---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 01/02/08: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:46 AM - Re: Re: Engine Vibration (Randy Lervold) 2. 09:13 AM - Low voltage problem- new 912ULS (Les Goldner) 3. 09:35 AM - Re: Low voltage problem- new 912ULS (Gilles Thesee) 4. 02:49 PM - Re: 912ULS: Carburettor and Airbox venting lines (N601RT) ________________________________ Message 1 _____________________________________ Time: 07:46:34 AM PST US From: "Randy Lervold" Subject: Re: RotaxEngines-List: Re: Engine Vibration I'm just starting to lurk here as I consider starting a Kitfox Super Sport with a 912. In terms of prop balancing, our EAA Chapter bought one of the balancers referenced below and we make extensive use of it. This can be a great goal/project for a chapter, see the below link for details... http://www.eaa105.org/Programs/programs.htm#PropBalancing Our members LOVE this program, and reducing vibration helps extend the life of all components on the plane, especially in the FWF area. Randy Lervold www.rv-3.com www.rv-8.com ----- Original Message ----- > The Woodcomp props are statically balanced at the factory, as you suspected. Unfortunately, over time they get nicks etc. which will affect the static balance a bit. Dynamically balancing a prop/engine requires expensive equipment and competent technician. The prop/engine combination balance check is done while running. Here is a decent FAQ on the subject. > > http://www.dssmicro.com/faqs/fqprpbl.htm > > As you might expect, DSSMICRO sells this equipment for doing prop > balancing. > > I've not found any one in our area that does dynamic prop balancing and > the equipment is too expensive unless you are going into the prop > balancing business. ________________________________ Message 2 _____________________________________ Time: 09:13:34 AM PST US From: "Les Goldner" Subject: RotaxEngines-List: Low voltage problem- new 912ULS If you have experienced and solved the following problem pls let me know. My 912ULS was sitting unopened for 3-years before I installed it in my new Zenith 701 but works well. My battery is new. I followed Aeroelectric's 912 wiring diagram, which included a low voltage warning light that triggers at 12.5V (if you have a CAD program you can look the diagram at http://www.aeroelectric.com/PPS/ACAD_Architecture_Dwgs/Z16L.dwg.) When I fly the plane, the low voltage warning light comes on as soon as I turn on anything requiring more than minimal power consumption (like the strobes) and the new battery voltage is lower after I land than it was before take off. Since the battery is draining in flight, the assumption is that the 912 alternator or voltage regulator is malfunctioning. I need to know if anyone else has experienced this situation, what was done to fix it, how to isolate and fix the problem, etc. Any help would be appreciated. Regards, Les 510-549-1622 ________________________________ Message 3 _____________________________________ Time: 09:35:19 AM PST US From: Gilles Thesee Subject: Re: RotaxEngines-List: Low voltage problem- new 912ULS Les Goldner a crit : > If you have experienced and solved the following problem pls let me know. > > My 912ULS was sitting unopened for 3-years before I installed it in my > new Zenith 701 but works well. My battery is new. I followed > Aeroelectric's 912 wiring diagram, which included a low voltage > warning light that triggers at 12.5V (if you have a CAD program you > can look the diagram > at http://www.aeroelectric.com/PPS/ACAD_Architecture_Dwgs/Z16L.dwg.) > When I fly the plane, the low voltage warning light comes on as soon > as I turn on anything requiring more than minimal power consumption > (like the strobes) and the new battery voltage is lower after I land > than it was before take off. Since the battery is draining in flight, > the assumption is that the 912 alternator or voltage regulator is > malfunctioning. Les, I too have wired two planes as per Z16. What I'd do first is a thorough review of the actual wiring to check that everything is OK. There have been several occurences of forgotten connections. Then actually measure bus voltage when running. Also, you'll get more considerate opinions if you post your question on the Aeroelectric 'List. Best regards, -- Gilles http://contrails.free.fr ________________________________ Message 4 _____________________________________ Time: 02:49:32 PM PST US Subject: RotaxEngines-List: Re: 912ULS: Carburettor and Airbox venting lines From: "N601RT" Tommy, Here is a photo of one vent line going into a larger line in my plane. I drilled a small hole in the top of the larger line near the end of the original length Rotax vent line, just to be sure the vent sensed the local pressure. (Sorry for the delayed response, I've been away for the holidays.) Happy New Year Roy N601RT: 2002 CH601HDS, nose gear, Rotax 912ULS, Arplast PV-50, All electric, IFR, equipped, 895hrs Read this topic online here: http://forums.matronics.com/viewtopic.php?p=155604#155604 Attachments: http://forums.matronics.com//files/912_carb_vent_41_939.jpg ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.