X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost04.isp.att.net ([204.127.217.104] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3745147 for flyrotary@lancaironline.net; Sat, 04 Jul 2009 18:52:56 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.104; envelope-from=keltro@att.net DKIM-Signature: v=1; q=dns/txt; d=att.net; s=dkim01; i=keltro@att.net; a=rsa-sha256; c=relaxed/relaxed; t=1246747974; h=Content-Type: MIME-Version:In-Reply-To:Message-Id:Date:Subject:To:From; bh=6g5jed 4j7iWwF777wDWD/TzSMVQc9XTWRzwq63iABRk=; b=iuJ03gx+Mzz12H0cY5nP6FvMA Fb54ZK4pEhrl+TrdqdFJDbwZxt1Iohh6jAqTrTioNiIlritLHj5tdg+5/2TaA== Received: from fwebmail13.isp.att.net ([207.115.9.153]) by isp.att.net (frfwmhc04) with SMTP id <20090704225218H0400hfj2oe>; Sat, 4 Jul 2009 22:52:18 +0000 X-Originating-IP: [207.115.9.153] Received: from [65.255.68.159] by fwebmail13.isp.att.net; Sat, 04 Jul 2009 22:52:18 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Modify Alternator for External Regulator Date: Sat, 04 Jul 2009 22:52:18 +0000 Message-Id: <070420092252.26898.4A4FDD220001EE600000691222218683269B0A02D29B9B0EBF019D9B040A05@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Mar 2 2009) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_26898_1246747938_0" --NextPart_Webmail_9m3u9jl4l_26898_1246747938_0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Ed, Does this mean you have no means to shut down your alternator if you have= regulator=20 failure and voltage were to go wild (admittedly does not happen often) ??..= ................... Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from "Ed Anderson" : --------------=20 George, =20 Most aircraft alternators had the ability to kill output from the alternato= r by removing voltage to the field coils of the alternator. However, most = all automobile alternators need only the initial battery voltage to the fi= eld coils to start producing voltage. Once started, removing voltage from = the field coils WILL NOT shut down the alternator. =20 I discovered this myself. If I start the engine with the alternator field = coil Circuit breaker in =E2=80=93 then the alternator produces voltage as e= xpected. However, I found when I pulled the alternator field coil CB AFTER= the alternator started producing voltage =E2=80=93 I could not shut it dow= n. If I started the engine with the CB pulled then the alternator never st= arted to produce voltage. However, I am told that in some alternators ther= e is sufficient magnetism retain in the metal that they can start producing= voltage as soon as they are spinning.=20 =20 So a number of folks modify auto alternators ( I think they are just as goo= d and a whole lot cheaper) to remove the ability of the alternator to get v= oltage for its field coils internally. Then the put a CB in the field coil= voltage line and can shut down the alternator at any time. =20 I do not have this mod as I=E2=80=99ve never had an alternator do anything = but fail to produce sufficient voltage, but it appears there have been case= s where the alternator ran wild and produced high voltage sufficient to da= mage equipment. Naturally you don=E2=80=99t want this in an aircraft , so = the best of both worlds is to buy a good quality automobile alternator and = modify it. A number of folks have successfully done this. My personal exp= erience has led me to leave the alternator as it is and so far that has wor= ked fine for me. =20 Ed =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of George Lendich Sent: Saturday, July 04, 2009 5:57 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Modify Alternator for External Regulator =20 Kelly, Say again, why some opt for an external regulator? George (down under) Chris, Al , Group, Here is link for modifying the stock Mazda alternator for an externa= l regulator.......... =20 http://home.earthlink.net/~timrv6a/alternator.htm Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 =20 -------------- Original message from "Al Gietzen" : ---= -----------=20 > Chris wrote:=20 > I am running the expensive B&C regulators on both systems with=20 > the stock alternators with the internal regulators disabled.=20 > -----------=20 >=20 > The question that flashes into my mind is "how did you disable the intern= al=20 > regulator?"=20 > Opening the internal connection from the output that normally powers the= =20 > regulator does not keep the regulator from operating. I'm just wondering = if=20 > there is some issue with your external regulator maybe providing the fiel= d=20 > current to the internal regulator. Perhaps worth re-evaluating that setup= .=20 >=20 > Al=20 >=20 >=20 > --=20 > Homepage: http://www.flyrotary.com/=20 > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.= html=20 __________ Information from ESET NOD32 Antivirus, version of virus signatur= e database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com --NextPart_Webmail_9m3u9jl4l_26898_1246747938_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_26898_1246747938_1" --NextPart_Webmail_9m3u9jl4l_26898_1246747938_1 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Ed,
  Does this mean you have no means to shut down your alterna= tor if you have regulator
failure and voltage were to go wild (admittedly does not happen o= ften) ??.....................

Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2= /EM2
"Mistral"_Backplate/Oil Manifold



 
-------------- Original message from "Ed Anderson" <eande= rson@carolina.rr.com>: --------------

George,

 

Most aircraft alterna= tors had the ability to kill output from the alternator by removing voltage= to the field coils of the alternator.  However, most all automobile a= lternators need only the initial  battery voltage to the field coils t= o start producing voltage.  Once started, removing voltage from the fi= eld coils WILL NOT  shut down the alternator.=

 

I discovered this mys= elf.  If I start the engine with the alternator field coil Circuit bre= aker in =E2=80=93 then the alternator produces voltage as expected.  H= owever, I found when I pulled the alternator field coil CB AFTER the altern= ator started producing voltage =E2=80=93 I could not shut it down.  If= I started the engine with the CB pulled then the alternator never started = to produce voltage.  However, I am told that in some alternators there= is sufficient magnetism retain in the metal that they can start producing = voltage as soon as they are spinning.

 

So a number of folks = modify auto alternators ( I think they are just as good and a whole lot che= aper) to remove the ability of the alternator to get voltage for its field = coils internally.  Then the put a CB in the field coil voltage line an= d can shut down the alternator at any time.

 

I do not have this mo= d as I=E2=80=99ve never had an alternator do anything but fail to produce s= ufficient voltage, but it appears there have been cases where the alternato= r ran wild and produced high voltage sufficient  to damage equipment.&= nbsp; Naturally you don=E2=80=99t want this in an aircraft , so the best of= both worlds is to buy a good quality automobile alternator and modify it.&= nbsp; A number of folks have successfully done this.  My personal expe= rience has led me to leave the alternator as it is and so far that has work= ed fine for me.

 

Ed<= /FONT>

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of George Lendich
Sent: Saturday, July 04, 2009 5:57 PM
To: Rot= ary motors in aircraft
Subject: [FlyRotary] Re: Modify Alternator for External Reg= ulator

 

Kelly,

Say again, why some opt for an external regulator= ?

George (down under)

<= /DIV>

Chris, Al , Group,

       Here is link for mod= ifying the stock Mazda alternator for an external regulator..........<= /o:p>

 

    &nb= sp;   http://home.earthlink.net/~timrv6a/alternator.htm
Kelly Troyer
"Dyke Delta"_13B ROTARY Engi= ne
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold


=

 

-------------- Original message from "Al Gietzen" <ALV= entures@cox.net>: --------------


> Chris wrote:
> = I am running the expensive B&C regulators on both systems with
>= the stock alternators with the internal regulators disabled.
> ----= -------
>
> The question that flashes into my mind is "how di= d you disable the internal
> regulator?"
> Opening the intern= al connection from the output that normally powers the
> regulator d= oes not keep the regulator from operating. I'm just wondering if
> t= here is some issue with your external regulator maybe providing the field <= BR>> current to the internal regulator. Perhaps worth re-evaluating that= setup.
>
> Al
>
>
> --
> Homepag= e: http://www.flyrotary.com/
> Archive and UnSub: http://mail.lancai= ronline.net:81/lists/flyrotary/List.html



__________ Informa= tion from ESET NOD32 Antivirus, version of virus signature database 3267 (2= 0080714) __________

The message was checked by ESET NOD32 Antivirus.=

http://www.eset.com=

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