X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=PKtNwriC c=1 sm=1 tr=0 a=YKy5iuLXnxoOKB4xgfqhSw==:117 a=x7bEGLp0ZPQA:10 a=TPB0gybzSFkA:10 a=2ur7OfE09M0A:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=_6GpL_ENAAAA:8 a=2Qb-cDHQz1YuTWleoTgA:9 a=QEXdDO2ut3YA:10 a=LDJc5fHIyFDZGIDFkf0A:9 a=cCRKBdOjcc2nVpom:21 a=Urk15JJjZg1Xo0ryW_k8:22 From: "Robert McMillan robmcmillanpls@gmail.com" Received: from mail-ot1-f53.google.com ([209.85.210.53] verified) by logan.com (CommuniGate Pro SMTP 6.2.10) with ESMTPS id 11983709 for flyrotary@lancaironline.net; Mon, 10 Dec 2018 15:11:24 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.53; envelope-from=robmcmillanpls@gmail.com Received: by mail-ot1-f53.google.com with SMTP id k98so11715765otk.3 for ; Mon, 10 Dec 2018 12:11:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=iXFScGK5YOgNPK2UeiLtXSL9NcmaMF3AWiJ+nz3x/8Q=; b=uWRVpVOVwvQz/+3UvpIriigok+jwf0RBBrZfPdKkFnfZOZ/+pQS9mkabEI97XhOJSz ZcI4jH0TlxOMSau+G7w4UQbEXaWwEt2GPleO+kjnzcr7fy+efYA5Zi4pfquKXCH02AJX +xw53iHopCSn3b3Q5TWjzzG2skXDuKLnEtzNndJTFMGErDjC1QFffiPBeXJbmS81ZuOM QZ2jV7g27iupWUO18Y4IXKNME6X566Sam5GL9JL3V8tejZTOy3ZWzxGMAx24I4KMxc71 oG1DY4L+7vF26c13ezfuLzqP5tRWKSd1wIRNUD210AQMdzdBL9dCNdQ9ccuaL6f8i0Zt /3wA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=iXFScGK5YOgNPK2UeiLtXSL9NcmaMF3AWiJ+nz3x/8Q=; b=Nbmt0aJ1J41Z7ThbZYdDaM7DcTw9RBaOO5nZYqkXUEJq6f8F/gkQNerM329A3GHd6O jnnLtz/17bHgeRV/IkvmLFu5b8BWb4AIoypp9DE3ZP2E1L4/yWMJY4KWglgaZNSFN6yj qZYeAOvpgS8mRfN8pLQxjbIlBhvuFiQBzdYLQgBLS8z1tmDeZyJrlP/KLWvm3cSgQSfc fQ0CCoZfJ7sV36vYIrmfgCSx3DBXgW3OhE4Om+sjCoxMySaX10vMJdJuiGmKxiDsTs0j 1tuDskQ+HYNvxmAoU7Nhva01R1IUsdCtBuYReUk2h5Qn/v1O9mvmEpD3h4ctEQ/fJYun d+kg== X-Gm-Message-State: AA+aEWbFx6zMbYRDDZYXwCCZ4AXEq7dHgCNqENJprsHQrImUvNj9sSDK QhwchhxZUVPqh+csbIQaBJlxc4aIRre2XOhp3kjbug== X-Google-Smtp-Source: AFSGD/VspG1rOw5P4mOWkuo+yHz6K8SUBy5+hhTdEeag5z6J8b8pXZKhSzl+UrKUosmXjSv/O7MGgJA2JBgctDYZg28= X-Received: by 2002:a05:6830:1c5:: with SMTP id r5mr9748561ota.356.1544472667054; Mon, 10 Dec 2018 12:11:07 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: Date: Mon, 10 Dec 2018 12:16:14 -0800 Message-ID: Subject: Re: [FlyRotary] avionics minefields.... To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000af67a3057cb090af" --000000000000af67a3057cb090af Content-Type: text/plain; charset="UTF-8" Come on Charlie, it's Monday... On Mon, Dec 10, 2018, 9:44 AM Charlie England ceengland7@gmail.com < flyrotary@lancaironline.net wrote: > If any of you guys out there tend toward OCD and are currently wiring your > plane, here's a heads-up. > > I probably know too much (or maybe not enough) for my own good about > electrical stuff, including issues like electrical noise & ground loops. So > when I created the wiring harnesses for my RV-7 a couple of years ago, I > tried to make sure I avoided ground-related issues by carefully routing > grounds *exactly* where they should be according to the avionics > documentation, and making my best educated guess when I couldn't find any > good documentation. > > Well, I laid a couple of mines, & didn't step on them until I installed > the instruments to do a test powerup, prior to closing out the fuselage. > The intercom wouldn't power up, and neither would my Anderson engine > monitor. After spending a couple of days digging through my extensive (but > not very well done) notes, I found the sources of my problems. > > The intercom has a 'floating' chassis, and you're directed to run the > ground wire to the radio. I did this; running the ground to the power > ground in the GNS430's tray. I also thought it would be smart to ground the > Anderson monitor to the main ground point in the EC-2, so I tied it to pins > 19 & 37, which are then grounded to the engine block. (I documented the > power connections well, but the ground side...not so much.) > > So on my 1st real power-up test of the system, not wanting to put multiple > high dollar instruments at risk, I only powered or installed a single > instrument at a time. Anyone see the mines yet? > > Charlie > > > Virus-free. > www.avast.com > > <#m_7246867627279806001_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > --000000000000af67a3057cb090af Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Come on Charlie, it's Monday...=C2=A0=C2=A0

=
On Mon, Dec 10, 2018, 9:44 AM C= harlie England ceengland7@gmail.com= <flyrotary@lancairon= line.net wrote:
If any of you guys= out there tend toward OCD and are currently wiring your plane, here's = a heads-up.
I probably kn= ow too much (or maybe not enough) for my own good about electrical stuff, i= ncluding issues like electrical noise & ground loops. So when I created= the wiring harnesses for my RV-7 a couple of years ago, I tried to make su= re I avoided ground-related issues by carefully routing grounds *exactly* w= here they should be according to the avionics documentation, and making my = best educated=C2=A0guess when I couldn't find any good documentation.= =C2=A0

Well, I laid a cou= ple of mines, & didn't step on them until I installed the instrumen= ts to do a test powerup, prior to closing out the fuselage. The intercom wo= uldn't power up, and neither would my Anderson engine monitor. After sp= ending a couple of days digging through my extensive (but not very well don= e) notes, I found the sources of my problems.=C2=A0

The intercom has a 'floating' chassis, a= nd you're directed to run the ground wire to the radio. I did this; run= ning the ground to the power ground in the GNS430's tray. I also though= t it would be smart to ground the Anderson monitor to the main ground point= in the EC-2, so I tied it to pins 19 & 37, which are then grounded to = the engine block. (I documented the power connections well, but the ground = side...not so much.)=C2=A0=C2=A0

So on my 1st real power-up test of the system, not wanting to put m= ultiple high dollar instruments at risk, I only powered or installed a sing= le instrument at a time. Anyone see the mines yet?

Charlie

3D"" Virus-free. www.avast.c= om
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