X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qy0-f204.google.com ([209.85.221.204] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3682541 for flyrotary@lancaironline.net; Mon, 15 Jun 2009 01:04:35 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.221.204; envelope-from=wdleonard@gmail.com Received: by qyk42 with SMTP id 42so4425948qyk.7 for ; Sun, 14 Jun 2009 22:03:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=Sefdbvbeimx7GFLZTmyxrFOtzTZE9Ze/q2EVbQx+K7Q=; b=ewygXwzjcR39nKAdPuNM8LUt2j3yfw3SXke2W8hYyhgABks89meZvyxRxS20uk3dSM rzoikfuFtKRu7MhaikmMxoT/MfvhEbsh9og5al+lZU4FmMRsNiQG5cG8Qz3kCy2YYYxC TcWOzLpKdUT7uSUPyyK22F6hLTyjtUWyRN/i4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=x6Z3uhejnsPmJgiEycWxdMN1Lwt6+SPWkJyeN8/BCePV4wqBhPBWaKQs3slYhdYewl 60xU6wDxQ1hRAE5VUl3hH+Ma6TFHSrcvmcylkQaBLNf4X7qJb+J6xohwHcGH8MUQoVFR B3dhxK35BZHhnHJnrG79jP6kKCp/otVvnnTc8= MIME-Version: 1.0 Received: by 10.220.84.202 with SMTP id k10mr4268548vcl.77.1245042237454; Sun, 14 Jun 2009 22:03:57 -0700 (PDT) In-Reply-To: References: Date: Sun, 14 Jun 2009 22:03:57 -0700 Message-ID: <1c23473f0906142203v1d2acb42v194335d9e05930e0@mail.gmail.com> Subject: Re: [FlyRotary] Re: Over Voltage? From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e64652904b4856046c5bfcc2 --0016e64652904b4856046c5bfcc2 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Hi Al, Ed, Thanks for the input. It used to be in the low 14's and high 13's. Best I can remember. The vol= t meter never complained before, so I think this is something new. Will let you know how it goes. Dave Leonard On Sun, Jun 14, 2009 at 6:20 PM, Al Gietzen wrote: > Dave; > > > > What was your voltage reading a month ago? > > Voltage regulators due vary a bit from one to another. I probably have t= he > same alternator (Mitsubishi- 70), and for the first 130 hours or so it ra= n > 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=92s when I decid= ed to > replace the regulator. There=92s a re-build shop in Oceanside where I > bought the regulator for $38. Now it runs 14 =96 14.5. I think the actu= al 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 > =91crow-bar=92 over voltage protection. I don=92t think it trips until ab= out 18v. > > > > > What battery do you use? I found that my Odysee didn=92t seem unhappy > charging at 15. The higher charging voltage is mostly harder on the batte= ry. > > > > Al > > > > -----Original Message----- > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > 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 fli= ght > or two and see what it does? Is it possible that oil mist could have gum= med > 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 > --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net --0016e64652904b4856046c5bfcc2 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
Hi Al, Ed,
=A0
Thanks for the input.
=A0
It used to be in the low 14's and high 13's.=A0 Best I can rem= ember.=A0 The volt meter never complained before, so I think this is someth= ing new.=A0 Will let you know how it goes.
=A0
Dave Leonard

On Sun, Jun 14, 2009 at 6:20 PM, Al Gietzen <ALVentures@cox.net<= /a>> wrote:

Dave;

=A0

What was your voltage reading a= month ago?

Voltage regulators due vary a b= it from one to another.=A0 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). =A0Then it= began to slowly increase to where it was cycling over 15.5.=A0 That=92s wh= en I decided to replace the regulator.=A0 There=92s a re-build shop in Oceanside<= font face=3D"Verdana" color=3D"blue" size=3D"2"> where I bought the regulator for $= 38. =A0Now it runs 14 =96 14.5.=A0 I think the actual is about 1/2v lower a= s the EM2 reads that much higher then my voltmeter.

=A0

I modified the alternator so I = could provide external field with a =91crow-bar=92 over voltage protection.= I don=92t think it trips until about 18v.=A0

=A0

What battery do you use?=A0 I f= ound that my Odysee didn=92t seem unhappy charging at 15. The higher chargi= ng voltage is mostly harder on the battery.

=A0

Al

=A0

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

<= span style=3D"FONT-SIZE: 12pt">=A0

<= span style=3D"FONT-SIZE: 12pt">Today retuning from my flight my voltmeter s= tarted to complain "check voltage".=A0 The bus voltage was readin= g between 14.2 - 14.6 volts.=A0 Right after shut down the battery voltage w= as reading 13.3 volts.

<= span style=3D"FONT-SIZE: 12pt">=A0

<= span style=3D"FONT-SIZE: 12pt">Is this a sign of impending over voltage fai= lure of the regulator?=A0

<= span style=3D"FONT-SIZE: 12pt">I am using the stock 70 amp alternator.=A0 D= o I need to replace it right away?=A0 Use an external regulator?=A0 Is it s= afe to watch it for another flight or two and see what it does?=A0 Is it po= ssible that oil mist could have gummed things up a little and spraying some= contact cleaner into the alternator might do the trick?

<= span style=3D"FONT-SIZE: 12pt">=A0

<= span style=3D"FONT-SIZE: 12pt">How much voltage is too much before I need t= o land right away?

<= span style=3D"FONT-SIZE: 12pt">Thanks all.

<= span style=3D"FONT-SIZE: 12pt">
--
David Leonard

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




--
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
--0016e64652904b4856046c5bfcc2--