---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 03/02/08: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:44 AM - Re: New toy in the AEC shop . . . (Michael Pereira) 2. 06:54 AM - Re: New toy in the AEC shop . . . (Eric M. Jones) 3. 08:53 AM - Re: New toy in the AEC shop . . . (Robert L. Nuckolls, III) 4. 03:23 PM - acs sb92-01 (Bill and Marsha) 5. 04:08 PM - Re: acs sb92-01 (Sam Hoskins) 6. 06:19 PM - Ignition control in a dual alternator dual bus system (Dr. Leo Davies) 7. 09:27 PM - Re: Ignition control in a dual alternator dual bus system (Robert L. Nuckolls, III) 8. 10:50 PM - Re: Ignition control in a dual alternator dual bus system (Dr. Leo Davies) ________________________________ Message 1 _____________________________________ Time: 12:44:56 AM PST US From: "Michael Pereira" Subject: Re: AeroElectric-List: New toy in the AEC shop . . . > > Hmmmm . . . wonder if I need to hit up Mr. Gore > > for some carbon-credits. I'm going to dump about > > 100# of CO2 this weekend. Maybe I'd better get > > him to plant some trees for me or something. > > > > If planting a young tree earns carbon credits, then not cutting down an > old tree should be worth even more credits. I have a few thousand pine > trees that I promise not to cut down. You are welcome to apply those > credits to your temperature chamber. I'll just promise not to exhale on alternate breaths. If that doesn't work, well, reduce co2, kill a mammal. c'ya, Mike ________________________________ Message 2 _____________________________________ Time: 06:54:13 AM PST US Subject: AeroElectric-List: Re: New toy in the AEC shop . . . From: "Eric M. Jones" We once developed a device that had designers in Switzerland and the US. Whenever the power supply in the device was tested in Switzerland it passed all tests in the environmental chamber. When tested in the US it flunked due to a load resistor that would overheat an output filter capacitor in a purchased UL/CSA/IEC/TUV power supply. The prototypes seemed to be in Fedex transit permanently and accusation flew, and schedules flew too...out the window. The Swiss environmental chamber was super-high tech and had powerful mixing fans to make sure that nothing in the chamber deviated from anything else by more than 1/10 degree. The power supply worked very well inside the chamber. But no place else. -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones@charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=167238#167238 ________________________________ Message 3 _____________________________________ Time: 08:53:19 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: New toy in the AEC shop . . . At 02:16 PM 3/1/2008 -0500, you wrote: > > > >Robert L. Nuckolls, III wrote: >>Hmmmm . . . wonder if I need to hit up Mr. Gore >>for some carbon-credits. I'm going to dump about >>100# of CO2 this weekend. Maybe I'd better get >>him to plant some trees for me or something. >You are dumping pre-existing CO2 - not making more of it. Carbon credits >apply to a process that creates CO2 from a source where carbon is >previously trapped, chemically or otherwise. Granted, compressing it does >take energy, but probably not any more than using a refrigerated >environmental chamber rather than one cooled by CO2. Good point. Bob . . . ________________________________ Message 4 _____________________________________ Time: 03:23:21 PM PST US From: "Bill and Marsha" Subject: AeroElectric-List: acs sb92-01 Can anyone point me to a link wha I can find this service bulletin (acs sb92-01) Thanks Bill S. ________________________________ Message 5 _____________________________________ Time: 04:08:20 PM PST US From: "Sam Hoskins" Subject: Re: AeroElectric-List: acs sb92-01 Just plug it into Google. *Sam Hoskins Murphysboro, IL Quickie Blog Quickie Website **On Sun, Mar 2, 2008 at 5:19 PM, Bill and Marsha wrote: * > > * Can anyone point me to a link wha I can find this service bulletin (acs > sb92-01) Thanks Bill S.* > > * > > * > > * * ________________________________ Message 6 _____________________________________ Time: 06:19:57 PM PST US From: "Dr. Leo Davies" Subject: AeroElectric-List: Ignition control in a dual alternator dual bus system Dear List, I am currently designing the electrical system for my "all-electric" RV 10. I have been very happy with Bob's architecture for my RV6A which worked beautifully the day my alternator died in the clouds. I am looking at the Z-14 schematic which involves two batteries, two alternators and a cross feed for starting and for electron sharing in failure mode. I note that there are no switching diagrams for mags or other ignition systems on this diagram. I wondered what the implications for mag switching were in this setup. Should they just have simple switches but only turn on the impulse coupled mag for a start? If so, how serious are the implications if the non-coupled mag is accidentally enabled at startup? If I ran an electronic system on the left would you only turn this on after start and again stick with impulse coupling on the standard mag for the start. I would be pleased to hear from anyone who has used this schematic as the basis for their electrical system as to how they had handled the ignition switching. Thanks for your help. Leo Davies -- A/Prof Leo Davies, Sub-Dean, Head of Assessment, Faculty of Medicine, Edward Ford Building, University of Sydney 2006 ________________________________ Message 7 _____________________________________ Time: 09:27:54 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Ignition control in a dual alternator dual bus system At 01:30 PM 3/3/2008 +1100, you wrote: > > >Dear List, > >I am currently designing the electrical system for my "all-electric" RV >10. I have been very happy with Bob's architecture for my RV6A which >worked beautifully the day my alternator died in the clouds. > >I am looking at the Z-14 schematic which involves two batteries, two >alternators and a cross feed for starting and for electron sharing in >failure mode. > >I note that there are no switching diagrams for mags or other ignition >systems on this diagram. I wondered what the implications for mag >switching were in this setup. Should they just have simple switches but >only turn on the impulse coupled mag for a start? If so, how serious are >the implications if the non-coupled mag is accidentally enabled at >startup? If I ran an electronic system on the left would you only turn >this on after start and again stick with impulse coupling on the standard >mag for the start. > >I would be pleased to hear from anyone who has used this schematic as the >basis for their electrical system as to how they had handled the ignition >switching. > >Thanks for your help. Leo, Why such a heavy, complex, expensive electrical system? How about going with Z-13/8 and use the money you saved to put at least one E-Mag on? Leave your impulse coupled mag in place and replace the non-coupled with an E or better yet, a P-Mag. Then, both ignitions can be ON for cranking. If you ever have the coupled-mag crap, you can put the non- coupled back on and wire it like Z-27. Make both ignition switches a DPDT ON-ON (S702-3 or equal) from the get-go. This will produce an exceedingly reliable system with a minimum of cost and get you a really nice sparking ignition for cranking. Bob . . . ________________________________ Message 8 _____________________________________ Time: 10:50:05 PM PST US From: "Dr. Leo Davies" Subject: Re: AeroElectric-List: Ignition control in a dual alternator dual bus system Robert L. Nuckolls, III wrote: > > > At 01:30 PM 3/3/2008 +1100, you wrote: > >> >> >> Dear List, >> >> I am currently designing the electrical system for my "all-electric" >> RV 10. I have been very happy with Bob's architecture for my RV6A >> which worked beautifully the day my alternator died in the clouds. >> >> I am looking at the Z-14 schematic which involves two batteries, two >> alternators and a cross feed for starting and for electron sharing in >> failure mode. >> >> I note that there are no switching diagrams for mags or other >> ignition systems on this diagram. I wondered what the implications >> for mag switching were in this setup. Should they just have simple >> switches but only turn on the impulse coupled mag for a start? If so, >> how serious are the implications if the non-coupled mag is >> accidentally enabled at startup? If I ran an electronic system on the >> left would you only turn this on after start and again stick with >> impulse coupling on the standard mag for the start. >> >> I would be pleased to hear from anyone who has used this schematic as >> the basis for their electrical system as to how they had handled the >> ignition switching. >> >> Thanks for your help. > > > Leo, Why such a heavy, complex, expensive electrical system? > > How about going with Z-13/8 and use the money you saved to > put at least one E-Mag on? Leave your impulse coupled mag in > place and replace the non-coupled with an E or better yet, > a P-Mag. Then, both ignitions can be ON for cranking. If > you ever have the coupled-mag crap, you can put the non- > coupled back on and wire it like Z-27. Make both ignition > switches a DPDT ON-ON (S702-3 or equal) from the get-go. > > This will produce an exceedingly reliable system with > a minimum of cost and get you a really nice sparking > ignition for cranking. > > Bob . . . > Bob, Thank you for your prompt reply. The thing that had primarily motivated me towards the Z-14 was the fact that I am planning to install a Garmin G900X. The specs for this nominate a current draw of 16-28 amps! With this mighty beast sucking electrons I was moved towards the B&C 20 amp alternator as a backup and the added reserve of two PC680 batteries to provide some buffer, as well as additional cranking power for that big 6 cylinder engine. I have, as stated above, been very happy with the performance of your architecture in my current plane so am not inclined to ignore your suggestions. Having said that, the B&C alternator and regulator have performed so nicely I was quite looking forward to having two of them.... ;-) Do you think the Z 13/8 would carry the Garmin? I sure hate to turn off all that good stuff just cause an alternator has gone belly up. Thanks again, Leo > > > !DSPAM:47cb911624381654078673! -- A/Prof Leo Davies, Sub-Dean, Head of Assessment, Faculty of Medicine, Edward Ford Building, University of Sydney 2006 ------------------------------------------------------------------------------------- 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.