---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 08/11/11: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:58 AM - Wire size question for Z13/8. (Matthew Schumacher) 2. 11:07 AM - Stop nuts one terminal studs? (messydeer) 3. 12:07 PM - Re: Wire size question for Z13/8. (Bob Meyers) 4. 01:08 PM - Re: Wire size question for Z13/8. (Bob Meyers) 5. 02:26 PM - Re: Stop nuts one terminal studs? (Richard Girard) 6. 05:35 PM - Re: More FUD (Fear Uncertainty and Doubt)? (cjay) 7. 08:27 PM - Re: Re: More FUD (Fear Uncertainty and Doubt)? (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 10:58:16 AM PST US From: Matthew Schumacher Subject: AeroElectric-List: Wire size question for Z13/8. Bob, I'm looking at Z13/8 getting ready to order wire. I'm looking at the wire sizes and noticed that the drawing calls for 20awg for the starter contactor switch and 22awg for the battery contactor switch. Why is this? Is it because the starter contactor draws more current? Or perhaps the run is longer? Thanks, schu ________________________________ Message 2 _____________________________________ Time: 11:07:01 AM PST US Subject: AeroElectric-List: Stop nuts one terminal studs? From: "messydeer" Hi! I have a 3/16 to 1/4" studs on my battery, battery contactor, starter contactor and ground posts. Some came with simple jam-type nuts with a split ring washer. What type of nuts and washers should I use FWF? I've got MS21042-3 and -4 that would work for some. Others are metric and wold need a separate lock washer of sorts. Thanks! -------- Dan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=349196#349196 ________________________________ Message 3 _____________________________________ Time: 12:07:11 PM PST US Subject: Re: AeroElectric-List: Wire size question for Z13/8. From: Bob Meyers Different Bob, but yes, the starter contractor draws much more than the battery contractor. Typical draw of a starter contractor is around five amps vs. less than an amp for a battery contractor. Bob Meyers Flying my Sonex N982SX - Building log at http://n982sx.com Sent from my iPad On Aug 11, 2011, at 12:44 PM, Matthew Schumacher wrote: > > Bob, > > I'm looking at Z13/8 getting ready to order wire. I'm looking at the > wire sizes and noticed that the drawing calls for 20awg for the starter > contactor switch and 22awg for the battery contactor switch. Why is > this? Is it because the starter contactor draws more current? Or > perhaps the run is longer? > > Thanks, > schu > > > > > > ________________________________ Message 4 _____________________________________ Time: 01:08:48 PM PST US Subject: Re: AeroElectric-List: Wire size question for Z13/8. From: Bob Meyers Seems like my iPad decided I didn't know how to spell and decided to change 'contactor' into 'contractor'. I hate it when that happens. Bob Meyers Flying my Sonex N982SX - Building log at http://n982sx.com Sent from my iPad On Aug 11, 2011, at 1:59 PM, Bob Meyers wrote: > > Different Bob, but yes, the starter contractor draws much more than the battery contractor. Typical draw of a starter contractor is around five amps vs. less than an amp for a battery contractor. > > Bob Meyers > > Flying my Sonex N982SX - Building log at http://n982sx.com > > Sent from my iPad > > On Aug 11, 2011, at 12:44 PM, Matthew Schumacher wrote: > >> >> Bob, >> >> I'm looking at Z13/8 getting ready to order wire. I'm looking at the >> wire sizes and noticed that the drawing calls for 20awg for the starter >> contactor switch and 22awg for the battery contactor switch. Why is >> this? Is it because the starter contactor draws more current? Or >> perhaps the run is longer? >> >> Thanks, >> schu >> >> >> >> >> >> > > > > > > ________________________________ Message 5 _____________________________________ Time: 02:26:17 PM PST US Subject: Re: AeroElectric-List: Stop nuts one terminal studs? From: Richard Girard Dan, If your metric contactor studs are 6mm X 1.0, the 21042-4 will go right on. I use them on Rotax vibration dampers to mount the radiator on my plane and they work just fine. FWIW, Rick Girard On Thu, Aug 11, 2011 at 12:56 PM, messydeer wrote: > > Hi! > > I have a 3/16 to 1/4" studs on my battery, battery contactor, starter > contactor and ground posts. Some came with simple jam-type nuts with a split > ring washer. What type of nuts and washers should I use FWF? I've got > MS21042-3 and -4 that would work for some. Others are metric and wold need a > separate lock washer of sorts. > > Thanks! > > -------- > Dan > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=349196#349196 > > -- Zulu Delta Mk IIIC Thanks, Homer GBYM It isn't necessary to have relatives in Kansas City in order to be unhappy. - Groucho Marx ________________________________ Message 6 _____________________________________ Time: 05:35:07 PM PST US Subject: AeroElectric-List: Re: More FUD (Fear Uncertainty and Doubt)? From: "cjay" "If you have a fuse/breaker/switch system, you know where every part comes from and what spares will cost you for repairs. If the VP system gets a cold, your airplane is down while the factory repairs it. It uses software you didn't write, parts you didn't buy and couldn't replace even if you had them . . . 'cause you don't understand it. " The VP system tells you exactly and precisely what device/avionics/electronic is surging, overloading, shorting, etc. Much more information than a fuse or breaker provides. Great system for monitoring, tweaking, and measuring. Never heard of a VP system going back to the factory, but I suppose it happens. What do you do when a radio/EFIS/autopilot goes bad if you don't send it back to the factory? Or maybe modern electronics violates your principle of why we choose to build our own plane? You must be flying with analogue/vacuum gauges. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=349223#349223 ________________________________ Message 7 _____________________________________ Time: 08:27:08 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: More FUD (Fear Uncertainty and Doubt)? At 07:27 PM 8/11/2011, you wrote: "If you have a fuse/breaker/switch system, you know where every part comes from and what spares will cost you for repairs. If the VP system gets a cold, your airplane is down while the factory repairs it. It uses software you didn't write, parts you didn't buy and couldn't replace even if you had them . . . 'cause you don't understand it. " The VP system tells you exactly and precisely what device/avionics/electronic is surging, overloading, shorting, etc. Much more information than a fuse or breaker provides. In 45 years of working in general aviation and in 25 years as a pilot, I've never felt the need for knowing such things in flight . . . Great system for monitoring, tweaking, and measuring. Never heard of a VP system going back to the factory, but I suppose it happens. If you are curious about such things, you can easily monitor/measure any number of parameters of interest with commercial off-the-shelf data acquisition systems that are not integral to the power distribution system. But believe me, after pouring over a hundred hours of data where "nothing is happening" I think you'll find other more interesting things to do with your time. You're worrying about things that are first rare and secondly do not represent a hazard to flight. What do you do when a radio/EFIS/autopilot goes bad if you don't send it back to the factory? Or maybe modern electronics violates your principle of why we choose to build our own plane? You must be flying with analogue/vacuum gauges. The airplane does not fall out of the sky when a radio quits, nor should it fall out of the sky if some article of power distribution equipment quits. That's what failure mode effects analysis and Plan-B is all about. You reposition a couple of switches and continue flight to a comfortable arrival . . . and it doesn't take one byte of software to do it. We were doing it decades before glass screens and micro-controllers came along. It's easy to get enamored of doing a thing simply because it can be done. Just tonight I had to struggle through the magic panel on a new radio in my truck. All I ever wanted was on-off, band, tune and volume. But this thing stores a qazillion frequencies, five channels of two bands, plays flash drives, plays CDs and has an aux audio input with half octave equalizers and features I can't even name much less tell you what they do for me. Hat dancing over the array of 20 buttons will, no doubt, do some whippy things. It took me more than a minute to get my grandson's favorite radio station located and on speakers. I think your electrical system is a similar situation with exceedingly simple design goals that do not get 'better cause you can do more'. 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