X-Virus-Scanned: clean according to Sophos on Logan.com
Return-Path: <rwstracy@gmail.com>
Received: from mail-qy0-f204.google.com ([209.85.221.204] verified)
  by logan.com (CommuniGate Pro SMTP 5.2.14)
  with ESMTP id 3682815 for flyrotary@lancaironline.net; Mon, 15 Jun 2009 09:57:40 -0400
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.221.204; envelope-from=rwstracy@gmail.com
Received: by qyk42 with SMTP id 42so4665071qyk.7
        for <flyrotary@lancaironline.net>; Mon, 15 Jun 2009 06:57:06 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=domainkey-signature:mime-version:sender:received:in-reply-to
         :references:date:x-google-sender-auth:message-id:subject:from:to
         :content-type;
        bh=Q4JmDy+DoS+ylvizHL8KcbHMXmHG93umePqsqMU6urY=;
        b=L/Qmf/56dUUiEjcWWlN3SfdQhWSN7jpS65kq0nuwpDgKSQylYeaXCdiUtcSF2gBYaT
         CLL7y1ZNevZHzG3F/HS1odzGyDmrTXj/vRkswScNxq3Sv9uiYJR7aEl6bbw3MfGDm5MZ
         6rC0X9hBwHKOstbYUhGLUPkDpYLIrwi5DEO3w=
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:sender:in-reply-to:references:date
         :x-google-sender-auth:message-id:subject:from:to:content-type;
        b=s66WFt2dLaDywiPG3NAyK6T84v17jSqfWqMIW9rA2+340LsGMrnfrCH38jrct49MlK
         KwAUgON1iFdvvHSj01jwbIXduUNftBnL99xX0A72jVbqzyDNWOS7JalsZIw2lQ6sPhyJ
         Qp4UGELq3m+9NqAfpViAaPokwRpiPjPAH1Uvw=
MIME-Version: 1.0
Sender: rwstracy@gmail.com
Received: by 10.224.54.5 with SMTP id o5mr7215734qag.54.1245074226474; Mon, 15 
	Jun 2009 06:57:06 -0700 (PDT)
In-Reply-To: <list-3682381@logan.com>
References: <list-3682381@logan.com>
Date: Mon, 15 Jun 2009 09:57:06 -0400
X-Google-Sender-Auth: 6cf55d505775bc03
Message-ID: <1b4b137c0906150657w63c7f4ect2e380d1f3f4be374@mail.gmail.com>
Subject: Re: [FlyRotary] Over Voltage?
From: Tracy Crook <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=0015175cde72fcef69046c636e7b

--0015175cde72fcef69046c636e7b
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

If a short term reading varied that much (14.2 - 14.6) I'd say that was
unstable but not an alarming reading.  I use 14.8 as a High alarm and 13.9
as a low alarm.  14.25 is my 'ideal' running point.  The instability is the
only thing out of the ordinary although I like the median reading to not go
above 14.5V.

BTW,  What WAS your usual reading?   CHANGE is often the important clue.

Tracy

On Sun, Jun 14, 2009 at 7:21 PM, David Leonard <wdleonard@gmail.com> wrote:

> Today retuning from my flight my voltmeter started to complain "check
> voltage".  The bus voltage was reading between 14.2 - 14.6 volts.  Right
> after shut down the battery voltage was reading 13.3 volts.
>
> Is this a sign of impending over voltage failure of the regulator?
> I am using the stock 70 amp alternator.  Do I need to replace it right
> away?  Use an external regulator?  Is it safe to watch it for another flight
> or two and see what it does?  Is it possible that oil mist could have gummed
> things up a little and spraying some contact cleaner into the alternator
> might do the trick?
>
> How much voltage is too much before I need to land right away?
> Thanks all.
>
> --
> David Leonard
>
> Turbo Rotary RV-6 N4VY
> http://N4VY.RotaryRoster.net
> http://RotaryRoster.net
>

--0015175cde72fcef69046c636e7b
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

If a short term reading varied that much (14.2 - 14.6) I&#39;d say that was=
 unstable but not an alarming reading.=A0 I use 14.8 as a High alarm and 13=
.9 as a low alarm.=A0 14.25 is my &#39;ideal&#39; running point.=A0 The ins=
tability is the only thing out of the ordinary although I like the median r=
eading to not go above 14.5V.=A0=A0 <br>
<br>BTW,=A0 What WAS your usual reading?=A0=A0 CHANGE is often the importan=
t clue.<br><br>Tracy<br><br><div class=3D"gmail_quote">On Sun, Jun 14, 2009=
 at 7:21 PM, David Leonard <span dir=3D"ltr">&lt;<a href=3D"mailto:wdleonar=
d@gmail.com">wdleonard@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204, =
204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>Today retuni=
ng from my flight my voltmeter started to complain &quot;check voltage&quot=
;.=A0 The bus voltage was reading between 14.2 - 14.6 volts.=A0 Right after=
 shut down the battery voltage was reading 13.3 volts.</div>


<div>=A0</div>
<div>Is this a sign of impending over voltage failure of the regulator?=A0 =
</div>
<div>I am using the stock 70 amp alternator.=A0 Do I need to replace it rig=
ht away?=A0 Use an external regulator?=A0 Is it safe to watch it for anothe=
r flight or two and see what it does?=A0 Is it possible that oil mist could=
 have gummed things up a little and spraying some contact cleaner into the =
alternator might do the trick?</div>


<div>=A0</div>
<div>How much voltage is too much before I need to land right away?</div>
<div>Thanks all.</div>
<div></div><br><font color=3D"#888888">-- <br>David Leonard<br><br>Turbo Ro=
tary RV-6 N4VY<br><a href=3D"http://N4VY.RotaryRoster.net" target=3D"_blank=
">http://N4VY.RotaryRoster.net</a><br><a href=3D"http://RotaryRoster.net" t=
arget=3D"_blank">http://RotaryRoster.net</a><br>

</font></blockquote></div><br>

--0015175cde72fcef69046c636e7b--