---------------------------------------------------------- Lightning-List Digest Archive --- Total Messages Posted Thu 04/21/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:35 AM - Re: Airflow splitter for EGTs (flylightning) 2. 10:04 AM - Jabiru Engine Class may 13-15th (flylightning) 3. 06:07 PM - 100ll vrs mogas (Tex Mantell) ________________________________ Message 1 _____________________________________ Time: 09:35:38 AM PST US From: "flylightning" Subject: RE: Lightning-List: Airflow splitter for EGTs Clive, I think you could fit it to the esqual but it would require a reversal of the SCAT at the firewall to get back to the airbox. This shouldn't cause a problem because the splitter is at the carb. The splitter is mounted like + I haven't tried it the other way. Haven't thought about it really. IT work very well in our set up and I know that we have seen uneven EGTS in the lighting. I really don't want to suggest a solution if others aren't having a problem. Nick -----Original Message----- From: owner-lightning-list-server@matronics.com [mailto:owner-lightning-list-server@matronics.com] On Behalf Of James, Clive R Sent: Wednesday, April 20, 2011 11:22 PM Subject: RE: Lightning-List: Airflow splitter for EGTs This looks interesting and thanks for sharing it. The WOT uneven running on my Esqual's 3300 went away with a smooth bend though I've never moved to the next step, chasing EGT's. I had always wondered if the place for the 'straightening device' was in a straight line to the carb. In industrial flow measurement we always have the straightening bundle after the bend in a straight line to the measuring device. The bundle is usually just that, a bundle of tubes inside the pipe, that would be the most efficient way of straightening the flow but in our case would be a little restrictive of airflow unless the tubes could be really thin (like drinking straws). Unfortunately there is no space for the fibreglass tube on the Esqual and I imagine some other engine installations, though I think something of the style of this could be fashioned in the last part of the bend.. One question, does the orientation of the cross of the splitter have any effect. + or x ? Nick, have you considered, forwarding on these results to the engine lists? jabiruengines@yahoogroups.com jabiruengine-list@matronics.com given the benefit that would likely apply to many installations. Regards, Clive _____ From: owner-lightning-list-server@matronics.com [mailto:owner-lightning-list-server@matronics.com] On Behalf Of flylightning Sent: 20 April 2011 20:06 Subject: Lightning-List: Airflow splitter for EGTs Group, For some time now Bill Browns from IL has been playing with intake splitters to even out the large Difference in EGTS from left to right bank. One of the last designs, a four way splitter, was purposed to go in the outlet tube of the Airbox to the carb. I know that Bill and a few others have testing it there with ok results. A little back story here. From day one we have always attached the SCAT hose directly to the Carb in a Lightning. The Jabiru manual says to have a clean bore tube attached to the carb than the scat hose. For one reason or another I paid no attention to this and didn't do it. Was as of late, say the last 6 planes or so out of SYI I have installed a smooth bore fiberglass tube to the carb. It does make installing the SCAT easier but did nothing for my EGTS, bummer. So I thought well why not stick the Splitter in the tube right in front of the CARB, it can't get any worse, and the air certainly can't tumble after it no room. So a test flight with out The splitter installed and just the fiberglass tube revealed EGTs as follows at WOT. Lowest was 1050 degrees and the highest was near 1400 degrees. Yep that is what we see with out the tube. Back on the ground and insert the Splitter. WOW what a difference, low EGTs now 1180 degrees and the high was 1240 degrees at WOT!!! Never seen that. Full power in level flight showed the same results. Cruise was also much better. So this is just chance right one install, cant be the same on the next plane right? Note the 2 pictures, One shows the 4 way splitter insert, and a Splitter built in to a aluminum tube. The second picture is where the smooth bore tube attaches, in this case a fiberglass tube for the insert. The splitter built in to the tube is intended to be a production style finished part with no insert. So I stuck this on the newest LS-1 we are flying. Same idea just looks better. WOW again, same results. WOT EGT low 1140 degrees, High EGT was 1220 Degrees. The rest of course in the middle. The spread was great just a little rich, so swap out the 255 main jet to a 250 main jet with better leaner temps. With the 250 main jet we see 1220 LOW egt and 1280 High EGT at full power WOT. That's outstanding in my book. So with two plane flying with identical results I think we are on to solving the uneven fuel distribution and full throttle. I have sent a few more of these out to other dealers and Lighting builders to play with ( umm test) and see what happens. We just have to find some one to build them for us, unless Bill wants to mass produce them in his basement! Nick ________________________________ Message 2 _____________________________________ Time: 10:04:00 AM PST US From: "flylightning" Subject: Lightning-List: Jabiru Engine Class may 13-15th The May engine class given 13-15th still has available slots. Mark and Yours truly are the teachers and would love to see you there. Go to www.usjabiru.com and click on the link for the seminar at the bottom of the home page. Fill out the attendance sheet and come on down to TN. Thank you, Nick Otterback Arion Aircraft ________________________________ Message 3 _____________________________________ Time: 06:07:36 PM PST US From: "Tex Mantell" Subject: Lightning-List: 100ll vrs mogas I now have over 100 hrs on the lightning and its all on 93 oct car gas. Everything is next to perfect and runs great. It took a while to get the proper jetting. Now I have to switch to 100 LL and don't know what to expect. The last few tanks of fuel have been 100LL and It seems to run even better. Its hard to tell anything with the outside temps have been 35 degrees or lower. Has anyone made the change and what did you experience? Any comments would be appreciated. Tex ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message lightning-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Lightning-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/lightning-list Browse Digests http://www.matronics.com/digest/lightning-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.