Pietenpol-List: P-Lead, Wire, Grounding, AM4 Mags

An archive of the Matronics Pietenpol Listserve.
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Pietenpol-List: P-Lead, Wire, Grounding, AM4 Mags

Post by matronics »

Original Posted By: steve(at)wotelectronics.com
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Pietenpol-List: Re: P-Lead, Wire, Grounding, AM4 Mags

Post by matronics »

Original Posted By: "taildrags"
It looks as though mykitplane is gone. I've gotten no response from the administratorand the sight (and all my past info) is lost. Time to move on.I want to post pictures and share with friends my build log. I believe kit logpro is the way to go for me. I however have a mac and will need to install awindows operating system for this app to work. Should I buy windows 7 or waitfor windows 8? I thought maybe some of you apple guys or computer people mighthave some words of wisdom for me before I make the plunge. Thanks--------John FrancisRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: P-Lead, Wire, Grounding, AM4 Mags
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Post by matronics »

Original Posted By: Dave and Connie
The ignition wiring on Scout is done exactly as Steve has described. Note, however,that this goes against what Tony Bingelis says in one of his books, at leastthe part about grounding the braid on the P-lead wire from the magneto tothe ignition switch. I don't have my books here in front of me (I know, I know,Mikee- I should always have them with me ;o), but I believe Bingelis saysthat the braid should only be grounded at one end, not both. Not sure why thatwould be, though. And since the magnetos have a lug for landing the groundbraid and the ignition switch does too (or at least a lug for landing the groundwire that shorts the P-lead to ground), I grounded both ends of the shieldedwire braid.I am ducking for cover, as I see electrons beginning to fly from the electricalsystem gurus even now.--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Wed, 24 Oct 2012 17:47:19 -0400
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Re: Pietenpol-List: Build Logs

Post by matronics »

Original Posted By: steve(at)wotelectronics.com
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Pietenpol-List: Re: Build Logs

Post by matronics »

Original Posted By: "K5YAC"
Clear as mud. I'll describe my setup in a little more detail and let's see whatI have. Let's use the (stainless steel sheet) firewall as the starting point.Firewall forward, I have the braid shielded P-leads from a screw terminalblock on the firewall, with the braid shields landed to a common "grounding" lugon the firewall. I put "grounding" in quotes because what the heck is it reallygrounded to? The metal firewall is really just the point of zero voltagereference, I guess you'd say.The leads continue forward to the magnetos, where I have the shields landed onthe magneto ground lugs at that end. I have a flat braided grounding strap fromthe engine block back to the "grounding" lug on the firewall, so it soundsto me like there are parallel ground paths right there. It didn't seem to methat the engine mount points (through rubber donuts) were a solid metallic pathbetween engine block, engine mount, and firewall so I added the flexible braidedgrounding strap.>From the screw terminal block through the firewall aft to the ignition switch,I have the braid shields of the P-leads landed on my "grounding" lug on the firewallat one end and on the ground terminal of the ignition switch, but otherthan that there aren't any continuous metallic grounding paths from the firewallaft.NOW clear as thick mud? For what it's worth, using a handheld COM radio has demonstratedthat there is no noticeable ignition noise from this setup.--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Build Logs
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Post by matronics »

Original Posted By: Michael Perez
Kit Log Pro is excellent, and it does the things you are wanting, and then some.In addition, it is developed and maintained by Matt Dralle, who is also theadministrator of Matronics. I really like the program and would recommend it first to anyone looking for builder'slog software.--------Mark ChouinardWings, Center Section and Empannage and Fuse framed up - Working on Landing GearRead this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Thu, 25 Oct 2012 06:28:38 -0700 (PDT)
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Re: Pietenpol-List: P-Lead, Wire, Grounding, AM4 Mags

Post by matronics »

Original Posted By: Jim Boyer
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