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Ok, here is a brain teaser for you experts.<br><br>On Sunday 2 weeks ago I went out flying maybe 4-5 flights. All was <br>fine. When I got to the flying site on Friday for the Lake City <br>contest, I made a practice flight and the plane was climbing like mad. <br>I got it down and found that 1 of the elevator halves was about 3/8" up <br>from the other. Before the flight, I checked the operation of the <br>elevators and they were moving correctly but I don't remember <br>specifically if I paid any attention to if they were centered <br>perfectly. Now, nothing was changed between the the last time I flew <br>and this flight. The transmitter was on the right model. The linkage <br>had not slipped, nor had the control horn bent. The control surface <br>showed no sign of trauma from a severe bump possibly causing a stripped <br>gear. The servo (JR 3421sa) was functioning 100% normally it was just <br>the center had changed on it's own. I removed the servo arm (alum - not <br>stripped either) and moved it one spline and adjusted the sub trim <br>slightly and flew a few test flights and the contest with no problems. <br>Now at home, I removed the servo to send it back and inspected it and <br>found nothing abnormal. The gears all look fine. Here is what I have <br>eliminated:<br><br>servo arm - not stripped<br>servo gears - not stripped<br>pushrod and linkage - no play and not slipped on the clevis threads<br>transmitter - correct model selected and could not be elevator pot in <br>transmitter since it did not affect the other elevator servo's centering<br><br>I am sending it back for a check up but just was wondering if anyone has <br>had any similar experience ever or if they have any possible causes.<br><br>Thanks<br><br>Chris<br><br><br><br><br><br /><hr />Making the world a better place one message at a time. <a href='http://www.imtalkathon.com/?source=EML_WLH_Talkathon_BetterPlace' target='_new'>Check out the i'm Talkathon.</a></body>
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