From: "Andrew Martin andrew@martinag.com.au" <flyrotary@lancaironline.net>
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Date: Wed, 28 Mar 2018 02:50:29 +0000
Message-ID: <CAJxaVD2YBnvMopnTZdwO5MYX_L59kfvOeJXHDdxmy_mEccB+ow@mail.gmail.com>
Subject: Re: [FlyRotary] back-up power for EC2
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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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 there 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 to 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 that it
> is worth the effort to open up the connector shell to add another power
> 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 wisdom 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

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<div><br><div class=3D"gmail_quote"><div>On Wed, 28 Mar 2018 at 10:46 am, T=
odd Bartrim <a href=3D"mailto:bartrim@gmail.com">bartrim@gmail.com</a> &lt;=
<a href=3D"mailto:flyrotary@lancaironline.net">flyrotary@lancaironline.net<=
/a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>Has anyone prov=
ided redundant power sources for their EC2?<div>=C2=A0 Currently I have pow=
er supplied via a circuit breaker, but I&#39;m considering adding another p=
ower supply wire fed with a fuse.</div><div>However they would both still f=
eed through pins 33 &amp; 34 which are internally connected. So even if I w=
as to separate these pins for there own feed (they are currently fed from t=
he same wire), a short on either one would likely cause both the fuse and C=
B to blow.=C2=A0</div><div>=C2=A0 =C2=A0I&#39;m just trying to take care of=
 a last few things on my list before taking this plane up to the airport an=
d something I&#39;d added to the list many years ago was redundant power fo=
r the EC2 since a failure of that could really ruin my day.</div><div>=C2=
=A0 =C2=A0 Since the most likely point of failure (even though it&#39;s qui=
te unlikely) would be the DB37 pin connector on the EC2, I&#39;m not sure t=
hat it is worth the effort to open up the connector shell to add another po=
wer wire.</div><div>=C2=A0 I&#39;ve changed my mind on this several times o=
ver the last while and now I&#39;m running low on time so I&#39;d throw it =
out for the collective wisdom of the group.</div><div><br></div><div><div><=
div class=3D"m_3633150888657227628gmail_signature" data-smartmail=3D"gmail_=
signature"><div>Todd Bartrim=C2=A0 =C2=A0 (can&#39;t think of anything witt=
y to sign off with) (I still miss Rusty&#39;s witt, for those that remember=
 him)</div><div><br></div><div>C-FSTB</div><div>RV9 Turbo13B</div></div></d=
iv>
</div></div>
</blockquote></div></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" =
data-smartmail=3D"gmail_signature">Regards
Andrew Martin
Martin Ag</div>

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