---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 01/24/15: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:12 AM - Re: Power Generation without Battery? (user9253) ________________________________ Message 1 _____________________________________ Time: 07:12:52 AM PST US Subject: AeroElectric-List: Re: Power Generation without Battery? From: "user9253" Lightspeed and others recommend connecting electronic ignition directly to the battery. Since Lithium batteries have been known to short out, maybe they should not be used. If the battery shorts out, so will the alternators be shorted. Another failure mode to be considered is a failed master contactor shortly after takeoff. That is not very likely to happen, but it could. Regardless of what the manufacturers say, an alternator could keep supplying power to the aircraft electrical system. Thus the pilot would not know that the master contactor has opened. If the duration of the flight is longer than the energy stored in the battery (likely with a Li battery), then the engine will quit. A solution to the failed master contactor scenario is a relay in parallel (disabled during engine cranking). Even if these failure modes are unlikely, everything needs to be considered when designing an electrical system. Accidents happen sometimes due to unlikely and unexpected chain of events. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=437550#437550 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-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/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-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.