---------------------------------------------------------- RV8-List Digest Archive --- Total Messages Posted Fri 10/16/09: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:23 PM - Re: Re: Flap motor - failure, prevention and request (Chris Welsh) ________________________________ Message 1 _____________________________________ Time: 01:23:18 PM PST US From: Chris Welsh Subject: Re: RV8-List: Re: Flap motor - failure, prevention and request When I was installing the flap actuator, I could not get the bolts on the nylon bushing tight without the actuator binding. I ended up reaming the holes in the nylon blocks out to 5/16 and making some bushings. I also capped the top of the blocks with a piece of .06 aluminum. This allowed me to torque the bolts properly with no binding of the actuator. I have no idea if this will help the longevity of the flap motor, but it can't hurt. The motor was noticeably quieter with no binding as would be expected. The other thing I did was add two zener diodes back to back at the motor connector hoping to alleviate voltage spikes and arcing of the motor brushes. Again, no data yet as to whether or not this increases motor longevity but again it can't hurt. Chris Welsh ________________________________ From: "Speedy11@aol.com" Sent: Thursday, October 15, 2009 3:15:30 PM Subject: RV8-List: Re: Flap motor - failure, prevention and request Vince, I've heard of a lot of RV-8 flap motor failures, but never has anyone (that I'm aware of) investigated the reason for them - and certainly none have discovered the wiring problems you spoke of. I am just reaching 20 hours on my RV-8A and I'm going to take your advice and strengthen the wiring. I took care to secure the flimsy wires when building, but I'm going to address the issue again. Thanks for reporting your info. Stan Sutterfield Twenty > hours on my RV-8 and the flap motor went south. Inspection reveals t >he > wire insulation right where the wires enter the motor housing opened up > >(both wires) and shorted then broke. I suspect a lot of the intermittent > op >eratio problems posted on the list are due to the wires internally > breaking >. The cleaning and reinstallation may temporarily cause the wires > to reconn >ect thus masking the real problem. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv8-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV8-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/rv8-list Browse Digests http://www.matronics.com/digest/rv8-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.