X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=L5hfeKb8 c=1 sm=1 tr=0 a=Juw55/qJAg8gbbUt08BnDg==:117 a=x7bEGLp0ZPQA:10 a=xXDCcK6TKBsA:10 a=v2DPQv5-lfwA:10 a=eRLigfuSAAAA:8 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=8mpmsscFTeur7X-etLEA:9 a=QEXdDO2ut3YA:10 a=9s6vYsF9hv5N4-195HwA:9 a=1SZAFsHYqO8wIYUK:21 a=BfhXYjFvZD4iae-mNffo:22 a=Urk15JJjZg1Xo0ryW_k8:22 From: "Todd Bartrim bartrim@gmail.com" Received: from mail-wm0-f52.google.com ([74.125.82.52] verified) by logan.com (CommuniGate Pro SMTP 6.2.2) with ESMTPS id 10880198 for flyrotary@lancaironline.net; Tue, 27 Mar 2018 23:37:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.82.52; envelope-from=bartrim@gmail.com Received: by mail-wm0-f52.google.com with SMTP id v21so2231247wmc.1 for ; Tue, 27 Mar 2018 20:37:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=3cYbqYGvLE016d0J8/wuLGIx60m7PTSBKPojJlJpWx8=; b=kjdx5TXTRsqDCWkCupbtrPqn0uiwy+BlsS+t3SSXEJJuEJP/5SfPOGUj98A1lW0PX0 50B0cG8s2KqysiY+T6mrjT+fSjD3Ut78BGajHP77p0vwZog/BVZdh+Imf2YMCqmsqJXi h82esvv/bL/pY2iEFRDEOUt3dUXKwX/1Z70BR8rugCCD04JxDb7yJwVuAtR4uo9lRmbf Wl3R0M86NzqThqMrfRuIqxoaDV9fMeK2hqdI2X5HOwdELt2e+9gt1gMPdBy1Tzxg6cMX PA5o45krSXZ8YxYRXV5fP9uj5i76Lf5S9SOwGkI9dQNZbn8LKf+UW1QcrG1ogzqx9bab MU4w== 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=3cYbqYGvLE016d0J8/wuLGIx60m7PTSBKPojJlJpWx8=; b=g+mkLH93LFE6JqkN6zhj31dGMPDzGOeci8TlwrXalmjHv+4FSnKBvF3emttvO0St8m AjCIaMZlmcnw6Keo0+RRQlVfdw/L++7HAdY+UOdTcwd7RhRqpBPtTJV+TMe/7b8108h6 sSH2MSdVNIlTEYlw690a6NMM54h9M7RoReNp7v4LfJZa+nUY0azCYLiQzJK4ypIYdJ2e AaFNQghpwhY1PjGqGhfM7HMO/LCNY3MW7cfXUeGO2+H+3UUH/Ct8otRipV5fF7xxsf+P Ockrz6mVB7G4+PIYBpDhGC8D9VJ5gs3jwB1tGK9lONeHCC3DT3M6EZf+lfw32ZFUxp6W zIfg== X-Gm-Message-State: AElRT7EIh6vhB+y42/UqnfdqIt9vF8mAdiobjzi5CUtHf0EKvfywRkVj C+C7niM61e/Ob5dx2Pb/hMwmer5FvzzvFDaLdQ== X-Google-Smtp-Source: AIpwx49iiZ+P+pIC9l90QW6NwsbDZORGp5yvJvJti0ki5GZWJXYNHNI9B6v7+076c5xraaNiEtSnZ96TkNICGZObvow= X-Received: by 10.80.170.214 with SMTP id r22mr1544163edc.309.1522208224486; Tue, 27 Mar 2018 20:37:04 -0700 (PDT) MIME-Version: 1.0 Received: by 10.80.135.214 with HTTP; Tue, 27 Mar 2018 20:37:03 -0700 (PDT) In-Reply-To: References: Date: Tue, 27 Mar 2018 20:37:03 -0700 Message-ID: Subject: Re: [FlyRotary] Re: back-up power for EC2 To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="94eb2c1990fe7ea7f8056870b84b" --94eb2c1990fe7ea7f8056870b84b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Ah, yes. I understand you now. I've used them myself in the past. I used on to isolate my endurance buss from the main buss. Just looked at your link and yeah, thats the same idea. I never used the heatsink though. Also used one to wire up my landing lights with an alternate feed for a wigwag flasher. I think at work I probably have in my spare parts bin several large diodes as well. Yes, that should be fairly easy to accomplish. Thanks. Anybody else have any comments? Tomorrow... Todd (everybody back east is in bed already, while they're just getting up down under) Todd Bartrim On Tue, Mar 27, 2018 at 8:12 PM, 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 > --94eb2c1990fe7ea7f8056870b84b Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Ah, yes. I understand you now. I've used them myself i= n the past. I used on to isolate my endurance buss from the main buss.
= Just looked at your link and yeah, thats the same idea. I never used the he= atsink though. Also used one to wire up my landing lights with an alternate= feed for a wigwag flasher.
=C2=A0 I think at work I probably hav= e in my spare parts bin several large diodes as well.
Yes, that s= hould be fairly easy to accomplish.

Thanks. Anybod= y else have any comments? Tomorrow...

Todd=C2=A0 = =C2=A0(everybody back east is in bed already, while they're just gettin= g up down under)

Todd Bartrim

On Tue, Mar 27, 2018 at 8:12 PM, Andrew Mart= in 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 s= ure they are about 25a capacity, you only use 3 of the pins, 2 in, 1 out. I= think they are designed as rectifier, but are really good for putting 2 po= wer supplies into 1 load.
Andrew

On Wed, 28 Mar 2018 at 11:04 a= m, Todd Bartrim bart= rim@gmail.com <flyrotary@lancaironline.net> wrote:
Hi Andrew;
=C2=A0 Are you suggesting that the = EC2 has an internal diode bridge for this isolation function? I just checke= d and have 0.3 ohm between pins, indicating they are common internally. How= ever I should mention my EC2 is an original model (serial #315) and I belie= ve Tracy may have changed a few things in later versions. It has been updat= ed but this is only for firmware and not hardware.
=C2=A0=C2=A0

Todd Bartrim
<= /div>

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 a= m, Andrew Martin <andrew@martinag.com.au> 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 f= or their EC2?
=C2=A0 Currently I have power supplied via a circuit brea= ker, but I'm considering adding another power supply wire fed with a fu= se.
However they would both still feed through pins 33 & 34 w= hich 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 eith= er 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 list = before taking this plane up to the airport and something I'd added to t= he list many years ago was redundant power for the EC2 since a failure of t= hat could really ruin my day.
=C2=A0 =C2=A0 Since the most likely= point of failure (even though it's quite unlikely) would be the DB37 p= in connector on the EC2, I'm not sure that it is worth the effort to op= en up the connector shell to add another power wire.
=C2=A0 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 wisdom of= the group.

Todd B= artrim=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

--
R= egards Andrew Martin Martin Ag

--94eb2c1990fe7ea7f8056870b84b--