---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Fri 11/02/12: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:30 AM - Re: Re: Fuel Return Line (klinefelter.kevin@gmail.com) 2. 06:29 AM - Re: 912iS paper (Christoph Both) 3. 07:05 AM - Re: [Spam] Re: Re: Fuel Return Line (Alex Kaarsberg) ________________________________ Message 1 _____________________________________ Time: 03:30:50 AM PST US From: klinefelter.kevin@gmail.com Subject: Re: Europa-List: Re: Fuel Return Line Jim, I have my 914 fuel return set up as Graham describes, and no problems. I hav e never checked the return line pressure. What problem are you experiencing? Kevin On Nov 1, 2012, at 8:32 PM, GRAHAM SINGLETON wrote: > Jim > I have always put the fuel return into the top of the tank, (I used a rede signed tank fitting that incorporated the breather connection (3/8 aluminum) > fuel return and sight gauge return connection. Much less back pressure at t he top of the tank and the (maybe hot from the engine driven pump) > then mixes with the main bulk of the tank contents before going baCK TO TH E ENGINE. sorry kaps lok again! > Graham > > From: "h&jeuropa" > To: europa-list@matronics.com > Sent: Thursday, 1 November 2012, 19:45 > 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 t o the tank (from regulator). Remove return hose from top of regulator, plug o ne side of banjo fitting and blow into other (don=C3=A2=82=AC=84=A2t i ngest 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 co uld easily blow. With the tank half empty not much pressure was required. O ur system is per Europa with the return at the bottom of the tank. Calculat ions show the pressure of the column of fuel in a full tank (15 inches of fu el) 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.matronicsease Support ref="http://www.matronics.com/contri bution">http://www.matronics.com/contbsp; -Matt Dralle, List Adm in. --> http://www.matronics.com/Navigator?Europa-Listhttp://forums.matronic s.com > _============= > > > > > > ________________________________ Message 2 _____________________________________ Time: 06:29:01 AM PST US From: Christoph Both Subject: Re: Europa-List: 912iS paper Any one out there having obtained the paper and willing to share it with th e EUROPA group? Christoph Both Wolfville Nova Scotia Canada EUROPA #223 From: Jan de Jong > ropa-list@matronics.com> ist@matronics.com> Subject: Europa-List: 912iS paper (copied from RotaxEngines list) Those interested in the design of the 912iS may want to buy SAE paper nr 20 12-32-0049. By 3 Rotax engineers and recently presented at an SAE conference. It costs $23 and can only be printed, during 24 hours, not saved. Some of the figures need to be printed separately to make some very small p rint readable (primitive but working procedure: zoom to maximise on screen, copy screen to clipboard, paste into picture viewer like Irfanview, crop i n picture viewer and print/save). I found it interesting. A lot of questions were answered, quite a view rema in. Jan de Jong rsbooks.com> m> ________________________________ Message 3 _____________________________________ Time: 07:05:17 AM PST US Subject: Re: [Spam] Re: Europa-List: Re: Fuel Return Line From: Alex Kaarsberg I would expect return pressure to depend on the height to which it is pushed , ie the height of the surface or opening. Exit to top of tank will provide equal (in average higher) back pressure tha n if return is at the bottom, all other parameters being equal... Alex, kit 529 Enviado via iPhone Em 01/11/2012, =C3-s 23:32, GRAHAM SINGLETON escreveu: > Jim > I have always put the fuel return into the top of the tank, (I used a rede signed tank fitting that incorporated the breather connection (3/8 aluminum) > fuel return and sight gauge return connection. Much less back pressure at t he top of the tank and the (maybe hot from the engine driven pump) > then mixes with the main bulk of the tank contents before going baCK TO TH E ENGINE. sorry kaps lok again! > Graham > > From: "h&jeuropa" > To: europa-list@matronics.com > Sent: Thursday, 1 November 2012, 19:45 > 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 t o the tank (from regulator). Remove return hose from top of regulator, plug o ne side of banjo fitting and blow into other (don=C3=A2=82=AC=84=A2t i ngest fuel!). it should be very easy (max is 1.5 PSI pressure loss with bot h pumps on: 914 installation manual sec 14.3) > > We found with the fuel tank full the pressure required was more than we co uld easily blow. With the tank half empty not much pressure was required. O ur system is per Europa with the return at the bottom of the tank. Calculat ions show the pressure of the column of fuel in a full tank (15 inches of fu el) 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.matronicsease Support ref="http://www.matronics.com/contri bution">http://www.matronics.com/contbsp; -Matt Dralle, List Adm in. --> http://www.matronics.com/Navigator?Europa-Listhttp://forums.matronic s.com > _============= > > > > > > ------------------------------------------------------------------------------------- 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.