---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Mon 03/21/22: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:07 AM - Elevator Trim (Greg McFarlane) 2. 06:07 AM - Re: Elevator Trim (Tim Olson) 3. 03:17 PM - Re: Elevator Trim (John MacCallum) 4. 03:45 PM - Re: Elevator Trim (Jesse Saint) 5. 04:41 PM - Re: Elevator Trim (Charlie England) 6. 06:01 PM - Re: Elevator Trim (Robert Jones) ________________________________ Message 1 _____________________________________ Time: 02:07:58 AM PST US Subject: RV10-List: Elevator Trim From: "Greg McFarlane" I've got the standard Ray Allen T3-12A on my RV10. Over the last month the VPX-Pro has tripped twice when I tried to centre the trim before engine start as I normally do. Both times after the circuit (2amp) was reset the trim worked flawlessly. Just wondering if others have had this happen ? And also what is the expected life of these units ? This one has done 750hours with all the usual climb, cruise and landing trim adjustments. Thanks in advance. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=506351#506351 ________________________________ Message 2 _____________________________________ Time: 06:07:37 AM PST US Subject: Re: RV10-List: Elevator Trim From: Tim Olson I know this probably doesn't help, but I'm still running the same servo from 2005/2006 at about 1500 hours. I have other friends with nearly as much time in the same situation. I haven't heard of them being a common failure. Tim On 3/21/2022 8:06 AM, Tim Olson wrote: > I know this probably doesn't help, but I'm still running the same servo > from 2005/2006 > at about 1500 hours. I have other friends with nearly as much time in > the same > situation. I haven't heard of them being a common failure. > Tim > > > > > On 3/21/2022 4:07 AM, Greg McFarlane wrote: >> >> >> I've got the standard Ray Allen T3-12A on my RV10. Over the last month >> the VPX-Pro has tripped twice when I tried to centre the trim before >> engine start as I normally do. Both times after the circuit (2amp) was >> reset the trim worked flawlessly. Just wondering if others have had >> this happen ? And also what is the expected life of these units ? This >> one has done 750hours with all the usual climb, cruise and landing >> trim adjustments. Thanks in advance. >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=506351#506351 >> >> >> >> >> >> >> >> >> > ________________________________ Message 3 _____________________________________ Time: 03:17:47 PM PST US From: John MacCallum Subject: Re: RV10-List: Elevator Trim Hi Tim, The run current for the servo is quite low but maybe the Voltage without the engine running and the Alternator online is causing a high start current to flow. Try reconfiguring the VPX for say 2.5 amps and see how that goes. Or maybe just move the setting of the Trim until after engine start and the Alt and Avionics are online. Cheers John MacCallum RV10 VH-DUU Sent from my iPhone > On 22 Mar 2022, at 12:07 am, Tim Olson wrote: > > > I know this probably doesn't help, but I'm still running the same servo from 2005/2006 > at about 1500 hours. I have other friends with nearly as much time in the same > situation. I haven't heard of them being a common failure. > Tim > > > >> On 3/21/2022 8:06 AM, Tim Olson wrote: >> I know this probably doesn't help, but I'm still running the same servo from 2005/2006 >> at about 1500 hours. I have other friends with nearly as much time in the same >> situation. I haven't heard of them being a common failure. >> Tim >>> On 3/21/2022 4:07 AM, Greg McFarlane wrote: >>> >>> I've got the standard Ray Allen T3-12A on my RV10. Over the last month the VPX-Pro has tripped twice when I tried to centre the trim before engine start as I normally do. Both times after the circuit (2amp) was reset the trim worked flawlessly. Just wondering if others have had this happen ? And also what is the expected life of these units ? This one has done 750hours with all the usual climb, cruise and landing trim adjustments. Thanks in advance. >>> >>> >>> >>> >>> Read this topic online here: >>> >>> http://forums.matronics.com/viewtopic.php?p=506351#506351 >>> >>> >>> >>> >>> >>> >>> >>> >>> > > > ________________________________ Message 4 _____________________________________ Time: 03:45:25 PM PST US From: Jesse Saint Subject: Re: RV10-List: Elevator Trim Listen to the motor as you run full travel. It should run full travel without the sound changing much except just a little bit at the end. I have seen a number of these break over the years because they were installed so the cable reaches its end before the motor does, and the motor stalls or breaks something internally. There is just the right amount of travel between the motor mechanism and the cables. You have to rig it just right to not bind. That could be causing your problem. Jesse Saint Saint Aviation, Inc. 352-427-0285 jesse@saintaviation.com Sent from my iPad > On Mar 21, 2022, at 9:15 AM, Tim Olson wrote: > > > I know this probably doesn't help, but I'm still running the same servo from 2005/2006 > at about 1500 hours. I have other friends with nearly as much time in the same > situation. I haven't heard of them being a common failure. > Tim > > > >> On 3/21/2022 8:06 AM, Tim Olson wrote: >> I know this probably doesn't help, but I'm still running the same servo from 2005/2006 >> at about 1500 hours. I have other friends with nearly as much time in the same >> situation. I haven't heard of them being a common failure. >> Tim >>> On 3/21/2022 4:07 AM, Greg McFarlane wrote: >>> >>> I've got the standard Ray Allen T3-12A on my RV10. Over the last month the VPX-Pro has tripped twice when I tried to centre the trim before engine start as I normally do. Both times after the circuit (2amp) was reset the trim worked flawlessly. Just wondering if others have had this happen ? And also what is the expected life of these units ? This one has done 750hours with all the usual climb, cruise and landing trim adjustments. Thanks in advance. >>> >>> >>> >>> >>> Read this topic online here: >>> >>> http://forums.matronics.com/viewtopic.php?p=506351#506351 >>> >>> >>> >>> >>> >>> >>> >>> >>> > > > ________________________________ Message 5 _____________________________________ Time: 04:41:35 PM PST US Subject: Re: RV10-List: Elevator Trim From: Charlie England Another data point is that ATC (automotive blade) fuses virtually never 'nuisance trip'. If you move the trim power wire to a feeder from the main bus, using an in-line 2A ATC fuse, you may find that the problem is not related to the trim system at all. (hint...hint) Charlie On 3/21/2022 5:45 PM, Jesse Saint wrote: > > Listen to the motor as you run full travel. It should run full travel without the sound changing much except just a little bit at the end. I have seen a number of these break over the years because they were installed so the cable reaches its end before the motor does, and the motor stalls or breaks something internally. There is just the right amount of travel between the motor mechanism and the cables. You have to rig it just right to not bind. That could be causing your problem. > > Jesse Saint > Saint Aviation, Inc. > 352-427-0285 > jesse@saintaviation.com > > Sent from my iPad > >> On Mar 21, 2022, at 9:15 AM, Tim Olson wrote: >> >> >> I know this probably doesn't help, but I'm still running the same servo from 2005/2006 >> at about 1500 hours. I have other friends with nearly as much time in the same >> situation. I haven't heard of them being a common failure. >> Tim >> >> >> >>> On 3/21/2022 8:06 AM, Tim Olson wrote: >>> I know this probably doesn't help, but I'm still running the same servo from 2005/2006 >>> at about 1500 hours. I have other friends with nearly as much time in the same >>> situation. I haven't heard of them being a common failure. >>> Tim >>>> On 3/21/2022 4:07 AM, Greg McFarlane wrote: >>>> >>>> I've got the standard Ray Allen T3-12A on my RV10. Over the last month the VPX-Pro has tripped twice when I tried to centre the trim before engine start as I normally do. Both times after the circuit (2amp) was reset the trim worked flawlessly. Just wondering if others have had this happen ? And also what is the expected life of these units ? This one has done 750hours with all the usual climb, cruise and landing trim adjustments. Thanks in advance. >>>> >>>> >>>> -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 6 _____________________________________ Time: 06:01:17 PM PST US From: Robert Jones Subject: Re: RV10-List: Elevator Trim Check to see if the circuit is set to trip if no load is detected. I had this problem with one of my Dynon EFIS screens. Robert Jones > On Mar 21, 2022, at 2:11 AM, Greg McFarlane wrote: > > > I've got the standard Ray Allen T3-12A on my RV10. Over the last month the VPX-Pro has tripped twice when I tried to centre the trim before engine start as I normally do. Both times after the circuit (2amp) was reset the trim worked flawlessly. Just wondering if others have had this happen ? And also what is the expected life of these units ? This one has done 750hours with all the usual climb, cruise and landing trim adjustments. Thanks in advance. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=506351#506351 > > > > > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv10-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV10-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/rv10-list Browse Digests http://www.matronics.com/digest/rv10-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.