---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 08/26/21: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:15 AM - Re: Matronics List Forum Web Site Fully Restored... (Larry Mac Donald) 2. 09:35 AM - Re: SD8 - rewinding for 28V (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 09:15:59 AM PST US From: Larry Mac Donald Subject: Re: AeroElectric-List: Matronics List Forum Web Site Fully Restored... Matt, I have been subscribed to several of your lists but for at least two years I havent received one message. Since you now have the data base fixed, will I start receiving messages ? Larry Mac Donald lm4@juno.com > On Aug 25, 2021, at 7:34 PM, Matt Dralle wrote: > > > Dear Listers, > > There has been an issue with the database used to drive the Matronics Lists Forums Web Site for a few days. I finally got to the bottom of the issue today. It appears the functionality has been fully restored. > > > Matt Dralle > Matronics List Administrator > ____________________________________________________________ Sponsored by https://www.newser.com/?utm_source=part&utm_medium=uol&utm_campaign=rss_taglines_more US Casualties Reported in 2 Blasts at Kabul Airport http://thirdpartyoffers.juno.com/TGL3141/6127be00b36273dff484ast01vuc1 Fla. Governor Just Earned a Dubious New COVID Honor http://thirdpartyoffers.juno.com/TGL3141/6127be00d2a2d3dff484ast01vuc2 Lawmakers Say Trip to Kabul Changed Their Minds http://thirdpartyoffers.juno.com/TGL3141/6127be00f20053dff484ast01vuc3 ________________________________ Message 2 _____________________________________ Time: 09:35:17 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: SD8 - rewinding for 28V At 11:13 PM 8/25/2021, you wrote: > >I have a SD8 alternator (14V) on the shelf and a 28V single >alternator system in the hangar. > >Under the guide of education and recreation, I wonder if I could >disassemble the SD8 and rewind it with more turns of smaller wire to >make it more appropriate for a 28V application? > >Conceptually this is a simple idea, but I wonder if in practice I >will have issues like losing strength in the magnets when I >disassemble the alternator, or it being impossible to remove the >existing windings without damage to the stator, etc. > >Any and all input welcome. It is possible/practical to rewind the SD8 stator for other performance goals. There are no risks to the hardware for having disassembled it. You basically need to double the number of turns per pole and use smaller wire so that the increased turns do not overrun the available space. Count the turns on each pole as it's disassembled and note the wire routing between poles for installing the new winding. Remember that cross section of the wire varies as square of diameter. So for 1/2 the area, you'll need wire on the order of 0.7x the diameter of the original. Good luck! Let us know what you discover. Bob . . . Un impeachable logic: George Carlin asked, "If black boxes survive crashes, why don't they make the whole airplane out of that stuff?" ------------------------------------------------------------------------------------- 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.