---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 04/25/12: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:51 AM - Re: Re: 912ULS starts missing at cruise power (Max Cointe) 2. 04:38 AM - Re: 912ULS starts missing at cruise power (Thom Riddle) 3. 07:42 AM - Re: 912ULS starts missing at cruise power (bjones@dmv.com) ________________________________ Message 1 _____________________________________ Time: 12:51:22 AM PST US From: "Max Cointe" Subject: RE: RotaxEngines-List: Re: 912ULS starts missing at cruise power Hi There All, MoGas with 10% ethanol... I won't use that type of fuel because of chemical impact on gaskets and filters and plastics and (I heard) vapor condensation possibility which to me looks like the problem you had. And at the end of the day the difference in price with non ethanol MoGas is about 0.05 per liter or 1 per hour of flight. Cheers, Max Cointe Europa F-PMLH TriGear Kit #560 912ULS Airmaster 420 hours mcointe@free.fr -----Message d'origine----- De : owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] De la part de Jason Omelchuck Envoy : mercredi 25 avril 2012 00:14 : rotaxengines-list@matronics.com Objet : RotaxEngines-List: Re: 912ULS starts missing at cruise power Hello, Yes, I know it was not a standard lapse rate day, we had record heat here in Portland and there must been some cold air flowing over the top. I have flow at 9500 feet on mo gas on some warm days and never had a problem. But it could be vapor pressure issues. Why would that change with throttle setting? Rotax engines have no mixture control. I am going to check the float bows for water as the symptoms were exactly last time I found water droplets in them. I appreciate the feedback. Jason Read this topic online here: http://forums.matronics.com/viewtopic.php?p=371733#371733 ________________________________ Message 2 _____________________________________ Time: 04:38:02 AM PST US Subject: RotaxEngines-List: Re: 912ULS starts missing at cruise power From: "Thom Riddle" It might have been carb ice. -------- Thom Riddle Buffalo, NY (9G0) Kolb Slingshot SS-021 Jabiru 2200A #1574 Tennessee Prop 64x32 Truth is what stands the test of experience. - Albert Einstein Read this topic online here: http://forums.matronics.com/viewtopic.php?p=371766#371766 ________________________________ Message 3 _____________________________________ Time: 07:42:54 AM PST US Subject: Re: RotaxEngines-List: 912ULS starts missing at cruise power From: bjones@dmv.com Someone with technical expertise might offer comments on the risk of phase seperation of ethanol and water from mo gas with a big decrease in temp at altitude. When I have experienced phase seperation, the full ten percent (roughly) of the fuel that is ethanol & water settled to the bottom of the tanks and the engines would not run on the settleout. So the idea of a little bit of settleout does not fit my experience. Love to hear from someone in the fuel science industry. My prevetive measure is to use ethanol free auto gas from marina's and by checking puregas.com when traveling to find gas stations with ethanol free gas. BJ Kitfox IV 912 old fiberglass tanks so can not use gasahol > > > I though I might throw this out for the group to ponder. I was out flying > yesterday and I had just leveled off at 8500 feet when the engine started > to miss. I reduced power (to 5000) and the miss went away. Increase > power again and it was back. I pulled the power back and went the long > safe way around the mountains instead of over as I had intended. When I > got closer to home, I could run the engine at extended high power and no > miss. The miss is just like when I discovered some water in the float > bowls. My theory is that when I climbed to 8500ft, the temperature was a > full 40 degrees less than when I took off and that caused water to > condense out of the fuel. When I got close to home, the temperature was > 80 degrees and the water went back in solution and the problem went away. > I am using premium mo gas with 10 percent ethanol. > > Jason > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=371723#371723 > > ------------------------------------------------------------------------------------- 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.