragd. This is the 1st plane I've had with a CF pushrod. All the others have had a pull pull to an MK device. I also changed the servo and it didn't change. The planes with the pull pull didn't have a trim changing problem. Mike<BR><BR><B><I>Bob Kane <getterflash@yahoo.com></I></B> wrote: <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">My new Temptation is using a carbon pushrod system for<BR>the elevator. The length is roughly 30" and it is all<BR>carbon from the servo to the elevator horns except for<BR>the titanium ends.<BR><BR>I have been experiencing significant (more on what I<BR>consider significant later) trim changes in elevator<BR>from one flight to another. I did some searching in<BR>the RCU forums and found a two year old thread, the<BR>conclusion (if there is such a thing in online forums)<BR>is the expansion/contraction of the composite
fuselage<BR>is large relative to the change of a carbon pushrod<BR>system if both are subjected to the same change in<BR>temperature.<BR><BR>What I mean by significant is two or three clicks as<BR>measured by my Stylus trim levers. My three previous<BR>pattern planes all featured rear mounted elevator<BR>servos with short (< 12") pushrod systems. These<BR>planes exhibited little trim change (1 click) with<BR>temperature swings.<BR><BR>I changed servos last night and will be test flying<BR>this evening to see if the servo was contributing to<BR>the trim change. <BR><BR>What are other experiences with carbon<BR>pushrod/composite fuselage combinations?<BR><BR>Bob Kane<BR>getterflash@yahoo.com<BR><BR>__________________________________________________<BR>Do You Yahoo!?<BR>Tired of spam? Yahoo! Mail has the best spam protection around <BR>http://mail.yahoo.com <BR>_______________________________________________<BR>NSRCA-discussion mailing
list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR></BLOCKQUOTE><BR><p>
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