X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=L5hfeKb8 c=1 sm=1 tr=0 a=hLcLIkTLg2nAAMYxL9XpIw==:117 a=v2DPQv5-lfwA:10 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=eRLigfuSAAAA:8 a=fmSdRJ1BPrKgYOVyD00A:9 a=QEXdDO2ut3YA:10 a=9s6vYsF9hv5N4-195HwA:9 a=i3TMwHtewz07EXgF:21 a=Urk15JJjZg1Xo0ryW_k8:22 a=BfhXYjFvZD4iae-mNffo:22 From: "Andrew Martin andrew@martinag.com.au" Received: from mail-qt0-f180.google.com ([209.85.216.180] verified) by logan.com (CommuniGate Pro SMTP 6.2.2) with ESMTPS id 10880235 for flyrotary@lancaironline.net; Wed, 28 Mar 2018 00:41:50 -0400 Received-SPF: none receiver=logan.com; client-ip=209.85.216.180; envelope-from=andrew@martinag.com.au Received: by mail-qt0-f180.google.com with SMTP id w12so1259996qti.4 for ; Tue, 27 Mar 2018 21:41:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=martinag-com-au.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=IotEs+X9h2diZlBJz9wtbnAj5pCLUs4Km8no50tHT1g=; b=ELgqd02z0Nhd6y58GxBLbvRScvOLBsnyi1nDTbYe/BUAvIostcxGi689S15trMTnbR F9z25ZId65ObVNRVux3G5WFU5i3dMkRfQzjO4fqBn+xK7ebzmSceBIczfspreCh2G2pN fC45n0UC4l6gcBNoXwTQDEdnwhLfh5DlOtkINgq5qg1hhUK6RuMOlUmj7NQZUEY0zgQ1 7Gbk68VZOaJH2IBHrg9ximChZ25D0nx2aYNZCAObz7Je9Qx7/AHeB2CBvPlAcYujslLV koQvY/wzsamq4aLyjLZwR08c/67XzzheXM+JNyD1KkUty32mhM0ztsjt9r1isdZTIMyq 3j0A== 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=IotEs+X9h2diZlBJz9wtbnAj5pCLUs4Km8no50tHT1g=; b=azX0oBb524Mjs+Jr0LVWS/vcfJ5lNAlDjEvnxiJalnRt5kEnrNSvtHqu1nkzeSUBqr RW2SEO/koxpY/yGPoM1Yi7slK26KHNd3MQAbW+Lx11ZIsO8tUEF+YgmsrRz6GFB+Isnw vcRU1zo2r+hiEY1OpHTNcMPhVOK139LwULjgNO7Lz/OwRxNBA4idPQAItyyuljCg1jt5 tSFtg56F5IsANSPjpz91w48IuY4N/OCmTwI8QHW1zwgDqY+PWs1yFYU7cVbz2l7QfhOY BOEV8s4n1QDGopUPEnUoW+ZsHIZnkjS7dV3EpFukhexp6RaWSkr31dr+vd3RJjR7Lpxj HVeA== X-Gm-Message-State: ALQs6tCN3p/Z/gFagwyNvZMXHkTmuUOR/QqMQkghfU4LMwaZRw21GzdB WkAoEn+91xFjTIFdsmkofgu93wKVuivdM1I//OQb X-Google-Smtp-Source: AIpwx4+TnBfJJ7NTOtWbd6wwkpV+AJjwVLfjm9Nqo/Afd8l/S6e+gxTgu3YLK5lyOvxUtbiSGqcSycBQVIKXf65V88Q= X-Received: by 10.237.57.166 with SMTP id m35mr3024121qte.220.1522212095065; Tue, 27 Mar 2018 21:41:35 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Wed, 28 Mar 2018 04:41:24 +0000 Message-ID: Subject: Re: [FlyRotary] Re: back-up power for EC2 To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="001a1142c0743316530568719f24" --001a1142c0743316530568719f24 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Be careful if you decide to separate the Vin inside the ec2, I thought each pin in those plugs is only rated to 1a, so both need to supply power at all times. Andrew On Wed, 28 Mar 2018 at 11:37 am, Todd Bartrim bartrim@gmail.com < flyrotary@lancaironline.net> wrote: > 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 = use >> 3 of the pins, 2 in, 1 out. I think they are designed as rectifier, but = are >> 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 = is >>> an original model (serial #315) and I believe Tracy may have changed a = few >>> things in later versions. It has been updated but this is only for firm= ware >>> 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 keep= s >>>> 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 th= ere own >>>>>> feed (they are currently fed from the same wire), a short on either = one >>>>>> 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 >>>>>> 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 = of that >>>>>> 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 t= hat it >>>>>> is worth the effort to open up the connector shell to add another po= wer >>>>>> 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 w= isdom >>>>>> 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 >> > > -- Regards Andrew Martin Martin Ag --001a1142c0743316530568719f24 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Be careful if you decide to separate the Vin inside = the ec2, I thought each pin in those plugs is only rated to 1a, so both nee= d to supply power at all times.
Andrew

On Wed, 28 Mar 2018 at 11:37 am, Todd Bartrim <= a href=3D"mailto:bartrim@gmail.com">bartrim@gmail.com <flyrotary@lancaironline.net> wrote= :
Ah, yes. I understand you no= w. 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 la= nding lights with an alternate feed for a wigwag flasher.
=C2=A0 = 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=C2=A0 =C2=A0(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 Mart= in andrew@marti= nag.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 pr= etty sure 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 puttin= g 2 power supplies into 1 load.
Andrew

On W= ed, 28 Mar 2018 at 11:04 am, Todd Bartrim bartrim@gmail.com <flyrotary@lancaironline.net> w= rote:
Hi Andrew;
=C2=A0 Ar= e you suggesting that the EC2 has an internal diode bridge for this isolati= on function? I just checked and have 0.3 ohm between pins, indicating they = are common internally. However I should mention my EC2 is an original model= (serial #315) and I believe Tracy may have changed a few things in later v= ersions. It has been updated but this is only for firmware and not hardware= .
=C2=A0=C2=A0

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 We= d, 28 Mar 2018 at 10:46 am, Todd Bartrim bartrim@gmail.com <flyrotary@lancaironline.net> wr= ote:
Has anyone provided redun= dant power sources for their EC2?
=C2=A0 Currently I have power supplie= d via a circuit breaker, but I'm considering adding another power suppl= y wire fed with a fuse.
However they would both still feed throug= h pins 33 & 34 which are internally connected. So even if I was to sepa= rate these pins for there own feed (they are currently fed from the same wi= re), a short on either 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 fe= w things on my list before taking this plane up to the airport and somethin= g I'd added to the list many years ago was redundant power for the EC2 = since a failure of that could really ruin my day.
=C2=A0 =C2=A0 S= ince 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 that it is wo= rth the effort to open 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 Bartrim=C2=A0 =C2=A0 (can't thin= k of anything witty to sign off with) (I still miss Rusty's witt, for t= hose that remember him)

C-FSTB
RV9 Turbo= 13B
--=C2=A0
--
Regards Andrew Martin Martin Ag

--
Regards Andrew Martin Martin Ag

--
Regards Andrew Martin Martin Ag --001a1142c0743316530568719f24--