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  #11  
Old 02-20-2010, 02:48 AM
gasman gasman is offline
 
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Location: Sonoma County
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Van's never had a flap position failure untill they came out with flap motors. And that's progress?
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  #12  
Old 02-20-2010, 07:30 AM
David-aviator David-aviator is offline
 
Join Date: Feb 2005
Location: Chesterfield, Missouri
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Quote:
Originally Posted by ao.frog View Post
... interesting!

David: can you post a couple if pics of the rebuilt motor?

Thanks.
Alf, I would love to but the hangar is very cold right now. I'd have to remove the seats and the side panels to get to it.

Let me say, it fits perfect. At least it went in just like it came out before the rebuild. The motor head is under a cover and I don't know how it is attached. The other end where the screw shaft comes out is also sealed. It just seems much better than it was.

That being said, I don't trust these things. Could be the Usher units are good from the beginning but the Motion units have been a royal pain in the butt.
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  #13  
Old 02-20-2010, 08:16 AM
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rv9av8tr rv9av8tr is offline
 
Join Date: Dec 2006
Location: Portland, OR
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Default Huh???

Quote:
Originally Posted by David-aviator View Post
They told me they did not know the motors were going to be used in an airplane and the reason they failed so frequently was they were not designed for that use.
"Not designed for that use"???? Huh???

The flap motor model number supplied by Van's (ES 85615-157-1), appears to be designed to handle 100 lbs of load, per the supplier. http://www.motionsystem.com

Based on the fulcrum advantage of the flap arm (130%), I can't possibly imagine the air loads generating that much force on the motor. It can't matter if it's in an airplane, a car, or a basement toy. The only "design" issue is, what IS the actual air load on the motor.

I am puzzled though, how is it this "same" motor shown at motionsystems has a long black rod sticking out of it, but our motors don't have that? Something seems amiss?? And why do this flap motor failures seem to keep happening? Sounds like a MOTOR design problem to me...........
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  #14  
Old 02-20-2010, 08:44 AM
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L.Adamson L.Adamson is offline
 
Join Date: Apr 2005
Location: KSLC
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Quote:
I am puzzled though, how is it this "same" motor shown at motionsystems has a long black rod sticking out of it, but our motors don't have that? Something seems amiss?? And why do this flap motor failures seem to keep happening? Sounds like a MOTOR design problem to me...........
My 1998 Motion Systems motor looks the same as in the pic. The moving part of the telescoping unit is black.

Recently, I took mine apart. There was an "exploded view" picture of all the parts on the net. Might even have been linked from here. I just googled for it.

While others had too much grease that worked it's way to the brushes, mine was a case of the wires that came out of the housing being pressed at a hard 90 degrees (from my installation). The insulation frayed, and one wire got to the point of intermittent operation.

The fix wasn't too tough. You remove the housing and end up with the wires & brush wires being pressed into a small hole with a pin. I found the pin somewhat difficult to press back in, so I just soldered them together, and re-routed the wires through the slots that hold them. There's a few tricks to keeping the spring loaded brushes in place, while you insert them around the motor armature, but it's not difficult either.

All in all, the unit is simple and fairly robust in construction. It works just fine now.

L.Adamson --- RV6A
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  #15  
Old 05-29-2010, 01:24 PM
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bhester bhester is offline
 
Join Date: Jan 2005
Location: Hopkinsville, KY
Posts: 957
Unhappy

Quote:
Originally Posted by Bill Riggs View Post
I had the same problem as you are having, bought the same motor as you and could not get the gear off of my old motor. I talked to Usher Precison about it and was told I was not going to be able to get the gear off without damaging it. Usher will sell you a new motor with the gear attached, that is what I did no problems since. As I remember they are about 100.00 from Usher.

Bill

http://www.usherprecision.com/
Bill have you had any problems with you new motor? I need another one I've cleaned mine about 4 times now.
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  #16  
Old 11-16-2010, 03:49 PM
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Rodoc Rodoc is offline
 
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Location: San Diego, CA
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When I first started flying mine used to quit ever 10-20 hours. Someone told me to spray gobs of contact cleaner in, and try it again. This worked every time and became more and more effective. Last time it quit was 5 years ago.
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  #17  
Old 11-17-2010, 06:28 AM
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John Myers John Myers is offline
 
Join Date: Feb 2006
Location: Newalla, OK
Posts: 24
Default Brush assembly for flap motor

I found a brush assembly from Click Automation that fits the motor.
Their part number was 862754 If I remember correctly it was about $14 and the shipping was $21 so I ordered two, one for new set and one for a spare in the tool bag. The major difference in the "brush", as they call it, is that it doesn't have wires to the brushes and little springs pushing the brushes as they are silver soldered to some leaf type tension springs. It is much easier to remove and install on the motor.
I saw one reference by Pittman industries to a SuperBrush, but I am not sure if this in fact what they are referring to.
Now we carry the correct size allen wrench (to remove the motor from the jack shaft) and a spare brush. I am hoping with that insurance, that it won't fail again Their web site is http://www.clickautomation.com/ and then just search for the part number 862754.
I installed the new brush about 50 airframe hours ago with no problems yet.

Good luck.
John Myers RV8 N851JM
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  #18  
Old 04-06-2017, 09:56 AM
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bobair43 bobair43 is offline
 
Join Date: Dec 2007
Location: Beverly NJ
Posts: 17
Default flap motor worm gear

Just had a friend show me his failed flap mechanism. The worm gear was completely wiped out. we both finished our planes at the same time his with less flying time than mine.
He ended up buying the whole flap mechanism. Any thoughts on this?
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