---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Fri 05/31/13: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:09 PM - Re: Re: Airmaster AC200 Feather light on during flight (Bud Yerly) ________________________________ Message 1 _____________________________________ Time: 03:09:12 PM PST US From: "Bud Yerly" Subject: Re: Europa-List: Re: Airmaster AC200 Feather light on during flight Gordon, Sorry to here of your lost time with the Airmaster. Please note that when inspecting the brushes, it has come to my attention that the braded copper wire has to be twisted nearly to the point of making a curl. Once nice and tightly wound, it stays inside the spring and is trouble free. If the braded copper is not wound tightly, it tends to bend under spring compression and get caught in the spring, partially jamming the brush. Normally this is fairly close to brush replacement time. Should the copper lead get caught in the spring wire gaps, this makes the brush hang up and eventually loose contact as it wears. I have even seen one where the spring cut the braded copper. Either way the prop control stops working properly shortly thereafter until the brush is changed. I have never had problems with carbon dust in the brush guide, but that too has been a reason for sticky brushes. I'm afraid I have seen the wire jam up the works twice now and it really has nothing to do with your operations. The Airmaster manual is clear on how to wind the copper braid, but I am afraid, we don't all wind the copper the same. On annual inspections I tend to take my brush block off and check my brushes carefully. Any sticking and I am into it, cleaning and inspecting. But I am anal like that. Best Regards, Bud Yerly US Airmaster Distributor. ----- Original Message ----- From: GBWFH2010 To: europa-list@matronics.com Sent: Wednesday, May 29, 2013 12:37 PM Subject: Europa-List: Re: Airmaster AC200 Feather light on during flight > I think I have solved the problem. Despite having removed the brushes and cleaned the slip ring once, I decided to do the whole operation again. What I found was the inner ring brush had a very sticky spring and was sometimes getting stuck at the mid-way point, thus making intermittent contact with the ring. (When I removed the brushes the first time everything appeared fine so I missed the problem.) It is possible the vibration caused by the landing run and stopping the engine might have been enough to cause the brush to contact the inner ring as all ground feathering tests were fine. A short test flight showed the propeller and all light indications to be functioning perfectly with not a hint of the FEATHER light illuminating! -------- Gordon Grant G-BWFH Read this topic online here: http://forums.matronics.com/viewtopic.php?p=401522#401522 http://www.matronics.com/Navigator?Europa-List http://www.matronics.com/contribution ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.