---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Thu 02/15/07: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:40 AM - Re: Capacitor (Gilles Thesee) ________________________________ Message 1 _____________________________________ Time: 01:40:19 AM PST US From: Gilles Thesee Subject: Re: RotaxEngines-List: Capacitor NYTerminat@aol.com a crit : > *e ignition. It has nothing to do with keeping the engine running. > The capacitor is there to alleviate any spikes from the charging dynamo. * > > ... > > *The battery is not needed to keep the engine running.* Hi all, True for the 912 and 912S, but the Rotax 914 is electrically dependant, and does need an electrical source to keep the engine running. One needs two independant electrical sources to have a reasonable engine redundancy. At the time, I made some lengthy experiments with the Rotax alternator and regulator. The capacitor is definitely needed to ensure proper working of the regulator. Some info here : http://contrails.free.fr/elec_ducati_en.php The main failure mode for the regulator, is from to high current draw. It does seem reasonable to expect more than about 12 amps continuous. The regulator doesn't come to life if a sufficient voltage is not applied to the sense wire, or if the alternator stalls, and the battery or regulator is depleted. As already stated, Bob Nuckolls has designed remarkable circuits for the Rotax installation, including OV protection, which I think is a must because of the miserable service record of the Rotax regulator. Due to its shortcomings, I ended up bench testing and installing a Schicke GR 4 regulator. Regards, Gilles Thesee http://contrails.free.fr ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.