---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Sat 07/08/17: 11 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:18 AM - Elevator Trim Servo (Ron Walker) 2. 06:28 AM - Re: Elevator Trim Servo (Phillip Perry) 3. 06:33 AM - Re: Elevator Trim Servo (Phillip Perry) 4. 08:15 AM - Re: Elevator Trim Servo (Marcus Cooper) 5. 04:35 PM - Re: F-1046 Longeron to F-1005E Gusset Holes (kearney) 6. 04:37 PM - Re: Tire / Brake Life (kearney) 7. 04:40 PM - Re: Elevator Trim Servo (Kelly McMullen) 8. 06:51 PM - Question for the IO-540 Engine Mavens (kearney) 9. 07:44 PM - Re: Question for the IO-540 Engine Mavens (David Carr) 10. 08:42 PM - Re: Elevator Trim Servo (Marcus Cooper) 11. 09:04 PM - Re: Elevator Trim Servo (Phillip Perry) ________________________________ Message 1 _____________________________________ Time: 06:18:42 AM PST US From: Ron Walker Subject: RV10-List: Elevator Trim Servo Doing some T&G last evening in the 10 ... with just me on board, final typically has me full nose up on the trim - even with that, I still need some back pressure ... but that's not the story. Anyway, on roll-out, I was moving the tab back to neutral and realized it was taking a LOT longer to reset than usual. Eventually I determined that it was not moving at all. The trim had stopped in the full nose up (tab down) position. Some troubleshooting after shutdown revealed the mechanism is not jammed, it still gets power - when activated, the unit does some "whirring" - but the jack screw does not move. It appears something INTERNAL to the unit has failed. In all my years flying RV's, I've never heard of a single failure in this manner. Anyone ? Really wish I had used a DB9 or some other quick connect for this ... --Ron ________________________________ Message 2 _____________________________________ Time: 06:28:33 AM PST US From: Phillip Perry Subject: Re: RV10-List: Elevator Trim Servo We just replaced one on a -10 on our field. Exactly the same failure after some T&G's in the evening. There was noise but no movement as a gear broke inside the unit. It was ~10 years old, FYI. I suspect this servo gets more use (and high pressures on the mechanisms) than any other servo (Aileron and rudder for those who have rudder trim). Sent from my iPhone > On Jul 8, 2017, at 7:18 AM, Ron Walker wrote: > > > Doing some T&G last evening in the 10 ... with just me on board, final typically has me full nose up on the trim - even with that, I still need some back pressure ... but that's not the story. > > Anyway, on roll-out, I was moving the tab back to neutral and realized it was taking a LOT longer to reset than usual. Eventually I determined that it was not moving at all. The trim had stopped in the full nose up (tab down) position. > > Some troubleshooting after shutdown revealed the mechanism is not jammed, it still gets power - when activated, the unit does some "whirring" - but the jack screw does not move. It appears something INTERNAL to the unit has failed. > > In all my years flying RV's, I've never heard of a single failure in this manner. Anyone ? > > Really wish I had used a DB9 or some other quick connect for this ... > > --Ron > > > ________________________________ Message 3 _____________________________________ Time: 06:33:06 AM PST US From: Phillip Perry Subject: Re: RV10-List: Elevator Trim Servo Last message send too early. So I have been disabling auto-trim on my auto pilot. Just to keep it from working up a down until I can learn more about how much input it's putting into the system. I really don't want to go on a 3 hour flight and have the auto-trim running the tab the whole time when the trim is close enough that servo is close enough to handle the loads. So I've been using auto trim to get level and then shutting it down until it's needed. I don't know if it helps much, but I'm just hoping to extend the life of the servo by running it when it really doesn't need to be running. Phil Sent from my iPhone > On Jul 8, 2017, at 7:18 AM, Ron Walker wrote: > > > Doing some T&G last evening in the 10 ... with just me on board, final typically has me full nose up on the trim - even with that, I still need some back pressure ... but that's not the story. > > Anyway, on roll-out, I was moving the tab back to neutral and realized it was taking a LOT longer to reset than usual. Eventually I determined that it was not moving at all. The trim had stopped in the full nose up (tab down) position. > > Some troubleshooting after shutdown revealed the mechanism is not jammed, it still gets power - when activated, the unit does some "whirring" - but the jack screw does not move. It appears something INTERNAL to the unit has failed. > > In all my years flying RV's, I've never heard of a single failure in this manner. Anyone ? > > Really wish I had used a DB9 or some other quick connect for this ... > > --Ron > > > ________________________________ Message 4 _____________________________________ Time: 08:15:45 AM PST US From: Marcus Cooper Subject: Re: RV10-List: Elevator Trim Servo Phil, What kind of autopilot do you have? Just curious as I currently have the TruTrak which tells you a trim change is needed but doesn't actuate the trim. However, I am about to do a big panel upgrade which includes going to a Garmin G3X and Garmin autopilot servos and am wondering if it also ties into the trim? Thanks, Marcus > On Jul 8, 2017, at 9:32 AM, Phillip Perry wrote: > Do not archive > > Last message send too early. > > So I have been disabling auto-trim on my auto pilot. Just to keep it from working up a down until I can learn more about how much input it's putting into the system. I really don't want to go on a 3 hour flight and have the auto-trim running the tab the whole time when the trim is close enough that servo is close enough to handle the loads. > > So I've been using auto trim to get level and then shutting it down until it's needed. > > I don't know if it helps much, but I'm just hoping to extend the life of the servo by running it when it really doesn't need to be running. > > Phil > > > > > Sent from my iPhone > >> On Jul 8, 2017, at 7:18 AM, Ron Walker wrote: >> >> >> Doing some T&G last evening in the 10 ... with just me on board, final typically has me full nose up on the trim - even with that, I still need some back pressure ... but that's not the story. >> >> Anyway, on roll-out, I was moving the tab back to neutral and realized it was taking a LOT longer to reset than usual. Eventually I determined that it was not moving at all. The trim had stopped in the full nose up (tab down) position. >> >> Some troubleshooting after shutdown revealed the mechanism is not jammed, it still gets power - when activated, the unit does some "whirring" - but the jack screw does not move. It appears something INTERNAL to the unit has failed. >> >> In all my years flying RV's, I've never heard of a single failure in this manner. Anyone ? >> >> Really wish I had used a DB9 or some other quick connect for this ... >> >> --Ron >> >> >> > > > > ________________________________ Message 5 _____________________________________ Time: 04:35:54 PM PST US Subject: RV10-List: Re: F-1046 Longeron to F-1005E Gusset Holes From: "kearney" Hi I was reading this thread with some interest as I was about to do this step as well. Prior to drilling I marked where the holes would be using a sharpie through the gusset holes. The edge distance was not good for the aft most holes. The source of the problem was that the flange of the gusset was not parallel to the skin / longeron. I was think of using a shim to move the longeron inboard but then realized there was a much simpler solution. If you rotate the F-1005C you can get the gusset flange to line up parallel to the skin. This will give good edge distance. You will need to rotate the F1005 beyond where you want it a sit will spring back a little. Cheers Les C-GCWZ Flying C-GROK some assembly required Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470800#470800 ________________________________ Message 6 _____________________________________ Time: 04:37:12 PM PST US Subject: RV10-List: Re: Tire / Brake Life From: "kearney" Hi Bob Thanks for the info. It will be most useful, I don't know much about tires. Cheers Les Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470801#470801 ________________________________ Message 7 _____________________________________ Time: 04:40:34 PM PST US Subject: Re: RV10-List: Elevator Trim Servo From: Kelly McMullen I have the Dynon Skyview autopilot system, which shows on screen a trim command, which the autotrim then activates. At cruise the changes are rather minor and infrequent. In the pattern I hand fly anyway and do my own trimming.The Dynon autopilot panel adjusts trim motor speed automatically to be inverse to airspeed. On 7/8/2017 8:15 AM, Marcus Cooper wrote: > > Phil, > What kind of autopilot do you have? Just curious as I currently have the TruTrak which tells you a trim change is needed but doesn't actuate the trim. However, I am about to do a big panel upgrade which includes going to a Garmin G3X and Garmin autopilot servos and am wondering if it also ties into the trim? > > Thanks, > Marcus > >> On Jul 8, 2017, at 9:32 AM, Phillip Perry wrote: >> Do not archive >> >> Last message send too early. >> >> So I have been disabling auto-trim on my auto pilot. Just to keep it from working up a down until I can learn more about how much input it's putting into the system. I really don't want to go on a 3 hour flight and have the auto-trim running the tab the whole time when the trim is close enough that servo is close enough to handle the loads. >> >> So I've been using auto trim to get level and then shutting it down until it's needed. >> >> I don't know if it helps much, but I'm just hoping to extend the life of the servo by running it when it really doesn't need to be running. >> >> Phil >> >> >> >> >> Sent from my iPhone >> >>> On Jul 8, 2017, at 7:18 AM, Ron Walker wrote: >>> >>> >>> Doing some T&G last evening in the 10 ... with just me on board, final typically has me full nose up on the trim - even with that, I still need some back pressure ... but that's not the story. >>> >>> Anyway, on roll-out, I was moving the tab back to neutral and realized it was taking a LOT longer to reset than usual. Eventually I determined that it was not moving at all. The trim had stopped in the full nose up (tab down) position. >>> >>> Some troubleshooting after shutdown revealed the mechanism is not jammed, it still gets power - when activated, the unit does some "whirring" - but the jack screw does not move. It appears something INTERNAL to the unit has failed. >>> >>> In all my years flying RV's, I've never heard of a single failure in this manner. Anyone ? >>> >>> Really wish I had used a DB9 or some other quick connect for this ... >>> >>> --Ron >>> >>> >>> >> >> >> >> > > > > > ________________________________ Message 8 _____________________________________ Time: 06:51:26 PM PST US Subject: RV10-List: Question for the IO-540 Engine Mavens From: "kearney" Hi Today I got a line on an IO-540 AE1A5 engine that was in a helicopter. It has 500 TSNew. It has had a the helicopter equivalent of a prop strike and so needs to be inspected etc. Can anyone tell me if it possible to use this engine as a core for use in a -10. I would plan on having the engine inspected / overhauled / converted for use on my project if it makes economic sense. Inquiring minds need to know... Les C-GCWZ flying C-GROK some assembly required Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470805#470805 ________________________________ Message 9 _____________________________________ Time: 07:44:20 PM PST US From: David Carr Subject: Re: RV10-List: Question for the IO-540 Engine Mavens Hi Les, I don't thing this engine will be a good fit unfortunately. The IO-540 TCDS describes it as follows: -AE1A5 - Similar to O-540-F1B5 with IO-540-K angle valve cylinders, pistons, piston squirts and fuel injection and induction system. It will have angle valve cylinders which are too wide for the RV-10 cowl. It also weighs 416 lbs vs. the 379lbs of the stock D4A5. I'm not sure, but it's also likely that the sump and/or case geometry may cause issues. David On Sat, Jul 8, 2017 at 8:51 PM, kearney wrote: > > Hi > > Today I got a line on an IO-540 AE1A5 engine that was in a helicopter. It > has 500 TSNew. It has had a the helicopter equivalent of a prop strike and > so needs to be inspected etc. > > Can anyone tell me if it possible to use this engine as a core for use in > a -10. I would plan on having the engine inspected / overhauled / > converted for use on my project if it makes economic sense. > > Inquiring minds need to know... > > Les > > C-GCWZ flying > C-GROK some assembly required > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470805#470805 > > ________________________________ Message 10 ____________________________________ Time: 08:42:39 PM PST US From: Marcus Cooper Subject: Re: RV10-List: Elevator Trim Servo Thanks, I'll keep, an eye out for a similar system on the Garmin although I don't think it has control of the trim motor. Marcus > On Jul 8, 2017, at 7:38 PM, Kelly McMullen wrote: > Do not archive > > I have the Dynon Skyview autopilot system, which shows on screen a trim command, which the autotrim then activates. At cruise the changes are rather minor and infrequent. In the pattern I hand fly anyway and do my own trimming.The Dynon autopilot panel adjusts trim motor speed automatically to be inverse to airspeed. > >> On 7/8/2017 8:15 AM, Marcus Cooper wrote: >> Phil, >> What kind of autopilot do you have? Just curious as I currently have the TruTrak which tells you a trim change is needed but doesn't actuate the trim. However, I am about to do a big panel upgrade which includes going to a Garmin G3X and Garmin autopilot servos and am wondering if it also ties into the trim? >> Thanks, >> Marcus >>> On Jul 8, 2017, at 9:32 AM, Phillip Perry wrote: >>> Do not archive >>> >>> Last message send too early. >>> >>> So I have been disabling auto-trim on my auto pilot. Just to keep it from working up a down until I can learn more about how much input it's putting into the system. I really don't want to go on a 3 hour flight and have the auto-trim running the tab the whole time when the trim is close enough that servo is close enough to handle the loads. >>> >>> So I've been using auto trim to get level and then shutting it down until it's needed. >>> >>> I don't know if it helps much, but I'm just hoping to extend the life of the servo by running it when it really doesn't need to be running. >>> >>> Phil >>> >>> >>> >>> >>> Sent from my iPhone >>> >>>> On Jul 8, 2017, at 7:18 AM, Ron Walker wrote: >>>> >>>> >>>> Doing some T&G last evening in the 10 ... with just me on board, final typically has me full nose up on the trim - even with that, I still need some back pressure ... but that's not the story. >>>> >>>> Anyway, on roll-out, I was moving the tab back to neutral and realized it was taking a LOT longer to reset than usual. Eventually I determined that it was not moving at all. The trim had stopped in the full nose up (tab down) position. >>>> >>>> Some troubleshooting after shutdown revealed the mechanism is not jammed, it still gets power - when activated, the unit does some "whirring" - but the jack screw does not move. It appears something INTERNAL to the unit has failed. >>>> >>>> In all my years flying RV's, I've never heard of a single failure in this manner. Anyone ? >>>> >>>> Really wish I had used a DB9 or some other quick connect for this ... >>>> >>>> --Ron >>>> >>>> >>>> >>> >>> >>> >>> > > > ________________________________ Message 11 ____________________________________ Time: 09:04:50 PM PST US From: Phillip Perry Subject: Re: RV10-List: Elevator Trim Servo Marcus, Sorry I missed our message. Fortunately I saw it on Kelly's reply. I have the Garmin GX Pilot (TruTrak) with the G3X. It will tell you if you need trim up or down and then you just add it manually. For Auto-Trim, you have to get the Auto-Trim module from TruTrak and install it. I can look at my AP head and see when trim inputs are being sent from the TruTrak to the trim servo. Right now mine are fairly frequently and have experienced a couple if moments where it was putting inputs in so quickly that be plane never had time to respond before the next input was made. That created and pretty aggressive oscillation of about 30 ft high to 30 ft low as the auto-trim thought it was playing catchup, when in reality it was behind. Before my next flight, I'm going to make an adjustment to reduce the frequency of the auto-trim inputs. That will (should) give the plane some time to react before the next trim command is issued. Phil Sent from my iPhone > On Jul 8, 2017, at 5:38 PM, Kelly McMullen wrote: > > > I have the Dynon Skyview autopilot system, which shows on screen a trim command, which the autotrim then activates. At cruise the changes are rather minor and infrequent. In the pattern I hand fly anyway and do my own trimming.The Dynon autopilot panel adjusts trim motor speed automatically to be inverse to airspeed. > >> On 7/8/2017 8:15 AM, Marcus Cooper wrote: >> Phil, >> What kind of autopilot do you have? Just curious as I currently have the TruTrak which tells you a trim change is needed but doesn't actuate the trim. However, I am about to do a big panel upgrade which includes going to a Garmin G3X and Garmin autopilot servos and am wondering if it also ties into the trim? >> Thanks, >> Marcus >>> On Jul 8, 2017, at 9:32 AM, Phillip Perry wrote: >>> Do not archive >>> >>> Last message send too early. >>> >>> So I have been disabling auto-trim on my auto pilot. Just to keep it from working up a down until I can learn more about how much input it's putting into the system. I really don't want to go on a 3 hour flight and have the auto-trim running the tab the whole time when the trim is close enough that servo is close enough to handle the loads. >>> >>> So I've been using auto trim to get level and then shutting it down until it's needed. >>> >>> I don't know if it helps much, but I'm just hoping to extend the life of the servo by running it when it really doesn't need to be running. >>> >>> Phil >>> >>> >>> >>> >>> Sent from my iPhone >>> >>>> On Jul 8, 2017, at 7:18 AM, Ron Walker wrote: >>>> >>>> >>>> Doing some T&G last evening in the 10 ... with just me on board, final typically has me full nose up on the trim - even with that, I still need some back pressure ... but that's not the story. >>>> >>>> Anyway, on roll-out, I was moving the tab back to neutral and realized it was taking a LOT longer to reset than usual. Eventually I determined that it was not moving at all. The trim had stopped in the full nose up (tab down) position. >>>> >>>> Some troubleshooting after shutdown revealed the mechanism is not jammed, it still gets power - when activated, the unit does some "whirring" - but the jack screw does not move. It appears something INTERNAL to the unit has failed. >>>> >>>> In all my years flying RV's, I've never heard of a single failure in this manner. Anyone ? >>>> >>>> Really wish I had used a DB9 or some other quick connect for this ... >>>> >>>> --Ron >>>> >>>> >>>> >>> >>> >>> >>> > > > ------------------------------------------------------------------------------------- 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.