---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 07/10/20: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:33 AM - Re: Re: Exploring a Different Way to Wire Avionics (GTH) 2. 10:46 AM - Re: Looking for help finalysing my Cozy's electrical system (johnbright) 3. 11:27 AM - Re: Exploring a Different Way to Wire Avionics (donjohnston) ________________________________ Message 1 _____________________________________ Time: 05:33:42 AM PST US Subject: Re: AeroElectric-List: Re: Exploring a Different Way to Wire Avionics From: GTH Le 10/07/2020 02:24, donjohnston a crit: > The "innards" are just traces on a board. I can't imagine having to troubleshoot it, but if you did, it would be pretty easy. I meant, how do you troubleshoot your installation should anything go wrong. You seem to imply they are providing their 'box schematics ? > > In the event you have something outside of the typical device, you just modify the configuration plug. OK, you just make another plug/connector/ bundle. > > > Is it really DIY if you buy a radio as opposed to building one yourself? > Is it really DIY if you buy an engine as opposed to building one yourself? > I could go on... No problem. I was just thinking of choosing one's items and *fabricating* something, e.g. the bundles, plugs, connectors, as opposed to buying everything premade. > Personally, I like being able to choose which tasks of the build I do myself and which ones I purchase off the shelf. You are certainly entitled to do that, and nobody would deny. My questions were just to ascertain whether there really was a "different way to wire avionics" or just another premade bundle/interconnect box etc. -- Best regards, Gilles http://contrails.free.fr http://lapierre.skunkworks.free.fr ________________________________ Message 2 _____________________________________ Time: 10:46:55 AM PST US Subject: AeroElectric-List: Re: Looking for help finalysing my Cozy's electrical system From: "johnbright" Hi Eric, My thoughts: The EFII harness has an un-necessary SPOF; powering all four injectors thru one wire. You do not have to accept this SPOF. I would assume the fusible links built into the harness are capable of opening the injector breakers. Power the four injectors thru four fuses, a 5A fuse is good for one injector. Do the EFII supplied firewall connectors melt in a fire? Does it make sense to have main reg v sense on VPX? (I haven't studied VPx) It's confusing to show injectors grounded within injector power harness. The voltage regulator "bus" feed should have a 5A CB versus a fuse because of nuisnace trip potential of crowbar. Replace circuit breakers with MIDIs or fuselink wire except voltage regulator "bus" feed needs to be a CB because of crowbar nuisance trips. Design your electrical system for a simple, no questions asked, engine out procedure. You will forget details of your architechture and your intelligence will fall 90% when the engine quits. Consider switching to Z-101. -------- John Bright, RV-6A, at FWF, O-360 Z-101 single batt dual alt SDS EM-5-F. john_s_bright@yahoo.com, Newport News, Va https://drive.google.com/drive/folders/1u6GeZo6pmBWsKykLNVQMvu4o1VEVyP4K Read this topic online here: http://forums.matronics.com/viewtopic.php?p=497237#497237 ________________________________ Message 3 _____________________________________ Time: 11:27:21 AM PST US Subject: AeroElectric-List: Re: Exploring a Different Way to Wire Avionics From: "donjohnston" > I meant, how do you troubleshoot your installation should anything go > wrong. You seem to imply they are providing their 'box schematics ? Yes. You receive a wiring diagram which shows the connections. > My questions were just to ascertain whether there really was a > "different way to wire avionics" or just another premade > bundle/interconnect box etc. My previous airplane and and every other one I've looked had the avionics wired the same way. Cables connecting a device to one or more other devices. The audio panel seemed to have the most connections to other devices. That's one way. In my current aircraft, there is only one physical cable between the devices (other that the audio panel and EFIS's which have two) and the hub. In my opinion, it's a different way of wiring avionics. Which means if I want to change the type of com radio, all I need to do is build a new cable that connects the radio to the hub. I don't have to mess with the connections to the audio panel or the EFIS's. If the new radio is significantly different, I may need to modify the configuration plug on the hub. But for something like a com or nav radio, that's pretty unlikely. Now in the interest of full disclosure, the hub has no power distribution. So every cable has a pigtail with two wires for power. So my Com1 cable has a red and black wire that connects to power and ground. Same for every other device cable. Some (like my EFIS) have three separate power leads. My GPS has additional leads for things like my ELT. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=497238#497238 ------------------------------------------------------------------------------------- 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.