Today's Message Index:
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1. 02:41 PM - Stabilator Trim Motor (Anthony Royal)
2. 03:16 PM - Re: Stabilator Trim Motor (William Geipel)
Message 1
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| Subject: | Stabilator Trim Motor |
Hey Everyone,There had been some previous discussions with regards to the t
ail not trimming or sticking. I've had this problem since I bought my plane
. Initially it was maybe once a year but over the last 7 years it has gotte
n to be more frequent. I recommended (tried) spraying electronics cleaner d
own the side of the flaps buttons. After opening the flap box it is obvious
that is useless. I looked at the flap switches in the left wing. Nothing t
here. Tried changing out the front flap box. No joy. Tried putting the flap
s down with the rear cockpit flap box and the same as the front.....lowers
flaps and that was it. =C2-I flew this past weekend and the tail trimmed
to 30 degrees and stayed there. Glad it stuck in the landing configuration!
I removed the trim motor and took it to a servo/electric motor repair shop.
When hooked to a power source and after we figured out the correct pins, w
e applied power..... nothing but a slight grinding sound and the motor got
hot after only a few seconds. Armature never turned with power but free whe
eled without power. To make a long story short, the armature roller bearing
s were worn out and when power was applied, the armature cocked and made co
ntact with one of the field coils. We found this when we applied power and
pushed on one end of the armature aft of the brushes and it started spinnin
g. Looking at the front bearing you could see the roller balls barely movin
g and the play. The grease was old and dried out and probably caused the be
aring failure. The tech is 99% sure the bearings are the problem. Brushes w
ere like new and armature looked great.
So, if you guys who are experiencing a stabilator trim or not moving when i
t should or sticking, you may want to remove the motor and have it looked a
t. The Tech also checked the 4 microswitches in the square box that's attac
hed to the motor assy and they were good. These switches tell the tail wher
e to stop.....0, 15, and 30 degree positions.
Tony
Message 2
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| Subject: | Re: Stabilator Trim Motor |
did he fix it?
> On Jun 16, 2017, at 15:35, Anthony Royal <skyking76t@verizon.net>
wrote:
>
> Hey Everyone,
> There had been some previous discussions with regards to the tail not
trimming or sticking. I've had this problem since I bought my plane.
Initially it was maybe once a year but over the last 7 years it has
gotten to be more frequent. I recommended (tried) spraying electronics
cleaner down the side of the flaps buttons. After opening the flap box
it is obvious that is useless. I looked at the flap switches in the left
wing. Nothing there. Tried changing out the front flap box. No joy.
Tried putting the flaps down with the rear cockpit flap box and the same
as the front.....lowers flaps and that was it.
> I flew this past weekend and the tail trimmed to 30 degrees and stayed
there. Glad it stuck in the landing configuration!
> I removed the trim motor and took it to a servo/electric motor repair
shop. When hooked to a power source and after we figured out the correct
pins, we applied power..... nothing but a slight grinding sound and the
motor got hot after only a few seconds. Armature never turned with power
but free wheeled without power. To make a long story short, the armature
roller bearings were worn out and when power was applied, the armature
cocked and made contact with one of the field coils. We found this when
we applied power and pushed on one end of the armature aft of the
brushes and it started spinning. Looking at the front bearing you could
see the roller balls barely moving and the play. The grease was old and
dried out and probably caused the bearing failure. The tech is 99% sure
the bearings are the problem. Brushes were like new and armature looked
great.
>
> So, if you guys who are experiencing a stabilator trim or not moving
when it should or sticking, you may want to remove the motor and have it
looked at. The Tech also checked the 4 microswitches in the square box
that's attached to the motor assy and they were good. These switches
tell the tail where to stop.....0, 15, and 30 degree positions.
>
> Tony
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