X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3682410 for flyrotary@lancaironline.net; Sun, 14 Jun 2009 20:20:26 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao107.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090615001950.IMYJ18948.fed1rmmtao107.cox.net@fed1rmimpo02.cox.net> for ; Sun, 14 Jun 2009 20:19:50 -0400 Received: from BigAl ([72.192.135.181]) by fed1rmimpo02.cox.net with bizsmtp id 40Kq1c0013uzsQg040KqtX; Sun, 14 Jun 2009 20:19:50 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=Ia-xEzejAAAA:8 a=N8B9JuSIAAAA:8 a=4JYnpcnoXqns6n1PBPsA:9 a=tICTZk-ySYdMOLUOewFccjsrRNAA:4 a=EzXvWhQp4_cA:10 a=wfaa4kJ7JBk9Ku6jZaYA:7 a=1gWHQ4u4-i8lI8jndla5Fkl7hjgA:4 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Over Voltage? Date: Sun, 14 Jun 2009 17:20:34 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0019_01C9ED14.6D23C780" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6838 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 In-Reply-To: Importance: Normal Thread-Index: AcntRuRFIrq/NZKhRkajlkxrYXH2gAADqb8g This is a multi-part message in MIME format. ------=_NextPart_000_0019_01C9ED14.6D23C780 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Dave; =20 What was your voltage reading a month ago? Voltage regulators due vary a bit from one to another. I probably have = the same alternator (Mitsubishi- 70), and for the first 130 hours or so it = ran in the range yours is now reading (according to the EM2). Then it began = to slowly increase to where it was cycling over 15.5. That's when I = decided to replace the regulator. There's a re-build shop in Oceanside where I = bought the regulator for $38. Now it runs 14 - 14.5. I think the actual is = about 1/2v lower as the EM2 reads that much higher then my voltmeter. =20 I modified the alternator so I could provide external field with a 'crow-bar' over voltage protection. I don't think it trips until about = 18v. =20 What battery do you use? I found that my Odysee didn't seem unhappy charging at 15. The higher charging voltage is mostly harder on the = battery. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard Sent: Sunday, June 14, 2009 3:21 PM To: Rotary motors in aircraft Subject: [FlyRotary] Over Voltage? =20 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. =20 Is this a sign of impending over voltage failure of the regulator? =20 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? =20 How much voltage is too much before I need to land right away? Thanks all. --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net ------=_NextPart_000_0019_01C9ED14.6D23C780 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Dave;

 

What was your voltage reading a = month ago?

Voltage regulators due vary a bit = from one to another.  I probably have the same alternator (Mitsubishi- 70), and for the first 130 hours or so it ran in the range = yours is now reading (according to the EM2).  Then it began to slowly = increase to where it was cycling over 15.5.  That’s when I decided to = replace the regulator.  There’s a re-build shop in = Oceanside where I bought the regulator for $38.  Now it runs 14 – = 14.5.  I think the actual is about 1/2v lower as the EM2 reads that much higher = then my voltmeter.

 

I modified the alternator so I = could provide external field with a ‘crow-bar’ over voltage = protection. I don’t think it trips until about 18v. 

 

What battery do you use?  I = found that my Odysee didn’t seem unhappy charging at 15. The higher = charging voltage is mostly harder on the battery.

 

Al

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of David Leonard
Sent: Sunday, June 14, = 2009 3:21 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Over = Voltage?

 

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

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