---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 05/19/21: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:21 AM - Re: Magnetism (Bobby Paulk) 2. 09:57 PM - was "Contactor Questions" now battery in the trunk (Bob Verwey) ________________________________ Message 1 _____________________________________ Time: 06:21:07 AM PST US From: Bobby Paulk Subject: AeroElectric-List: Re: Magnetism When we were building two airplanes in a large hangar my rudder cables got relocated to a DC welding machine where they laid for several days while the welder was used several times. I located my remote compass to the rear bottom of the fuselage ( right between the galvanized rudder cables ). When trying to calibrate the compass it would swing wildly when moving the rudder even slightly. We tried degauzing with a solder gun and even found an old TV degauzing ring to no avail. Finally moved the compass up high above the baggage compartment and it worked fine. ________________________________ Message 2 _____________________________________ Time: 09:57:42 PM PST US From: Bob Verwey Subject: AeroElectric-List: was "Contactor Questions" now battery in the trunk This is kinda related to contactors... On the BD4 that I am rebuilding, the battery is behind the baggage compartment, with a really fat wire running up to the firewall. IO 470 engine so lots of amps required for start. Is there a recommended contactor placement/battery disconnect protocol out there? I'm thinking safety in the event of an incident which might short out the fat wire to the fuselage. My setup is very rudimentary (steam 8 pack), conventional engine gauges, perhaps a mini EFIS. I did try the Forum search but struggled a little.... Best Regards, Bob Verwey 082 331 2727 On Fri, 14 May 2021 at 05:46, A Lumley wrote: > andrew.lumley@sympatico.ca> > > Thanks to you both for the quick feedback. I'll include the jumper from > the contactor "I" terminal to the starter with the extra diode. > > You are correct that B&C no longer sells the crowbar module so I was going > to build my own from your crowbar schematics. > > Thanks again, I'm sure I'll have lots more questions... > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=501914#501914 > > ------------------------------------------------------------------------------------- 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.