---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Tue 10/20/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:28 PM - Tru Trak Auto Pilot Servo (Trevor) 2. 04:29 PM - Re: Tru Trak Auto Pilot Servo (Michael Kraus) 3. 04:29 PM - Re: Tru Trak Auto Pilot Servo (Greg Young) ________________________________ Message 1 _____________________________________ Time: 03:28:06 PM PST US From: "Trevor" Subject: RV-List: Tru Trak Auto Pilot Servo I have a Tru Trak servo installed on my RV-7 elevator control and am picking up a sudden large resistance to movement. After almost disassembling my entire elevator system to find the "binding" I traced the problem to the servo. There is of course an expected resistance when moving the controls but I suddenly experienced a loud grinding noise which was reminiscent of say a control surface rubbing over corrugated conduit. I also found that the extra resistance was only evident when the electrical connections were made (9 - pin plug inserted) The same effect could be obtained when 4 of the 9 pins were grounded against the side of the plug. Electrical current not applied. This was not evident throughout construction and has only just manifested itself. (now that I am ready for my maiden flight!) My friends RV with identical setup does not have the resistance that I am experiencing. Any thoughts anyone? Trevor RV-7 Cape Town ________________________________ Message 2 _____________________________________ Time: 04:29:02 PM PST US From: Michael Kraus Subject: Re: RV-List: Tru Trak Auto Pilot Servo Yes, pull the servo and send it in. You sure don't need the autopilot on your maiden flight... Isn't the first instance of hearing of issues with the servos.... Sent from my iPhone On Oct 20, 2009, at 6:27 PM, "Trevor" wrote: > I have a Tru Trak servo installed on my RV-7 elevator control and am > picking up a sudden large resistance to movement. After almost > disassembling my entire elevator system to find the "binding" I > traced the problem to the servo. There is of course an expected > resistance when moving the controls but I suddenly experienced a > loud grinding noise which was reminiscent of say a control surface > rubbing over corrugated conduit. I also found that the extra > resistance was only evident when the electrical connections were > made (9 - pin plug inserted) The same effect could be obtained when > 4 of the 9 pins were grounded against the side of the plug. > Electrical current not applied. This was not evident throughout > construction and has only just manifested itself. (now that I am > ready for my maiden flight!) My friends RV with identical setup > does not have the resistance that I am experiencing. Any thoughts > anyone? > > Trevor RV-7 Cape Town > > ________________________________ Message 3 _____________________________________ Time: 04:29:02 PM PST US Subject: Re: RV-List: Tru Trak Auto Pilot Servo From: "Greg Young" Disconnect the servo, remove/secure the pushrod and fly the airplane. Regards, Greg -----Original Message----- From: "Trevor" Subject: RV-List: Tru Trak Auto Pilot Servo This is a multi-part message in MIME format. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv-list Browse Digests http://www.matronics.com/digest/rv-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.