X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=L5hfeKb8 c=1 sm=1 tr=0 a=T40O4dcgUsV62Xjw4JhiCg==:117 a=KwPsGajWcAwA:10 a=v2DPQv5-lfwA:10 a=t4HLnUn3AAAA:8 a=eRLigfuSAAAA:8 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=or5V_Y_7Ay07Q-yR8FUA:9 a=QEXdDO2ut3YA:10 a=m9UTjh2YrHwA:10 a=qdCXVjdAN5XDxgVydNkA:9 a=mjYjDoVzGpuvsb3-:21 a=FJRJB3nVjf-NFT9fIx6l:22 a=BfhXYjFvZD4iae-mNffo:22 a=Urk15JJjZg1Xo0ryW_k8:22 From: "Andrew Martin andrew@martinag.com.au" Received: from mail-qt0-f170.google.com ([209.85.216.170] verified) by logan.com (CommuniGate Pro SMTP 6.2.2) with ESMTPS id 10880209 for flyrotary@lancaironline.net; Tue, 27 Mar 2018 23:24:57 -0400 Received-SPF: none receiver=logan.com; client-ip=209.85.216.170; envelope-from=andrew@martinag.com.au Received: by mail-qt0-f170.google.com with SMTP id g5so1126817qth.7 for ; Tue, 27 Mar 2018 20:24:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=martinag-com-au.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=+uhN/hu/G7J/3jNq6+UVp/lTo2HilTRbPFmJlWPBrH8=; b=rcrW6lAd3IaN6am2RtLW59v50408KOFal3rTfZtbivS5qPIYV17I4w+McpvrCyY7Hm b0lhOdQ1c44MnIQJjCwxCsQ7POy2955OeHw4qjOn/UArJWKNx0aqkOvxYdaEvLZJsb6W pzTAw0zyp0NrcG/EbckgNfYgQ2prrJvaiQNhBpTQbPJrXDUwxKl2LixxG+n4T7V09r1A sHO7g/eSWw9IsRDrpBM+gX1B5kQGv6K6fj9VjI9w7uN7BuA7FRGITUZ7cX1Ivw898wHF njboCH+nVainArybiRtA4agj1lVfdh5PvG2vkhTNEbCiw5uw1KBT57ZbQVyWsMrDIYpG 0uZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=+uhN/hu/G7J/3jNq6+UVp/lTo2HilTRbPFmJlWPBrH8=; b=R0HZBxEsnwnWvEPuQq121fHvTvGoYKLP8WAKuOuS7R8rsovtBis8iDyeGb4HhCnpsS D14dzs3/oBSPPQziod8vZi4xb0u88lqWkFDwuhr9XMmcPBh7wL9STPJxyu+mGxmPOdld zjjbaRpZcUhOTTOsJHKs4+N95pR+UJB9WUUaHmhNL82Pj4eD8OZI/WAki0F5lTSQK9vm 0Vq6U11Y7aePrGpRgwhKDN+o7Q1I7yr1+Ce7mj1Dzf8HxriXZz0+VX8M7ejrba0PeMZY VLshDsISqbdzpMvm4rd3fC4XsDXa6vb35bV8X2L6WAmh6cxkhjyrLms8cVJASLoN2x+C Yb0g== X-Gm-Message-State: ALQs6tBjymu+oYhCF5X43lKh2SP8wGmrYCksZeiCzufAnOuS+8Uwu+Xt CyEDQGaTuJJSIK9uzMCMKb+tJZ8yBD79KPBRKYHAStI= X-Google-Smtp-Source: AIpwx4+XQOrpCap8j2yDWrka08tO7r0lpCgnMXk3wbG2MZeplUNX21SP8W//5beWfX6RKCvtZ96TCmmzLH647JPjkMk= X-Received: by 10.200.4.148 with SMTP id s20mr2927741qtg.144.1522207481109; Tue, 27 Mar 2018 20:24:41 -0700 (PDT) MIME-Version: 1.0 Received: by 10.12.244.81 with HTTP; Tue, 27 Mar 2018 20:24:00 -0700 (PDT) X-Originating-IP: [202.40.0.40] In-Reply-To: References: Date: Wed, 28 Mar 2018 11:24:00 +0800 Message-ID: Subject: Re: [FlyRotary] Re: back-up power for EC2 To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="f4030435b7c42fb4490568708cb8" --f4030435b7c42fb4490568708cb8 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable https://www.bandc.aero/essentialbusdiodew8wattheatsink.aspx Aero Electric is where I got this info from when wiring my plane. I used similar part as above but without the heatsink. just bolted it to airframe, in reality I dont think much heat is generated as not much power goes through the diode unless you try to power everything through it. but I do think I used 25a units just because I had them available and did not want the diodes capacity to be a limiting factor. Andrew On Wed, Mar 28, 2018 at 11:12 AM, Andrew Martin andrew@martinag.com.au < flyrotary@lancaironline.net> wrote: > No. Add one of those 4 post diodes externally. If I can find mine I=E2=80= =99ll > post part number. But pretty sure they are about 25a capacity, you only u= se > 3 of the pins, 2 in, 1 out. I think they are designed as rectifier, but a= re > really good for putting 2 power supplies into 1 load. > Andrew > > On Wed, 28 Mar 2018 at 11:04 am, Todd Bartrim bartrim@gmail.com < > flyrotary@lancaironline.net> wrote: > >> Hi Andrew; >> Are you suggesting that the EC2 has an internal diode bridge for this >> isolation function? I just checked and have 0.3 ohm between pins, >> indicating they are common internally. However I should mention my EC2 i= s >> an original model (serial #315) and I believe Tracy may have changed a f= ew >> things in later versions. It has been updated but this is only for firmw= are >> and not hardware. >> >> >> Todd Bartrim >> >> On Tue, Mar 27, 2018 at 7:53 PM, Andrew Martin andrew@martinag.com.au < >> flyrotary@lancaironline.net> wrote: >> >>> Todd, a diode bridge in between allows 2 separate power feeds and keeps >>> them isolated. >>> Andrew >>> >>> On Wed, 28 Mar 2018 at 10:50 am, Andrew Martin >>> wrote: >>> >>>> >>>> On Wed, 28 Mar 2018 at 10:46 am, Todd Bartrim bartrim@gmail.com < >>>> flyrotary@lancaironline.net> wrote: >>>> >>>>> Has anyone provided redundant power sources for their EC2? >>>>> Currently I have power supplied via a circuit breaker, but I'm >>>>> considering adding another power supply wire fed with a fuse. >>>>> However they would both still feed through pins 33 & 34 which are >>>>> internally connected. So even if I was to separate these pins for the= re own >>>>> feed (they are currently fed from the same wire), a short on either o= ne >>>>> would likely cause both the fuse and CB to blow. >>>>> I'm just trying to take care of a last few things on my list befor= e >>>>> taking this plane up to the airport and something I'd added to the li= st >>>>> many years ago was redundant power for the EC2 since a failure of tha= t >>>>> could really ruin my day. >>>>> Since the most likely point of failure (even though it's quite >>>>> unlikely) would be the DB37 pin connector on the EC2, I'm not sure th= at it >>>>> is worth the effort to open up the connector shell to add another pow= er >>>>> wire. >>>>> I've changed my mind on this several times over the last while and >>>>> now I'm running low on time so I'd throw it out for the collective wi= sdom >>>>> of the group. >>>>> >>>>> Todd Bartrim (can't think of anything witty to sign off with) (I >>>>> still miss Rusty's witt, for those that remember him) >>>>> >>>>> C-FSTB >>>>> RV9 Turbo13B >>>>> >>>> -- >>> >>> -- >>> Regards Andrew Martin Martin Ag >>> >> >> -- > Regards Andrew Martin Martin Ag > --f4030435b7c42fb4490568708cb8 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Aero Electric is where I got this info from when wirin= g my plane. I used similar part as above but without the heatsink. just bol= ted it to airframe, in reality I dont think much heat is generated as not m= uch power goes through the diode unless you try to power everything through= it. but I do think I used 25a units just because I had them available and = did not want the diodes capacity to be a limiting factor.
Andrew
<= br>


On Wed, Mar 28, 2018 at 11:12 AM, Andrew Mar= tin andrew@martinag.com.au <flyrotary@lancaironline.net> wrote:
No. Add one of those 4 post diodes externally. If I can find mine= I=E2=80=99ll post part number. But pretty sure they are about 25a capacity= , you only use 3 of the pins, 2 in, 1 out. I think they are designed as rec= tifier, but are really good for putting 2 power supplies into 1 load.
=
Andrew

On Wed, 2= 8 Mar 2018 at 11:04 am, Todd Bartrim bartrim@gmail.com <flyrotary@lancaironline.net> wrote:=
Hi Andrew;
=C2=A0 Are you= suggesting that the EC2 has an internal diode bridge for this isolation fu= nction? I just checked and have 0.3 ohm between pins, indicating they are c= ommon internally. However I should mention my EC2 is an original model (ser= ial #315) and I believe Tracy may have changed a few things in later versio= ns. It has been updated but this is only for firmware and not hardware.
=C2=A0=C2=A0

<= div>Todd Bartrim

On Tue, Mar 27, 2018 at 7:53 PM, Andrew Mart= in andrew@marti= nag.com.au <flyrotary@lancaironline.net> wrote:
Todd, a diode bridge in betw= een allows 2 separate power feeds and keeps them isolated.
Andrew

On Wed, 28 Mar 2018 at 10:50 = am, Andrew Martin <andrew@martinag.com.au> wrote:

On Wed, 28 Mar 2018 at 1= 0:46 am, Todd Bartrim bartrim@gmail.com <flyrotary@lancaironline.net> wrote:
Has anyone provided redundant power sources = for their EC2?
=C2=A0 Currently I have power supplied via a circuit bre= aker, but I'm considering adding another power supply wire fed with a f= use.
However they would both still feed through pins 33 & 34 = which are internally connected. So even if I was to separate these pins for= there own feed (they are currently fed from the same wire), a short on eit= her one would likely cause both the fuse and CB to blow.=C2=A0
= =C2=A0 =C2=A0I'm just trying to take care of a last few things on my li= st before taking this plane up to the airport and something I'd added t= o the list many years ago was redundant power for the EC2 since a failure o= f that could really ruin my day.
=C2=A0 =C2=A0 Since the most lik= ely point of failure (even though it's quite unlikely) would be the DB3= 7 pin connector on the EC2, I'm not sure that it is worth the effort to= open up the connector shell to add another power wire.
=C2=A0 I&= #39;ve changed my mind on this several times over the last while and now I&= #39;m running low on time so I'd throw it out for the collective wisdom= of the group.

To= dd Bartrim=C2=A0 =C2=A0 (can't think of anything witty to sign off with= ) (I still miss Rusty's witt, for those that remember him)
C-FSTB
RV9 Turbo13B
--=C2=A0
--
Regards Andrew Martin Martin Ag

--
Regards Andrew Martin Martin Ag
--f4030435b7c42fb4490568708cb8--