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
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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
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| Subject: | Re: Elevator Trim |
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:
>> <grbcmcfarlane@gmail.com>
>>
>> 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
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| Subject: | Re: 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 <Tim@myrv10.com> 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
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| Subject: | Re: 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 <Tim@myrv10.com> 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
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| Subject: | Re: Elevator Trim |
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 <Tim@myrv10.com> 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.
>>>>
>>>>
>>>>
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Message 6
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| Subject: | Re: 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 <grbcmcfarlane@gmail.com> 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
>
>
>
>
>
>
>
>
>
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