---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Mon 12/31/07: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:46 AM - Re: RotaxEngines-carb sync (droadrunner) 2. 08:49 AM - Re: Re: RotaxEngines-carb sync (Guy Buchanan) 3. 08:56 AM - Re: Engine Vibration (Roger Lee) 4. 01:22 PM - Re: Re: RotaxEngines-carb sync (CHESTERMAN FARM EQUIPMENT INC) 5. 04:33 PM - Re: Re: RotaxEngines-carb sync (ElleryWeld@aol.com) 6. 04:42 PM - Re: Re: Engine Vibration (Hugh) ________________________________ Message 1 _____________________________________ Time: 06:46:51 AM PST US From: droadrunner Subject: RotaxEngines-List: Re: RotaxEngines-carb sync I am new to Rotax, having recently left Lycoming in a Cheorkee. I just bought a CGS Hawk with a 582. I realize that this discussion has been about the 912, but am wondering if it is applicable to the 582 as well. With the location of the prop, how do you do anything on these engines with it running? On mine, I would not stand between the wing and the prop. Should I remove the prop to adjust/calibrate the carbs? Thanks, Marlin-droadrunner Looking for last minute shopping deals? ________________________________ Message 2 _____________________________________ Time: 08:49:09 AM PST US From: Guy Buchanan Subject: Re: RotaxEngines-List: Re: RotaxEngines-carb sync At 06:46 AM 12/31/2007, you wrote: >Should >I remove the prop to adjust/calibrate the carbs? Marlin, I am told it is very dangerous to run the 582 without some kind of flywheel, as it will overspeed quite easily. Most adjust the carbs on the 582 mechanically, and don't balance volumetrically. I don't know if it's just laziness or if anyone has proven balancing unnecessary, but I've never heard of anyone making the effort like they do on the 912. Guy Buchanan San Diego, CA K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar. ________________________________ Message 3 _____________________________________ Time: 08:56:33 AM PST US Subject: RotaxEngines-List: Re: Engine Vibration From: "Roger Lee" Hi Guys, If you have never balanced your prop it should be done. It should be statically balanced first. This means off the plane with the hub and all. Then you should make sure it is tracking properly. This means each blade is turning in the same plane while rotating. Last, but the most important every prop on a plane should be dynamically balanced. This means using an instrument to check the vibration against its weight and balance while it is running at its cruise rpm. You should also check the blades to make sure they are the exact same pitch with a prop protractor. When I got my Flight Design CT I put a Warp drive on it. When it was dynamically balanced it was .33" out. That's a lot. Weight was added to one side and now it's only .01 out. Huge difference. The .33" out of balance was not felt in the stick. If you can feel a prop out of balance through the stick then it is way out. This is hard on many different parts of your engine and even the mounts. If you have never statically and dynamically balanced your prop that would be a priority if it were me. The longer a system runs out of balance to bigger the toll later. -------- Roger Lee Tucson, Az. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=155192#155192 ________________________________ Message 4 _____________________________________ Time: 01:22:17 PM PST US From: "CHESTERMAN FARM EQUIPMENT INC" Subject: Re: RotaxEngines-List: Re: RotaxEngines-carb sync you will get fine results from setting the carbs with the engine stopped. stop engine---remove the airfilter, apply throttle until the front edge of the slide is just flush with the bore. adjust your cables on top of carb until both slides are flush the same amount. tighten the cable and recheck, now go full throttle and make sure the back edge of the slide clears the bore. if not you need tighter cables and readjust again. now that the carbs are set the same at part throttle you need to adjust the idle stop screws so both slides begin moving at the same time when going from idle to part throttle. adjust the side that moves first by turning in the screw. when both slides start the move at exactly the same time you are done. put on filter and start engine to check for proper idle rpm. thats about it. go flying dave chesterman 701-582 with way too much experiance with 2 strokes ----- Original Message ----- From: "droadrunner" Sent: Monday, December 31, 2007 9:46 AM Subject: RotaxEngines-List: Re: RotaxEngines-carb sync > > > I am new to Rotax, having recently left Lycoming in a > Cheorkee. I just bought a CGS Hawk with a 582. I > realize that this discussion has been about the 912, > but am wondering if it is applicable to the 582 as > well. With the location of the prop, how do you do > anything on these engines with it running? On mine, I > would not stand between the wing and the prop. Should > I remove the prop to adjust/calibrate the carbs? > Thanks, > Marlin-droadrunner > > > Looking for last minute shopping deals? > > > ________________________________ Message 5 _____________________________________ Time: 04:33:43 PM PST US From: ElleryWeld@aol.com Subject: Re: RotaxEngines-List: Re: RotaxEngines-carb sync it can be a pain in the butt it takes much longer to work on planes of that configuation but I would sync the carbs believe me it will be better for the engine in the long run and you will have peice of mind knowing that it is well taken care of I have done it to Kolbs Tbirds and others I dont like doing them but its what keeps you up in the air Just my personal Thoughts Ellery In Maine do not archive (http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004) ________________________________ Message 6 _____________________________________ Time: 04:42:18 PM PST US From: "Hugh" Subject: RE: RotaxEngines-List: Re: Engine Vibration Roger: Tracking and setting the pitch on my three blade prop assembly is not a real problem. I do this on my plane with the plane level and in the hanger. However, do you have any good ideas on how to set up a three blade WoodComp prop, Klassic 160/3/R (hub and bolts) for static balance? Seems to me one would need a mating flange to bolt the prop/hub assembly to. This assembly would then need to be concentrically bolted to a shaft that is in a bearing assembly that allows free rotation of the entire setup. Then, how does one statically balance a three blade prop? The other question is, how on earth does one dynamically balance such a prop assembly (three blade) while running at cruise speed?? Kind of hard to do in the air!! The WoodComp manual that came with the three blades states " each propeller (blades and hub) was factory assembled from blades with the same weight and center of gravity, then carefully balanced. Make sure you insert each blade into the appropriate opening in the center hub, blades and openings are numbered and MUST NOT be mixed under any circumstances!" No clarifying statement as to whether this is a static or dynamic balance. I suspect it is a static balance, but I don't really know. If this is not sufficient, again I ask, how does one ordinary LSA pilot dynamically balance such an assembly?? Hugh McKay Allegro 2000 Rotax 912UL N661WW -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee Sent: Monday, December 31, 2007 11:56 AM Subject: RotaxEngines-List: Re: Engine Vibration Hi Guys, If you have never balanced your prop it should be done. It should be statically balanced first. This means off the plane with the hub and all. Then you should make sure it is tracking properly. This means each blade is turning in the same plane while rotating. Last, but the most important every prop on a plane should be dynamically balanced. This means using an instrument to check the vibration against its weight and balance while it is running at its cruise rpm. You should also check the blades to make sure they are the exact same pitch with a prop protractor. When I got my Flight Design CT I put a Warp drive on it. When it was dynamically balanced it was .33" out. That's a lot. Weight was added to one side and now it's only .01 out. Huge difference. The .33" out of balance was not felt in the stick. If you can feel a prop out of balance through the stick then it is way out. This is hard on many different parts of your engine and even the mounts. If you have never statically and dynamically balanced your prop that would be a priority if it were me. The longer a system runs out of balance to bigger the toll later. -------- Roger Lee Tucson, Az. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=155192#155192 ------------------------------------------------------------------------------------- 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.