---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Fri 06/29/07: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:03 AM - Re: egt temp (Noel Loveys) 2. 11:40 AM - Re: Re: RotaxEngines-List Digest: 4 Msgs - 06/25/07 (Gilles Thesee) ________________________________ Message 1 _____________________________________ Time: 10:03:10 AM PST US From: "Noel Loveys" Subject: RotaxEngines-List: Re: egt temp 100 % in agreement Noel > Time: 03:55:22 AM PST US > From: Thom Riddle > Subject: Re: RotaxEngines-List: egt temp > > > Noel, > > When you used the term "backfire" I mistakingly thought you were > referring to the explosion in the exhaust system phenomenon, which is > what many (maybe most) people erroneously call "backfiring" when in > truth that is an "afterfire". Afterfiring being generally caused by > unburned fuel (from overly rich condition) in the exhaust system > hitting a hot spot and exploding. With your further explanation I now > know you were speaking of firing back through the intake > system, which > indeed can be caused by lean condition among others. Thanks for the > clarification. > > You are also correct when you state that when the fuel level in the > float bowl is low that would cause a lean condition, whether it is > caused by the fuel supply being exhausted or the float level > is set too > low. > > I'm well acquainted with the rich of peak and lean of peak situations > and in general, especially with engines that are not fuel injected or > in which instrumentation does not include EGT for every > cylinder, your > recommendation to run a bit rich of peak EGT is a good one. > However, in > a system with manual mixture control, as long as I'm running > at normal > cruise power or less, I generally lean very slowly until the > slightest > roughness begins to be noticed and then enrichen mixture until smooth > again. As long as the fuel is of the proper octane and > everything else > is normal in the engine, this will yield best fuel economy without > risking the engine in any way. Unfortunately, we don't have a manual > mixture control on our 912UL. > > Thom in Buffalo ________________________________ Message 2 _____________________________________ Time: 11:40:52 AM PST US From: Gilles Thesee Subject: Re: RotaxEngines-List: RE: RotaxEngines-List Digest: 4 Msgs - 06/25/07 Noel Loveys a crit : > P51s were built to be used in the European theatre with Rolls-Royce engines. > That could be the reason for the Celsius gauges. > Noel, P-51 crews were mainly from the the US, Britain and its "colonies", the only nations in the world using Fahrenheit. After the war, they forgot about their good dispositions...Funny. Best regards, -- Gilles http://contrails.free.fr ------------------------------------------------------------------------------------- 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.