---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Tue 06/07/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:21 AM - Re: Rotax 912ULS Prop Settings (lucien) 2. 09:00 AM - Prop adjustment (John Fasching) 3. 11:34 AM - Re: Re: urgent: 912S ignition failure (Dave A) ________________________________ Message 1 _____________________________________ Time: 06:21:11 AM PST US Subject: RotaxEngines-List: Re: Rotax 912ULS Prop Settings From: "lucien" [quote="JohnF"]I have been adjusting, then flying the RV-12 with trial and error Sensenich ground-adjustasble prop blade settings. I believe I now have the prop about where it should be. Here are the results of today's trial from KANK airport at 7525-ft msl, density altitude 9,800-ft: Take off climb at 68-mph WOT showed 5,040 rpm (climb rate 650 fpm +) Level flight at 8.870-ft msl showed 5,550 rpm Two 180-degree legs showed: IAS 110/110 TAS 129/127 GPS 142/121 Will leave things as they are and check again from time to time. Thanks, Roger for your information regarding this sort of thing. John > [b] Sounds slightly overpropped to me? I think rotax wants at least 5200 rpm when running at WOT so 5000 sounds like its lugging a bit? I too fly at a high altitude (northern new mexico, where the ground is about 7000' MSL) so I prop my 912ULS (titan tornado) for climb at about 5200 at Vx (65 to 70mph) and it unloads to about 5400 at 80mph. OTOH, my prop is gigantic, a powerfin F model, 70" 3-blade. The powerfin is notorious for having a narrow speed range, in my experience, but nothing generates better climb performance. So it'll easily hit redline in level flight when pitched for good climb. Anyway, just a thought? LS -------- LS Titan II SS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=342286#342286 ________________________________ Message 2 _____________________________________ Time: 09:00:59 AM PST US From: "John Fasching" Subject: RotaxEngines-List: Prop adjustment Yes, I agree, it may be overpitched based on other comments...I am going to unload the prop 1/10-degree at a time and follow outcomes. Will post results when seems worthwhile. ________________________________ Message 3 _____________________________________ Time: 11:34:02 AM PST US From: "Dave A" Subject: RE: RotaxEngines-List: Re: urgent: 912S ignition failure Not approved for aircraft use.... -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of hhobbit Sent: Friday, May 27, 2011 3:44 AM Subject: RotaxEngines-List: Re: urgent: 912S ignition failure At my last annual, the mechanic warned me to watch for wiring trouble due to vibration. We put extra cable ties around the module connectors to prevent relative movement. Now you guys have probably seen clear wire insulation with a colour stripe along its length. Its got to be a no brainer when it comes to preventing a hidden fracture, so come on manufacturers, adopt this suggestion wherever an internally broken wire is a hazard! At a stroke we could put an end to this worry. Is there any aftermarket supplier who could make harnesses to that specification? And any idea of the price? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=341178#341178 ------------------------------------------------------------------------------------- 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.