---------------------------------------------------------- L29-List Digest Archive --- Total Messages Posted Fri 06/16/17: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:41 PM - Stabilator Trim Motor (Anthony Royal) 2. 03:16 PM - Re: Stabilator Trim Motor (William Geipel) ________________________________ Message 1 _____________________________________ Time: 02:41:20 PM PST US From: Anthony Royal Subject: L29-List: 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 _____________________________________ Time: 03:16:50 PM PST US From: William Geipel Subject: Re: L29-List: Stabilator Trim Motor did he fix it? > On Jun 16, 2017, at 15:35, Anthony Royal 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message l29-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/L29-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/l29-list Browse Digests http://www.matronics.com/digest/l29-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.