---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 02/14/07: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:39 AM - Capacitor (george.mueller@aurora.org) 2. 01:41 PM - Re: Capacitor (Dave) 3. 05:00 PM - Re: Capacitor (Jack Kuehn) 4. 06:43 PM - Re: Capacitor (Thilo Kind) 5. 06:55 PM - Re: Capacitor (NYTerminat@aol.com) ________________________________ Message 1 _____________________________________ Time: 07:39:55 AM PST US Subject: RotaxEngines-List: Capacitor From: george.mueller@aurora.org I am installing a Rotax 912 in a Zenith 701. I see some installations with a capacitor and some without. Recent posts have indicated a downside to the capacitor in that it can cause some problems if the alt switch is shut off with the engine running. What are the pros and cons of the capacitor? George in Milwaukee Zenith 701 912 ________________________________ Message 2 _____________________________________ Time: 01:41:37 PM PST US From: "Dave" Subject: RE: RotaxEngines-List: Capacitor I've had no problems with my installation; although, my capacitor is slightly smaller than the one specified by Rotax. I also added an over-voltage protection circuit to my system as recommended by Bob at Aeroelectric. I purchased both from him. -----Original Message----- From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com]On Behalf Of george.mueller@aurora.org Sent: Wednesday, February 14, 2007 9:38 AM To: rotaxengines-list@matronics.com Subject: RotaxEngines-List: Capacitor I am installing a Rotax 912 in a Zenith 701. I see some installations with a capacitor and some without. Recent posts have indicated a downside to the capacitor in that it can cause some problems if the alt switch is shut off with the engine running. What are the pros and cons of the capacitor? George in Milwaukee Zenith 701 912 ________________________________ Message 3 _____________________________________ Time: 05:00:05 PM PST US From: Jack Kuehn Subject: Re: RotaxEngines-List: Capacitor I also installed components from Bob at AeroElectric, including the over voltage protector and the capacitor. As I understood it, without the capacitor, if for some reason the battery was disconnected from the system while the engine was running, with no capacitor, the engine will quit, while with it, it will keep running. I was basically so impressed by Bob's design approach, which is essentially: "if it can break, eventually it will, so either design a backup or make the system inessential for continued flight." I have no problems with any of this stuff, and running the engine on BATT only is no problem as far as I know. Bob would be the guy to ask about this! Jack Dave wrote: > I've had no problems with my installation; although, my capacitor is > slightly smaller than the one specified by Rotax. I also added an > over-voltage protection circuit to my system as recommended by Bob at > Aeroelectric. I purchased both from him. > > -----Original Message----- > *From:* owner-rotaxengines-list-server@matronics.com > [mailto:owner-rotaxengines-list-server@matronics.com]*On Behalf Of > *george.mueller@aurora.org > *Sent:* Wednesday, February 14, 2007 9:38 AM > *To:* rotaxengines-list@matronics.com > *Subject:* RotaxEngines-List: Capacitor > > > I am installing a Rotax 912 in a Zenith 701. I see some > installations with a capacitor and some without. Recent posts > have indicated a downside to the capacitor in that it can cause > some problems if the alt switch is shut off with the engine > running. What are the pros and cons of the capacitor? > > > George in Milwaukee > Zenith 701 912 > >* > >href="http://www.matronics.com/Navigator?RotaxEngines-List">http://www.matronics.com/Navigator?RotaxEngines-List >href="http://forums.matronics.com">http://forums.matronics.com > >* > >* > > >* > -- Jack Kuehn 5565 Brady Lane Lolo, MT 59847 (406) 273-6801 (406) 546-1086 (cell) (406) 273-2563 (fax) ________________________________ Message 4 _____________________________________ Time: 06:43:03 PM PST US From: "Thilo Kind" Subject: Re: RotaxEngines-List: Capacitor Hi there, I have the standard capacitor installed as per Rotax recommendation. 5 years with no problem so far. I don't understand why the engine should quit, when the battery is disconnected. The ignition system of the Rotax is totally independend of the electrical system. The engine will keep running with the master switch off (which essentially disconnects the battery). The capacitor is required to smoothen out any waviness in the current coming from the alternator, which might cause problems with the avionics and introduce funny sounds in the headsets. Thilo Kind -------- Original-Nachricht -------- Datum: Wed, 14 Feb 2007 17:59:49 -0700 Von: Jack Kuehn An: rotaxengines-list@matronics.com CC: Betreff: Re: RotaxEngines-List: Capacitor > > > I also installed components from Bob at AeroElectric, including the over > voltage protector and the capacitor. As I understood it, without the > capacitor, if for some reason the battery was disconnected from the > system while the engine was running, with no capacitor, the engine will > quit, while with it, it will keep running. I was basically so impressed > by Bob's design approach, which is essentially: "if it can break, > eventually it will, so either design a backup or make the system > inessential for continued flight." I have no problems with any of this > stuff, and running the engine on BATT only is no problem as far as I > know. Bob would be the guy to ask about this! > > Jack > > Dave wrote: > > > I've had no problems with my installation; although, my capacitor is > > slightly smaller than the one specified by Rotax. I also added an > > over-voltage protection circuit to my system as recommended by Bob at > > Aeroelectric. I purchased both from him. > > > > -----Original Message----- > > *From:* owner-rotaxengines-list-server@matronics.com > > [mailto:owner-rotaxengines-list-server@matronics.com]*On Behalf Of > > *george.mueller@aurora.org > > *Sent:* Wednesday, February 14, 2007 9:38 AM > > *To:* rotaxengines-list@matronics.com > > *Subject:* RotaxEngines-List: Capacitor > > > > > > I am installing a Rotax 912 in a Zenith 701. I see some > > installations with a capacitor and some without. Recent posts > > have indicated a downside to the capacitor in that it can cause > > some problems if the alt switch is shut off with the engine > > running. What are the pros and cons of the capacitor? > > > > > > > > > > George in Milwaukee > > Zenith 701 912 > > > >* > > > >href="http://www.matronics.com/Navigator?RotaxEngines-List">http://www.matronics.com/Navigator?RotaxEngines-List > >href="http://forums.matronics.com">http://forums.matronics.com > > > >* > > > >* > > > > > >* > > > > -- > Jack Kuehn > 5565 Brady Lane > Lolo, MT 59847 > > (406) 273-6801 > (406) 546-1086 (cell) > (406) 273-2563 (fax) > > > > -- "Feel free" - 5 GB Mailbox, 50 FreeSMS/Monat ... Jetzt GMX ProMail testen: www.gmx.net/de/go/mailfooter/promail-out ________________________________ Message 5 _____________________________________ Time: 06:55:12 PM PST US From: NYTerminat@aol.com Subject: Re: RotaxEngines-List: Capacitor In a message dated 2/14/2007 9:44:02 P.M. Eastern Standard Time, thilo.kind@gmx.net writes: Betreff: Re: RotaxEngines-List: Capacitor > --> RotaxEngines-List message posted by: Jack Kuehn > > As I understood it, without the > capacitor, if for some reason the battery was disconnected from the > system while the engine was running, with no capacitor, the engine will > quit, while with it, it will keep running. The charging circuit is independent of the ignition. It has nothing to do with keeping the engine running. The capacitor is there to alleviate any spikes from the charging dynamo. I was basically so impressed > by Bob's design approach, which is essentially: "if it can break, > eventually it will, so either design a backup or make the system > inessential for continued flight." I have no problems with any of this > stuff, and running the engine on BATT only is no problem as far as I > know. Bob would be the guy to ask about this! The battery is not needed to keep the engine running. > > Jack ------------------------------------------------------------------------------------- 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.