---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Thu 04/05/18: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:11 AM - =?utf-8?Q?Re:__Sun_'n_Fun_2018? () 2. 09:25 AM - Rotax 914 Electric fuel pumps (William Daniell) 3. 03:45 PM - For all those long wing'd europas (Pete) 4. 05:33 PM - Re: Rotax 914 Electric fuel pumps (Mike Gregory) ________________________________ Message 1 _____________________________________ Time: 12:11:08 AM PST US From: Subject: =?utf-8?Q?Re:_Europa-List:_Sun_'n_Fun_2018? 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I get the logic of a direct connection to the alternator. Why isn't the other pump connected direct to the battery so that if the alternator fails you can switch off the buss run one pump off the battery? (My EFIS has a back up battery and I carry a hand held so I can operate with the buss off.) thanks Will William Daniell LONGPORT +57 310 295 0744 ________________________________ Message 3 _____________________________________ Time: 03:45:48 PM PST US Subject: Europa-List: For all those long wing'd europas From: Pete ...a neat podcast. Crazy high true airpeeds, and chatter about flutter :) http://inspire.eaa.org/2018/04/04/eaas-the-green-dot-jim-payne/ ________________________________ Message 4 _____________________________________ Time: 05:33:00 PM PST US From: "Mike Gregory" Subject: RE: Europa-List: Rotax 914 Electric fuel pumps Hello Will, You could connect the second fuel pump direct to the battery, via a fuse/CB and switch as for the trim circuit, but why would you wish to? In the event of alternator failure, unless you have a low-capacity main battery, you have plenty of time to shed loads according to how long you need to keep airborne. In the event of a forced landing and turning off the main bus with the master switch, the electric trim is kept operational to avoid heavy stick forces, but this logic does not apply to the fuel pump. If the engine has stopped and you are making a forced landing, a single action to turn off the master switch before contact with the ground will kill all electrics (except the trim and your built-in standby batteries) and minimise the risk of a post-impact fire caused by an electrical short circuit and hefty current from the main battery. In particular, it will also stop the fuel pumps from potentially squirting fuel all over the wreckage, without your having to remember to switch off your fuel pump off separately. Of course, you would never shut down the engine after parking, turn off the master switch and forget to turn off your fuel pump! Best wishes, Mike Dr Mike Gregory Europa Club safety officer 01480 451655 07885 355765 From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of William Daniell Sent: 05 April 2018 17:25 Subject: Europa-List: Rotax 914 Electric fuel pumps I have the Europa System with one of the pumps connected direct to the alternator and the other to the bus. I get the logic of a direct connection to the alternator. Why isn't the other pump connected direct to the battery so that if the alternator fails you can switch off the buss run one pump off the battery? (My EFIS has a back up battery and I carry a hand held so I can operate with the buss off.) thanks Will William Daniell LONGPORT +57 310 295 0744 ------------------------------------------------------------------------------------- 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.