Today's Message Index:
----------------------
1. 09:12 AM - Re: Stabilator Trim Motor (Anthony Royal)
2. 09:19 AM - Re: Stabilator Trim Motor (Bill Geipel)
3. 01:34 PM - Re: Stabilator Trim Motor (Anthony Royal)
4. 08:03 PM - Re: Stabilator Trim Motor (William Geipel)
5. 08:54 PM - Re: Stabilator Trim Motor (Anthony Royal)
Message 1
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| Subject: | Re: Stabilator Trim Motor |
Ok Bill and to all you L29 owners that have had some trouble with your tail
trim motor not working at times. Excuse the long narrative but I think it
is important to understand what may be going on with our motors and may sav
e time looking and troubleshooting everything but the motor.
I just picked up my tail trim motor and what he found might be a common pro
blem with these motors. First, the bearings were shot. They are magneto bea
rings and they don't make them anymore. So, he doesn't know how long he wil
l be able to get them. Down the road they may have to convert to a standard
sealed roller bearing. He only uses top of the ling bearings.....SKF, FAG,
etc.
Secondly, where the wiring harness goes just inside the motor, he found a w
ire that had the two ends butted together, as opposed to lapping over each
other and cold soldered. Definitely not an acceptable splice/connection in
any application. He said there had been arching between the wires for a ver
y long time and they finally burnt apart. He thinks this is what caused the
trim motor to be intermittent and finally fail, along with worn out bearin
gs. The safety wire with the red seals on the motor was still intact so the
wiring problem looks to be a manufacturing issue.
After the new bearings (and they are not cheap) and fixing the wire, the mo
tor runs perfectly, quiet, and drives the jack screw now as it should.
After talking with the owner, he has agreed to look at your trim motors and
see if they can be fixed. He does not work on the jack screw assy, only th
e trim motor, but send the complete assy. The only stipulation is you will
need to sign a liability release, releasing him and the business from ANY a
nd ALL liability associated with the repair of the electric motor before he
does any work. I had to sign a release when I picked up my motor. The gent
leman is very knowledgeable, thorough, and honest.=C2-
So, here is the contact info:
Owner's name is Mike Loving
Blue Ridge Servo Motor Repair, LLC1017 Tennessee St.Salem, Virginia =C2-2
4153Phone: 540-375-2990email: blueridgeservomotor@gmail.com
Hope this helps.Tony
On Monday, June 19, 2017 10:09 AM, Anthony Royal <skyking76t@verizon.ne
t> wrote:
Sorry, it didn't come across like that but that happens with emails. My ap
ologies.
I will post shortly. He's having to find the bearings. The bearings are mag
neto bearings and his normal supplier won't sell to him because it's for an
aircraft. He's going to another source.
On Monday, June 19, 2017 8:16 AM, William Geipel <l129bs@gmail.com> wro
te:
Mine was a joke, but, we really want to know where to send it.
to quote the Pres. sad!
On Jun 18, 2017, at 09:06, Anthony Royal <skyking76t@verizon.net> wrote:
I would guess there are some intelligent people out there who maybe would l
ike to know what may be causing their trim motor problem. If you don't want
to know, then don't read it! =C2-Contribute something constructive inste
ad of sarcasm.
Hey, maybe I'll trade the trim motor repair info for a few flares.....peopl
e in glass houses shouldn't throw stones.
On Sunday, June 18, 2017 9:19 AM, Anthony Royal <skyking76t@verizon.net
> wrote:
Play nice or I'll go home with my trim motor
On Saturday, June 17, 2017 7:53 PM, William Geipel <l129bs@gmail.com> w
rote:
We don=99t care how he did it. Just tell him to remember and make su
re you keep his contact info for us to ship ours.
Bill
On Jun 17, 2017, at 15:14, Anthony Royal <skyking76t@verizon.net> wrote:
I told him he might be going into a new business because trim motors seem t
o be a common problem with the L29
On Saturday, June 17, 2017 1:20 PM, John Cabrera <jetblast1@me.com> wro
te:
If it works he is our new trim motor guy.
john cabrera
On Jun 17, 2017, at 6:48 AM, Anthony Royal <skyking76t@verizon.net> wrote:
The tech still has the trim motor assy as he has to get the old bearings ou
t of the housing and order new bearings (metric you know) and lubricate eve
rything with new grease. We spent about 4 hours just to troubleshoot. The m
otor has an ingenious electromagnetic brake inside so when power is interru
pted, the motor/jackscrew rotation stops and it is held in place. Interesti
ngly, before we separated the motor from the jack screw housing, turning th
e armature by hand would not retract or extend the jack screw but turning t
he adapter on the jack screw housing did extend and retract the jack screw.
So it's pretty much narrowed it down to the motor itself. Being that the m
otor would not run initially when power was applied and took some unusual e
ffort to get it started, confidence is high the bearings are the issue. Che
cking the field coils with a meter showed good. Brushes were like new. Also
, being that the trim motor worked initially for departure but nothing from
there on, pretty much pointed to the trim motor. I had cycled several time
s on the ground and got the trim moving light so the aircraft system seems
to be good.
We didn't take any photos at that time cause we didn't know what we were lo
oking for but I will ask if he can when he puts back together. Basically, s
eparate the motor from the jack screw housing. Gently pull apart and you wi
ll see the electrobrake. In the end of the motor there is an insert that co
uples the motor to the brake. Remove it by pulling straight out to see the
front bearing. When we got the motor running, not at full rpm, you could se
e the ball bearings and some were turning at a different speed or not at al
l and you could see the armature just barely wobbling. There's only about 0
.020" clearance between the armature and field coils. You could hearing the
grinding of the bad bearings or possibly the armature hitting and feel the
vibration in the motor itself. The grease being 20+ years old and having n
o lubricity left, more than likely caused the bearings to fail and when pow
er was applied, allowed the armature to cock just enough to be out of align
ment with the field coil.
This is our theory but it seems to be validated by what we did but will kno
w more once we get the new bearings installed. I will post more later once
we get the new bearings installed, test the motor on the bench, and test in
the plane.=C2-
Tony
On Saturday, June 17, 2017 3:24 AM, Hartley Postlethwaite <hap1995@yaho
o.com> wrote:
Do you have any good pictures?=C2- This could be a good small comment to
put in the next Red Alert.=C2- Deadline is the end of this month for subm
issions.
Feel free to send me a PM.
Postal
RPA President
FlyingHartley@gmail.com
http://www.matronics.com/Navigsp; =C2- =C2- =C2- =C2- =C2- - MATR
ONICS WEB FORUMS -
http://forum=C2- =C2- =C2- =C2- =C2- =C2- - NEW MATRONICS LIST
WIKI -
http://wiki.matronics.com
http://www.matronics.com/c
Message 2
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| Subject: | Re: Stabilator Trim Motor |
how much was it?
should we order the bearings to have them I stock while he can still find
them?
On Jun 22, 2017 10:13 AM, "Anthony Royal" <skyking76t@verizon.net> wrote:
Ok Bill and to all you L29 owners that have had some trouble with your tail
trim motor not working at times. Excuse the long narrative but I think it
is important to understand what may be going on with our motors and may
save time looking and troubleshooting everything but the motor.
I just picked up my tail trim motor and what he found might be a common
problem with these motors. First, the bearings were shot. They are magneto
bearings and they don't make them anymore. So, he doesn't know how long he
will be able to get them. Down the road they may have to convert to a
standard sealed roller bearing. He only uses top of the ling
bearings.....SKF, FAG, etc.
Secondly, where the wiring harness goes just inside the motor, he found a
wire that had the two ends butted together, as opposed to lapping over each
other and cold soldered. Definitely not an acceptable splice/connection in
any application. He said there had been arching between the wires for a
very long time and they finally burnt apart. He thinks this is what caused
the trim motor to be intermittent and finally fail, along with worn out
bearings. The safety wire with the red seals on the motor was still intact
so the wiring problem looks to be a manufacturing issue.
After the new bearings (and they are not cheap) and fixing the wire, the
motor runs perfectly, quiet, and drives the jack screw now as it should.
After talking with the owner, he has agreed to look at your trim motors and
see if they can be fixed. He does not work on the jack screw assy, only the
trim motor, but send the complete assy. *The only stipulation is you will
need to sign a liability release, releasing him and the business from ANY
and ALL liability associated with the repair of the electric motor before
he does any work.* I had to sign a release when I picked up my motor. The
gentleman is very knowledgeable, thorough, and honest.
So, here is the contact info:
Owner's name is Mike Loving
Blue Ridge Servo Motor Repair, LLC
1017 Tennessee St.
Salem, Virginia 24153
Phone: 540-375-2990 <(540)%20375-2990>
email: blueridgeservomotor@gmail.com
Hope this helps.
Tony
On Monday, June 19, 2017 10:09 AM, Anthony Royal <skyking76t@verizon.net>
wrote:
Sorry, it didn't come across like that but that happens with emails. My
apologies.
I will post shortly. He's having to find the bearings. The bearings are
magneto bearings and his normal supplier won't sell to him because it's for
an aircraft. He's going to another source.
On Monday, June 19, 2017 8:16 AM, William Geipel <l129bs@gmail.com> wrote:
Mine was a joke, but, we really want to know where to send it.
to quote the Pres. sad!
On Jun 18, 2017, at 09:06, Anthony Royal <skyking76t@verizon.net> wrote:
I would guess there are some intelligent people out there who maybe would
like to know what may be causing their trim motor problem. If you don't
want to know, then don't read it! Contribute something constructive
instead of sarcasm.
Hey, maybe I'll trade the trim motor repair info for a few
flares.....people in glass houses shouldn't throw stones.
On Sunday, June 18, 2017 9:19 AM, Anthony Royal <skyking76t@verizon.net>
wrote:
Play nice or I'll go home with my trim motor
On Saturday, June 17, 2017 7:53 PM, William Geipel <l129bs@gmail.com> wrote
:
We don=99t care how he did it. Just tell him to remember and make sur
e you
keep his contact info for us to ship ours.
Bill
On Jun 17, 2017, at 15:14, Anthony Royal <skyking76t@verizon.net> wrote:
I told him he might be going into a new business because trim motors seem
to be a common problem with the L29
On Saturday, June 17, 2017 1:20 PM, John Cabrera <jetblast1@me.com> wrote:
If it works he is our new trim motor guy.
john cabrera
On Jun 17, 2017, at 6:48 AM, Anthony Royal <skyking76t@verizon.net> wrote:
The tech still has the trim motor assy as he has to get the old bearings
out of the housing and order new bearings (metric you know) and lubricate
everything with new grease. We spent about 4 hours just to troubleshoot.
The motor has an ingenious electromagnetic brake inside so when power is
interrupted, the motor/jackscrew rotation stops and it is held in place.
Interestingly, before we separated the motor from the jack screw housing,
turning the armature by hand would not retract or extend the jack screw but
turning the adapter on the jack screw housing did extend and retract the
jack screw. So it's pretty much narrowed it down to the motor itself. Being
that the motor would not run initially when power was applied and took some
unusual effort to get it started, confidence is high the bearings are the
issue. Checking the field coils with a meter showed good. Brushes were like
new. Also, being that the trim motor worked initially for departure but
nothing from there on, pretty much pointed to the trim motor. I had cycled
several times on the ground and got the trim moving light so the aircraft
system seems to be good.
We didn't take any photos at that time cause we didn't know what we were
looking for but I will ask if he can when he puts back together. Basically,
separate the motor from the jack screw housing. Gently pull apart and you
will see the electrobrake. In the end of the motor there is an insert that
couples the motor to the brake. Remove it by pulling straight out to see
the front bearing. When we got the motor running, not at full rpm, you
could see the ball bearings and some were turning at a different speed or
not at all and you could see the armature just barely wobbling. There's
only about 0.020" clearance between the armature and field coils. You could
hearing the grinding of the bad bearings or possibly the armature hitting
and feel the vibration in the motor itself. The grease being 20+ years old
and having no lubricity left, more than likely caused the bearings to fail
and when power was applied, allowed the armature to cock just enough to be
out of alignment with the field coil.
This is our theory but it seems to be validated by what we did but will
know more once we get the new bearings installed. I will post more later
once we get the new bearings installed, test the motor on the bench, and
test in the plane.
Tony
On Saturday, June 17, 2017 3:24 AM, Hartley Postlethwaite <hap1995@yahoo.co
m>
wrote:
Do you have any good pictures? This could be a good small comment to put
in the next Red Alert. Deadline is the end of this month for submissions.
Feel free to send me a PM.
Postal
RPA President
FlyingHartley@gmail.com
http://www.matronics.com/Navigsp; - MATRONICS WEB FORUMS -
http://forum - NEW MATRONICS LIST WIKI -
http://wiki.matronics.com <http://forums.matronics.com/>
http://www.matronics.com/c
Message 3
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| Subject: | Re: Stabilator Trim Motor |
My bill was just under $400. There were several hours of trouble shooting t
ime. With the electromomagnetic brake inside it's a little more complicated
than a standard motor, plus the bearings and shipping cost to get the bear
ings so I could pick up today today, plus the wiring repair. He's going on
vacation tomorrow till the 8th and I'm leaving for South America tomorrow.
I guess each bill will vary.
May not be a bad idea to have the bearings on hand. They would have to be p
repaid for though. =C2-I don't have the part numbers myself. Would have t
o call the owner.
On Thursday, June 22, 2017 12:22 PM, Bill Geipel <l129bs@gmail.com> wro
te:
how much was it?should we order the bearings to have them I stock while he
can still find them?
On Jun 22, 2017 10:13 AM, "Anthony Royal" <skyking76t@verizon.net> wrote:
Ok Bill and to all you L29 owners that have had some trouble with your tail
trim motor not working at times. Excuse the long narrative but I think it
is important to understand what may be going on with our motors and may sav
e time looking and troubleshooting everything but the motor.
I just picked up my tail trim motor and what he found might be a common pro
blem with these motors. First, the bearings were shot. They are magneto bea
rings and they don't make them anymore. So, he doesn't know how long he wil
l be able to get them. Down the road they may have to convert to a standard
sealed roller bearing. He only uses top of the ling bearings.....SKF, FAG,
etc.
Secondly, where the wiring harness goes just inside the motor, he found a w
ire that had the two ends butted together, as opposed to lapping over each
other and cold soldered. Definitely not an acceptable splice/connection in
any application. He said there had been arching between the wires for a ver
y long time and they finally burnt apart. He thinks this is what caused the
trim motor to be intermittent and finally fail, along with worn out bearin
gs. The safety wire with the red seals on the motor was still intact so the
wiring problem looks to be a manufacturing issue.
After the new bearings (and they are not cheap) and fixing the wire, the mo
tor runs perfectly, quiet, and drives the jack screw now as it should.
After talking with the owner, he has agreed to look at your trim motors and
see if they can be fixed. He does not work on the jack screw assy, only th
e trim motor, but send the complete assy. The only stipulation is you will
need to sign a liability release, releasing him and the business from ANY a
nd ALL liability associated with the repair of the electric motor before he
does any work. I had to sign a release when I picked up my motor. The gent
leman is very knowledgeable, thorough, and honest.=C2-
So, here is the contact info:
Owner's name is Mike Loving
Blue Ridge Servo Motor Repair, LLC1017 Tennessee St.Salem, Virginia =C2-2
4153Phone: 540-375-2990email: blueridgeservomotor@gmail.com
Hope this helps.Tony
On Monday, June 19, 2017 10:09 AM, Anthony Royal <skyking76t@verizon.ne
t> wrote:
Sorry, it didn't come across like that but that happens with emails. My ap
ologies.
I will post shortly. He's having to find the bearings. The bearings are mag
neto bearings and his normal supplier won't sell to him because it's for an
aircraft. He's going to another source.
On Monday, June 19, 2017 8:16 AM, William Geipel <l129bs@gmail.com> wro
te:
Mine was a joke, but, we really want to know where to send it.
to quote the Pres. sad!
On Jun 18, 2017, at 09:06, Anthony Royal <skyking76t@verizon.net> wrote:
I would guess there are some intelligent people out there who maybe would l
ike to know what may be causing their trim motor problem. If you don't want
to know, then don't read it!=C2- Contribute something constructive inste
ad of sarcasm.
Hey, maybe I'll trade the trim motor repair info for a few flares.....peopl
e in glass houses shouldn't throw stones.
On Sunday, June 18, 2017 9:19 AM, Anthony Royal <skyking76t@verizon.net
> wrote:
Play nice or I'll go home with my trim motor
On Saturday, June 17, 2017 7:53 PM, William Geipel <l129bs@gmail.com> w
rote:
We don=99t care how he did it. Just tell him to remember and make su
re you keep his contact info for us to ship ours.
Bill
On Jun 17, 2017, at 15:14, Anthony Royal <skyking76t@verizon.net> wrote:
I told him he might be going into a new business because trim motors seem t
o be a common problem with the L29
On Saturday, June 17, 2015994120586602274473yiv8510581628" href="mailt
o:jetblast1@me.com" target="_blank">jetblast1@me.com> wrote:
john cabrera
On Jun 17, 2017, at 6:48 AM, Anthony Royal <skyking76t@verizon.net> wrote:
The tech still has the trim motor assy as he has to get the old bearings ou
t of the housing and order new bearings (metric you know) and lubricate eve
rything with new grease. We spent about 4 hours just to troubleshoot. The m
otor has an ingenious electromagnetic brake inside so when power is interru
pted, the motor/jackscrew rotation stops and it is held in place. Interesti
ngly, before we separated the motor from the jack screw housing, turning th
e armature by hand would not retract or extend the jack screw but turning t
he adapter on the jack screw housing did extend and retract the jack screw.
So it's pretty much narrowed it down to the motor itself. Being that the m
otor would not run initially when power was applied and took some unusual e
ffort to get it started, confidence is high the bearings are the issue. Che
cking the field coils with a meter showed good. Brushes were like new. Also
, being that the trim motor worked initially for departure but nothing from
there on, pretty much pointed to the trim motor. I had cycled several time
s on the ground and got the trim moving light so the aircraft system seems
to be good.
We didn't take any photos at that time cause we didn't know what we were lo
oking for but I will ask if he can when he puts back together. Basically, s
eparate the motor from the jack screw housing. Gently pull apart and you wi
ll see the electrobrake. In the end of the motor there is an insert that co
uples the motor to the brake. Remove it by pulling straight out to see the
front bearing. When we got the motor running, not at full rpm, you could se
e the ball bearings and some were turning at a different speed or not at al
l and you could see the armature just barely wobbling. There's only about 0
.020" clearance between the armature and field coils. You could hearing the
grinding of the bad bearings or possibly the armature hitting and feel the
vibration in the motor itself. The grease being 20+ years old and having n
o lubricity left, more than likely caused the bearings to fail and when pow
er was applied, allowed the armature to cock just enough to be out of align
ment with the field coil.
This is our theory but it seems to be validated by what we did but will kno
w more once we get the new bearings installed. I will post more later once
we get the new bearings installed, test the motor on the bench, and test in
the plane.=C2-Tony
On Saturday, June 17, 2017 3:24 AM, Hartley Postlethwaite <hap1995@yaho
o.com> wrote:
Do you have any good pictures?=C2- This could be a good small comment to
put in the next Red Alert.=C2- Deadline is the end of this month for subm
issions.
Feel free to send me a PM.
Postal
RPA President
FlyingHartley@gmail.com
http://www.matronics.com/ Navigsp; =C2- =C2- =C2- =C2- =C2- - MAT
RONICS WEB FORUMS -
http://forum=C2- =C2- =C2- =C2- =C2- =C2- - NEW MATRONICS LIST
WIKI -
http://wiki.matronics.com
http://www.matronics.com/c
Message 4
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|
| Subject: | Re: Stabilator Trim Motor |
A replacement would cost more so not a bad deal.
Find out how much for the bearings and I would like to order a set.
> On Jun 22, 2017, at 14:33, Anthony Royal <skyking76t@verizon.net>
wrote:
>
> My bill was just under $400. There were several hours of trouble
shooting time. With the electromomagnetic brake inside it's a little
more complicated than a standard motor, plus the bearings and shipping
cost to get the bearings so I could pick up today today, plus the wiring
repair. He's going on vacation tomorrow till the 8th and I'm leaving for
South America tomorrow. I guess each bill will vary.
>
> May not be a bad idea to have the bearings on hand. They would have to
be prepaid for though. I don't have the part numbers myself. Would have
to call the owner.
>
>
>
>
>
>
>
>
>
> On Thursday, June 22, 2017 12:22 PM, Bill Geipel <l129bs@gmail.com>
wrote:
>
>
> how much was it?
> should we order the bearings to have them I stock while he can still
find them?
>
> On Jun 22, 2017 10:13 AM, "Anthony Royal" <skyking76t@verizon.net
<mailto:skyking76t@verizon.net>> wrote:
> Ok Bill and to all you L29 owners that have had some trouble with your
tail trim motor not working at times. Excuse the long narrative but I
think it is important to understand what may be going on with our motors
and may save time looking and troubleshooting everything but the motor.
> I just picked up my tail trim motor and what he found might be a
common problem with these motors. First, the bearings were shot. They
are magneto bearings and they don't make them anymore. So, he doesn't
know how long he will be able to get them. Down the road they may have
to convert to a standard sealed roller bearing. He only uses top of the
ling bearings.....SKF, FAG, etc.
>
> Secondly, where the wiring harness goes just inside the motor, he
found a wire that had the two ends butted together, as opposed to
lapping over each other and cold soldered. Definitely not an acceptable
splice/connection in any application. He said there had been arching
between the wires for a very long time and they finally burnt apart. He
thinks this is what caused the trim motor to be intermittent and finally
fail, along with worn out bearings. The safety wire with the red seals
on the motor was still intact so the wiring problem looks to be a
manufacturing issue.
>
> After the new bearings (and they are not cheap) and fixing the wire,
the motor runs perfectly, quiet, and drives the jack screw now as it
should.
>
> After talking with the owner, he has agreed to look at your trim
motors and see if they can be fixed. He does not work on the jack screw
assy, only the trim motor, but send the complete assy. The only
stipulation is you will need to sign a liability release, releasing him
and the business from ANY and ALL liability associated with the repair
of the electric motor before he does any work. I had to sign a release
when I picked up my motor. The gentleman is very knowledgeable,
thorough, and honest.
>
> So, here is the contact info:
>
> Owner's name is Mike Loving
>
> Blue Ridge Servo Motor Repair, LLC
> 1017 Tennessee St.
> Salem, Virginia 24153
> Phone: 540-375-2990
<applewebdata://9B6F5A25-4681-42CC-BD71-5688AF8F3BC4>
> email: blueridgeservomotor@gmail.com
<mailto:blueridgeservomotor@gmail.com>
>
> Hope this helps.
> Tony
>
>
>
>
> On Monday, June 19, 2017 10:09 AM, Anthony Royal
<skyking76t@verizon.net <mailto:skyking76t@verizon.net>> wrote:
>
>
> Sorry, it didn't come across like that but that happens with emails.
My apologies.
>
> I will post shortly. He's having to find the bearings. The bearings
are magneto bearings and his normal supplier won't sell to him because
it's for an aircraft. He's going to another source.
>
>
>
>
> On Monday, June 19, 2017 8:16 AM, William Geipel <l129bs@gmail.com
<mailto:l129bs@gmail.com>> wrote:
>
>
> Mine was a joke, but, we really want to know where to send it.
>
> to quote the Pres. sad!
>> On Jun 18, 2017, at 09:06, Anthony Royal <skyking76t@verizon.net
<mailto:skyking76t@verizon.net>> wrote:
>>
>> I would guess there are some intelligent people out there who maybe
would like to know what may be causing their trim motor problem. If you
don't want to know, then don't read it! Contribute something
constructive instead of sarcasm.
>>
>> Hey, maybe I'll trade the trim motor repair info for a few
flares.....people in glass houses shouldn't throw stones.
>>
>>
>>
>>
>> On Sunday, June 18, 2017 9:19 AM, Anthony Royal
<skyking76t@verizon.net <mailto:skyking76t@verizon.net>> wrote:
>>
>>
>> Play nice or I'll go home with my trim motor
>>
>>
>> On Saturday, June 17, 2017 7:53 PM, William Geipel <l129bs@gmail.com
<mailto:l129bs@gmail.com>> wrote:
>>
>>
>> We don=99t care how he did it. Just tell him to remember and
make sure you keep his contact info for us to ship ours.
>>
>> Bill
>>
>>
>>
>>> On Jun 17, 2017, at 15:14, Anthony Royal <skyking76t@verizon.net
<mailto:skyking76t@verizon.net>> wrote:
>>>
>>> I told him he might be going into a new business because trim motors
seem to be a common problem with the L29
>>>
>>>
>>> On Saturday, June 17, 2015994120586602274473yiv8510581628"
href="mailto:jetblast1@me.com" target="_blank">jetblast1@me.com>
wrote:
>>>
>>>
>>>
>>> john cabrera
>>>
>>>
>>>
>>>> On Jun 17, 2017, at 6:48 AM, Anthony Royal <skyking76t@verizon.net
<mailto:skyking76t@verizon.net>> wrote:
>>>>
>>>> The tech still has the trim motor assy as he has to get the old
bearings out of the housing and order new bearings (metric you know) and
lubricate everything with new grease. We spent about 4 hours just to
troubleshoot. The motor has an ingenious electromagnetic brake inside so
when power is interrupted, the motor/jackscrew rotation stops and it is
held in place. Interestingly, before we separated the motor from the
jack screw housing, turning the armature by hand would not retract or
extend the jack screw but turning the adapter on the jack screw housing
did extend and retract the jack screw. So it's pretty much narrowed it
down to the motor itself. Being that the motor would not run initially
when power was applied and took some unusual effort to get it started,
confidence is high the bearings are the issue. Checking the field coils
with a meter showed good. Brushes were like new. Also, being that the
trim motor worked initially for departure but nothing from there on,
pretty much pointed to the trim motor. I had cycled several times on the
ground and got the trim moving light so the aircraft system seems to be
good.
>>>>
>>>> We didn't take any photos at that time cause we didn't know what we
were looking for but I will ask if he can when he puts back together.
Basically, separate the motor from the jack screw housing. Gently pull
apart and you will see the electrobrake. In the end of the motor there
is an insert that couples the motor to the brake. Remove it by pulling
straight out to see the front bearing. When we got the motor running,
not at full rpm, you could see the ball bearings and some were turning
at a different speed or not at all and you could see the armature just
barely wobbling. There's only about 0.020" clearance between the
armature and field coils. You could hearing the grinding of the bad
bearings or possibly the armature hitting and feel the vibration in the
motor itself. The grease being 20+ years old and having no lubricity
left, more than likely caused the bearings to fail and when power was
applied, allowed the armature to cock just enough to be out of alignment
with the field coil.
>>>>
>>>> This is our theory but it seems to be validated by what we did but
will know more once we get the new bearings installed. I will post more
later once we get the new bearings installed, test the motor on the
bench, and test in the plane.
>>>> Tony
>>>>
>>>>
>>>>
>>>> On Saturday, June 17, 2017 3:24 AM, Hartley Postlethwaite
<hap1995@yahoo.com <mailto:hap1995@yahoo.com>> wrote:
>>>>
>>>>
<hap1995@yahoo.com <mailto:hap1995@yahoo.com>>
>>>>
>>>> Do you have any good pictures? This could be a good small comment
to put in the next Red Alert. Deadline is the end of this month for
submissions.
>>>>
>>>> Feel free to send me a PM.
>>>>
>>>> Postal
>>>> FlyingHartley@gmail.com <mailto:FlyingHartley@gmail.com>
>>>>
>>>> http://www.matronics.com/ Navigsp
<http://www.matronics.com/Navigsp>; - MATRONICS WEB FORUMS -
>>>> http://forum=C2- =C2- =C2- =C2- =C2- =C2- - NEW
MATRONICS LIST WIKI -
>>>> http://wiki.matronics.com <http://forums.matronics.com/>
>>>> http://www.matronics.com/c <http://www.matronics.com/c>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>
>
>
>
>
>
>
>
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| Subject: | Re: Stabilator Trim Motor |
Will do.
Tony
On Thursday, June 22, 2017 11:05 PM, William Geipel <l129bs@gmail.com>
wrote:
A replacement would cost more so not a bad deal.Find out how much for the
bearings and I would like to order a set.
On Jun 22, 2017, at 14:33, Anthony Royal <skyking76t@verizon.net> wrote:
My bill was just under $400. There were several hours of trouble shooting t
ime. With the electromomagnetic brake inside it's a little more complicated
than a standard motor, plus the bearings and shipping cost to get the bear
ings so I could pick up today today, plus the wiring repair. He's going on
vacation tomorrow till the 8th and I'm leaving for South America tomorrow.
I guess each bill will vary.
May not be a bad idea to have the bearings on hand. They would have to be p
repaid for though. =C2-I don't have the part numbers myself. Would have t
o call the owner.
On Thursday, June 22, 2017 12:22 PM, Bill Geipel <l129bs@gmail.com> wro
te:
how much was it?should we order the bearings to have them I stock while he
can still find them?
On Jun 22, 2017 10:13 AM, "Anthony Royal" <skyking76t@verizon.net> wrote:
Ok Bill and to all you L29 owners that have had some trouble with your tail
trim motor not working at times. Excuse the long narrative but I think it
is important to understand what may be going on with our motors and may sav
e time looking and troubleshooting everything but the motor.I just picked u
p my tail trim motor and what he found might be a common problem with these
motors. First, the bearings were shot. They are magneto bearings and they
don't make them anymore. So, he doesn't know how long he will be able to ge
t them. Down the road they may have to convert to a standard sealed roller
bearing. He only uses top of the ling bearings.....SKF, FAG, etc.
Secondly, where the wiring harness goes just inside the motor, he found a w
ire that had the two ends butted together, as opposed to lapping over each
other and cold soldered. Definitely not an acceptable splice/connection in
any application. He said there had been arching between the wires for a ver
y long time and they finally burnt apart. He thinks this is what caused the
trim motor to be intermittent and finally fail, along with worn out bearin
gs. The safety wire with the red seals on the motor was still intact so the
wiring problem looks to be a manufacturing issue.
After the new bearings (and they are not cheap) and fixing the wire, the mo
tor runs perfectly, quiet, and drives the jack screw now as it should.
After talking with the owner, he has agreed to look at your trim motors and
see if they can be fixed. He does not work on the jack screw assy, only th
e trim motor, but send the complete assy. The only stipulation is you will
need to sign a liability release, releasing him and the business from ANY a
nd ALL liability associated with the repair of the electric motor before he
does any work. I had to sign a release when I picked up my motor. The gent
leman is very knowledgeable, thorough, and honest.=C2-
So, here is the contact info:
Owner's name is Mike Loving
Blue Ridge Servo Motor Repair, LLC1017 Tennessee St.Salem, Virginia =C2-2
4153Phone: 540-375-2990email: blueridgeservomotor@gmail.com
Hope this helps.Tony
On Monday, June 19, 2017 10:09 AM, Anthony Royal <skyking76t@verizon.ne
t> wrote:
Sorry, it didn't come across like that but that happens with emails. My ap
ologies.
I will post shortly. He's having to find the bearings. The bearings are mag
neto bearings and his normal supplier won't sell to him because it's for an
aircraft. He's going to another source.
On Monday, June 19, 2017 8:16 AM, William Geipel <l129bs@gmail.com> wro
te:
Mine was a joke, but, we really want to know where to send it.
to quote the Pres. sad!
On Jun 18, 2017, at 09:06, Anthony Royal <skyking76t@verizon.net> wrote:
I would guess there are some intelligent people out there who maybe would l
ike to know what may be causing their trim motor problem. If you don't want
to know, then don't read it!=C2- Contribute something constructive inste
ad of sarcasm.
Hey, maybe I'll trade the trim motor repair info for a few flares.....peopl
e in glass houses shouldn't throw stones.
On Sunday, June 18, 2017 9:19 AM, Anthony Royal <skyking76t@verizon.net
> wrote:
Play nice or I'll go home with my trim motor
On Saturday, June 17, 2017 7:53 PM, William Geipel <l129bs@gmail.com> w
rote:
We don=99t care how he did it. Just tell him to remember and make su
re you keep his contact info for us to ship ours.
Bill
On Jun 17, 2017, at 15:14, Anthony Royal <skyking76t@verizon.net> wrote:
I told him he might be going into a new business because trim motors seem t
o be a common problem with the L29
On Saturday, June 17, 2015994120586602274473yiv8510581628" href="mailt
o:jetblast1@me.com" target="_blank">jetblast1@me.com> wrote:
john cabrera
On Jun 17, 2017, at 6:48 AM, Anthony Royal <skyking76t@verizon.net> wrote:
The tech still has the trim motor assy as he has to get the old bearings ou
t of the housing and order new bearings (metric you know) and lubricate eve
rything with new grease. We spent about 4 hours just to troubleshoot. The m
otor has an ingenious electromagnetic brake inside so when power is interru
pted, the motor/jackscrew rotation stops and it is held in place. Interesti
ngly, before we separated the motor from the jack screw housing, turning th
e armature by hand would not retract or extend the jack screw but turning t
he adapter on the jack screw housing did extend and retract the jack screw.
So it's pretty much narrowed it down to the motor itself. Being that the m
otor would not run initially when power was applied and took some unusual e
ffort to get it started, confidence is high the bearings are the issue. Che
cking the field coils with a meter showed good. Brushes were like new. Also
, being that the trim motor worked initially for departure but nothing from
there on, pretty much pointed to the trim motor. I had cycled several time
s on the ground and got the trim moving light so the aircraft system seems
to be good.
We didn't take any photos at that time cause we didn't know what we were lo
oking for but I will ask if he can when he puts back together. Basically, s
eparate the motor from the jack screw housing. Gently pull apart and you wi
ll see the electrobrake. In the end of the motor there is an insert that co
uples the motor to the brake. Remove it by pulling straight out to see the
front bearing. When we got the motor running, not at full rpm, you could se
e the ball bearings and some were turning at a different speed or not at al
l and you could see the armature just barely wobbling. There's only about 0
.020" clearance between the armature and field coils. You could hearing the
grinding of the bad bearings or possibly the armature hitting and feel the
vibration in the motor itself. The grease being 20+ years old and having n
o lubricity left, more than likely caused the bearings to fail and when pow
er was applied, allowed the armature to cock just enough to be out of align
ment with the field coil.
This is our theory but it seems to be validated by what we did but will kno
w more once we get the new bearings installed. I will post more later once
we get the new bearings installed, test the motor on the bench, and test in
the plane.=C2-Tony
On Saturday, June 17, 2017 3:24 AM, Hartley Postlethwaite <hap1995@yaho
o.com> wrote:
Do you have any good pictures?=C2- This could be a good small comment to
put in the next Red Alert.=C2- Deadline is the end of this month for subm
issions.
Feel free to send me a PM.
Postal
FlyingHartley@gmail.com
http://www.matronics.com/ Navigsp; =C2- =C2- =C2- =C2- =C2- - MAT
RONICS WEB FORUMS -
http://forum=C2- =C2- =C2- =C2- =C2- =C2- - NEW MATRONICS LIST
WIKI -
http://wiki.matronics.com
http://www.matronics.com/c
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