---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sun 11/04/12: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:02 AM - Re: Re: Reserve Fuel (Duncan & Ami) 2. 04:19 AM - [Spam] [Spam] Re: Fuel Return Line (Remi Guerner) 3. 08:32 AM - Re: Re: Fuel Return Line (Bud Yerly) ________________________________ Message 1 _____________________________________ Time: 02:02:19 AM PST US From: "Duncan & Ami" Subject: RE: Europa-List: Re: Reserve Fuel <<..But it worth checking that the fuel return is happening.>> Yes, that should be on the annual checklist. Alternately, if you have a fuel pressure sensor fitted the action of the return can be checked at every shut down, by watching fuel pressure return quickly back to zero. Without the return, the pressure would be locked-in to the fuel lines (unless the fuel pump valve and/or float valves leak!). Duncan McF. -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of roddyeuropa@aol.com Sent: 25 October 2012 09:55 Subject: Re: Europa-List: Re: Reserve Fuel Hi Alan I'd add a couple of things - you have the fuel drain mod installed which is good. But be aware that you need to drain more fuel than a normal fuel drain to clear the fuel in the lines between the drain and the tank. I drain about 'half jam jar' each side. Also, the fuel return from the engine should be feeding into the reserves side so it should refresh the fuel. But if fueling the plane doesn't get to the bottom of the tank to stir things up, the return flow certainly won't. But it worth checking that the fuel return is happening. Regards Roddy Kesterton G-IKRK -----Original Message----- From: Alan Carter Sent: Thu, 25 Oct 2012 8:56 Subject: Europa-List: Re: Reserve Fuel Hi Tim. NZ a beautiful county i had a holiday there. I have done my time on Chipmunks, My Europa is a Mono to Tri Conversion so maybe better! well a lot easier. The Fuel/Tables were done with the aircraft just in its level position on level ground, a couple of litres either way i am not bothering about as if i was down to 15 litres i would be quit worried. Glad you use the reserve fuel, just my choice taxing in on reserve, I like your idea of the extended lever, is it guarded or recessed, can you give some more on how to do it. Alan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=385966#385966 arget=_blank>http://www.matronics.com/Navigator?Europa-List p://forums.matronics.com blank>http://www.matronics.com/contribution ________________________________ Message 2 _____________________________________ Time: 04:19:48 AM PST US Subject: Europa-List: [Spam] [Spam] Re: Fuel Return Line From: "Remi Guerner" Alex, Varying pressure in the return line may affect the fuel pressure to the carbs, but as long as this fuel pressure stays within the limits specified by Rotax, it should not affect the mixture. Remi Read this topic online here: http://forums.matronics.com/viewtopic.php?p=386716#386716 ________________________________ Message 3 _____________________________________ Time: 08:32:51 AM PST US From: "Bud Yerly" Subject: Re: Europa-List: Re: Fuel Return Line Jim, Never had a problem with return pressure as rigged. The Rotax manual says it is supposed to be a minimum of back pressure as you indicated. If you restrict the return pressure, you actually overpressurize the fuel system. Those with gauges that read raw fuel pressure can test this easily, by just clamping the return line just slightly with the engine off and not the rapid rise in pressure. You are very wise to note that the column pressure is only about 1/2 psi. in the full tank. I cannot blow more than 1.5 PSI when checking against my fuel direct reading manual gauge. Check for kinks and plugged vents also. Off until Friday. Hope you find out what the matter is. It must be something simple, as it is hard to find. Regards Bud Yerly ----- Original Message ----- From: h&jeuropa To: europa-list@matronics.com Sent: Thursday, November 01, 2012 2:45 PM Subject: Europa-List: Re: Fuel Return Line > While trying to understand our recent 914 power problems, we talked to Rob Seaton at Rotech. He suggested we measure how much pressure is required to return the fuel to the tank (from regulator). Remove return hose from top of regulator, plug one side of banjo fitting and blow into other (don?Tt ingest fuel!). it should be very easy (max is 1.5 PSI pressure loss with both pumps on: 914 installation manual sec 14.3) We found with the fuel tank full the pressure required was more than we could easily blow. With the tank half empty not much pressure was required. Our system is per Europa with the return at the bottom of the tank. Calculations show the pressure of the column of fuel in a full tank (15 inches of fuel) is about .4 psi which is certainly less than 1.5 psi. The Europa setup has worked OK for over 400 hours, but perhaps it would be better to return the fuel to the top of the tank. Opinions? Jim & Heather N241BW Read this topic online here: http://forums.matronics.com/viewtopic.php?p=386515#386515 www.aeroelectric.com www.buildersbooks.com www.homebuilthelp.com http://www.matronics.com/contribution http://www.matronics.com/Navigator?Europa-List ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.