X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-fx0-f206.google.com ([209.85.220.206] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3682804 for flyrotary@lancaironline.net; Mon, 15 Jun 2009 09:47:02 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.206; envelope-from=msteitle@gmail.com Received: by fxm2 with SMTP id 2so1708933fxm.19 for ; Mon, 15 Jun 2009 06:46:28 -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=IAubtI0B0vmbBAvuIxKHeU5q0gRRAWc/k+Hc2mQanSk=; b=Rp2RaDMx52oXy2KZ51gprnMYKGBCX2JQ3sVGadd/NKCnTjEVNcya3xDtDU9m9vP82a pV6LTdLNd1B+27DJpzU4KfHy2qvltNkVKafVsBhj5vawMCGTPery+OJtPBVesGX9aClp ccsL4x7DRUgSHZRgrkV8EEmLQTqmTLoBt+KLM= 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=ZaXz92Ysd3PA1cMJ5PKLyBoOZ/IIEZXqpAx5+8dyNLprw9+gTa+JtIxrpoNIcV4CSf Bt2UTpgcAsBWPc3F28jKEuNmVoU7uXNp7265KPTZ0o35aQLyPFtG74M1Ufqz4fr/1son C7dAR6haJzEGXVZpudR4ix47idz603QBiYXj4= MIME-Version: 1.0 Received: by 10.204.119.71 with SMTP id y7mr7133540bkq.16.1245073587298; Mon, 15 Jun 2009 06:46:27 -0700 (PDT) In-Reply-To: References: Date: Mon, 15 Jun 2009 08:46:26 -0500 Message-ID: <5cf132c0906150646p6f695378s4dab0a979745e64d@mail.gmail.com> Subject: Re: [FlyRotary] Re: Over Voltage? From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e6d59e1fe447ad046c6348d9 --0016e6d59e1fe447ad046c6348d9 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Dave, I converted my ND alternators to external regulators. I wrote an article on how to do it. But since you have the Mazda 70 amp unit, that won't be of much help. There was an article in Contact Magazine years back on how to convert Mitsubishi alternators from internally regulated to externally regulated. I think you can still get copies of old issues from their web site. Mark On Mon, Jun 15, 2009 at 7:27 AM, David Leonard wrote: > Thanks Todd, > > I guess I really shoud get around to doing that. Seems to me that I > remember the all the parts for a crow-bar system being about $300. Is that > not the case? I have already modified my alternator so that if I shut off > the b-field I can shut down the alternator - do I need to make further > internal modifications to the alternaror to use an external regulator? > > Dave > > On Sun, Jun 14, 2009 at 11:36 PM, Todd Bartrim wrote: > >> Hey Dave; >> I had a stock alternator internal regulator fail high and as best I >> can remember it was always charging ~14.x volts previous to failure. I was >> lucky in that I was just taxing up to the hanger when I saw it at ~19volts >> and climbing so I quickly shut down. >> When designing my system I'd read all of Electric Bob's warning about >> internal regulation, but I just figured that I'd never had a problem in all >> my years of driving so what were the odds? Not much, yeah right. When I went >> to buy a replacement, I found it was going to cost ~$40 and it wasn't in >> stock and would have to be ordered, but for $8 I could buy the Ford external >> regulator that Bob recommends and they had at least a dozen in stock. So I >> built the crow-bar circuit that Bob recommends and I converted my alternator >> to an external regulation (pretty easy to do) >> Glad I did it, even though I'm not exactly putting up the hours now. >> Maybe you don't have a regulation issue, but if you do , you might >> want to consider converting. >> >> Todd (almost finished Harley generator install, pics coming soon) >> >> >> On Sun, 2009-06-14 at 16:21 -0700, David Leonard 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 >> >> > > > -- > David Leonard > > Turbo Rotary RV-6 N4VY > http://N4VY.RotaryRoster.net > http://RotaryRoster.net > --0016e6d59e1fe447ad046c6348d9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Dave,
=A0
I converted my ND alternators to external regulators.=A0 I wrote an ar= ticle on how to do it.=A0 But since you have the Mazda 70 amp unit, that wo= n't be of much help.
=A0
There was an article in Contact Magazine years back on how to convert= =A0Mitsubishi alternators from internally regulated to externally regulated= .=A0 I think you can still get copies of old issues from their web site.=A0=
=A0
Mark

On Mon, Jun 15, 2009 at 7:27 AM, David Leonard <= span dir=3D"ltr"><wdleonard@gmail= .com> wrote:
Thanks Todd,
=A0
I guess I really shoud get around to doing that.=A0 Seems to me that I= remember the all the parts for a crow-bar system being about $300.=A0=A0 I= s that not the case?=A0 I have already modified my alternator so that if I = shut off the b-field I can shut down the alternator - do I need to make fur= ther internal modifications to the alternaror to use an external regulator?=
=A0
Dave

On Sun, Jun 14, 2009 at 11:36 PM, Todd Bartrim <= span dir=3D"ltr"><bartrim@gmail.com> wrote:
Hey Dave;
=A0=A0=A0 I had a stock alternator internal regulator fai= l high and as best I can remember it was always charging ~14.x volts previo= us to failure. I was lucky in that I was just taxing up to the hanger=A0 wh= en I saw it at ~19volts and climbing so I quickly shut down.
=A0=A0=A0 When designing my system I'd read all of Electric Bob's w= arning about internal regulation, but I just figured that I'd never had= a problem in all my years of driving so what were the odds? Not much, yeah= right. When I went to buy a replacement, I found it was going to cost ~$40= and it wasn't in stock and would have to be ordered, but for $8 I coul= d buy the Ford external regulator that Bob recommends and they had at least= a dozen in stock. So I built the crow-bar circuit that Bob recommends and = I converted my alternator to an external regulation (pretty easy to do)
Glad I did it, even though I'm not exactly putting up the hours now.=A0=A0=A0 Maybe you don't have a regulation issue, but if you do , you= might want to consider converting.

Todd=A0=A0=A0 (almost finished H= arley generator install, pics coming soon)


On Sun, 2009-06-14 at 16:21 -0700, Da= vid Leonard wrote:=20
Today retuning from my flight my voltmeter starte= d to complain "check voltage".=A0 The bus voltage was reading bet= ween 14.2 - 14.6 volts.=A0 Right after shut down the battery voltage was re= ading 13.3 volts.
=A0
Is this a sign of impending over voltage failure = of the regulator?=A0
I am using the stock 70 amp alternator.=A0 Do I n= eed to replace it right away?=A0 Use an external regulator?=A0 Is it safe t= o watch it for another flight or two and see what it does?=A0 Is it possibl= e that oil mist could have gummed things up a little and spraying some cont= act cleaner into the alternator might do the trick?
=A0
How much voltage is too much before I need to lan= d right away?
Thanks all.


--
David Leonard

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



--
David Leonard

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

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