---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Wed 07/08/09: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:19 PM - Re: Re: Oil Burn (Bob Haas) ________________________________ Message 1 _____________________________________ Time: 01:19:00 PM PST US From: "Bob Haas" Subject: RE: JabiruEngine-List: Re: Oil Burn Vent the oil separator back to the sump via a three way fitting at the sump drain. No spots on my hanger floor at 333.8 Hobbs time. Bob Haas N380BH. -----Original Message----- From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of dons701 Sent: Monday, July 06, 2009 10:58 AM Subject: JabiruEngine-List: Re: Oil Burn While I am new to the 2200A I have worked with many other types of piston engines, racing and others. The 2200A is interesting in that there seems to be no real control of oil mist and crankcase pressure, i.e. collective combustion leakage past the rings normally found in all running piston engines. I have not removed the oil pan but, according to the engine parts manuals there is no crank scraper or windage tray as found in many race engines to control the oil mist wrapped around a spinning crankshaft. This crankcase pressure with mist and oil splatter obviously makes it's way out of the engine by using the dipstick tube / oil vent hose. A system that reduces or eliminates any liquid oil from making it's way out of the engine, allowing only "dry" normal combustion pressure to be relieved, would be optimal. Separating oil from the air would need to be done in stages by mechanically removing as much oil mist as possible from the spinning crank as said earlier, with scrappers ! and or a windage tray similar to any common race engine. Even a number of circular fine mesh screens situated on the dipstick might baffle the liquid oil but still allow gasses to escape. The ultimate goal would not only be to eliminate the oil collection bottle and retain oil in the engine, but would be to create a negative pressure in the crankcase as this would increase power by making the rings seal more efficiently. Initially as time allows, i will experiment with the dipstick baffle modification and later, a way of creating crankcase vacuum utilizing exhaust velocity in the exhaust pipe and report back on this site. I know there are many creative people on this site that might have already figured out some of these issues, or have better ideas :). If I am missing something or I am not correct let me and others know, lets learn together for the benefit of all. Thanks for reading, Don Read this topic online here: http://forums.matronics.com/viewtopic.php?p=251750#251750 Checked by AVG - www.avg.com 17:54:00 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-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/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-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.