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Date: Mon, 15 Jun 2009 08:35:34 -0700
Message-ID: <1c23473f0906150835y264c1c48kb200c2196b6c51ea@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Over Voltage? - double regulation?
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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As I remember, it seemed to be between 14.0 to 14.4, but I must admit that I
never really paid much attention to the exact value, as long as it was
somewhere around 14.    With my F-field modified to for external switching,
can I just add the ford regulator to the F-field?  that would have it sort
of 'double regluated'..  will that work?

Dave Leonard

On Mon, Jun 15, 2009 at 6:57 AM, Tracy Crook <tracy@rotaryaviation.com>wrote:

> 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://n4vy.rotaryroster.net/>
>> http://RotaryRoster.net <http://rotaryroster.net/>
>>
>
>


-- 
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

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<div>As I remember, it seemed to be between 14.0 to 14.4, but I must admit =
that I never really paid much attention to the exact value, as long as it w=
as somewhere around 14.=A0=A0=A0 With my F-field modified to for external s=
witching, can I just add the ford regulator to the F-field?=A0 that would h=
ave it sort of &#39;double regluated&#39;..=A0 will that work?</div>

<div>=A0</div>
<div>Dave Leonard<br><br></div>
<div class=3D"gmail_quote">On Mon, Jun 15, 2009 at 6:57 AM, Tracy Crook <sp=
an dir=3D"ltr">&lt;<a href=3D"mailto:tracy@rotaryaviation.com">tracy@rotary=
aviation.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">If a short term reading varied t=
hat much (14.2 - 14.6) I&#39;d say that was unstable but not an alarming re=
ading.=A0 I use 14.8 as a High alarm and 13.9 as a low alarm.=A0 14.25 is m=
y &#39;ideal&#39; running point.=A0 The instability is the only thing out o=
f the ordinary although I like the median reading 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><font color=3D"#888888"><br>Tracy</font>=20
<div>
<div></div>
<div class=3D"h5"><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:wdleonard@gmail.com" target=3D"_blan=
k">wdleonard@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0pt 0=
pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<div>Today retuning from my flight my voltmeter started to complain &quot;c=
heck voltage&quot;.=A0 The bus voltage was reading between 14.2 - 14.6 volt=
s.=A0 Right after shut down the battery voltage was reading 13.3 volts.</di=
v>

<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"_blan=
k">http://N4VY.RotaryRoster.net</a><br><a href=3D"http://rotaryroster.net/"=
 target=3D"_blank">http://RotaryRoster.net</a><br>
</font></blockquote></div><br></div></div></blockquote></div><br><br clear=
=3D"all">
<div></div><br>-- <br>David Leonard<br><br>Turbo Rotary RV-6 N4VY<br><a hre=
f=3D"http://N4VY.RotaryRoster.net">http://N4VY.RotaryRoster.net</a><br><a h=
ref=3D"http://RotaryRoster.net">http://RotaryRoster.net</a><br>

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