X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao10.cox.net ([68.230.241.29] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 716159 for flyrotary@lancaironline.net; Thu, 08 Sep 2005 18:56:39 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.29; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao10.cox.net (InterMail vM.6.01.05.02 201-2131-123-102-20050715) with ESMTP id <20050908225554.BDAP3414.fed1rmmtao10.cox.net@BigAl> for ; Thu, 8 Sep 2005 18:55:54 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Overvoltage control Date: Thu, 8 Sep 2005 15:55:54 -0700 Message-ID: <000001c5b4c8$7815f150$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C5B48D.CBB71950" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C5B48D.CBB71950 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 Ed, I wrote up step-by-step instructions a while back on converting an ND alternator from internal regulator to external. If anyone is = interested, let me know and I will send it to them directly. This conversion makes = it so that you can shut the thing down by cutting the power to the field = wire as is the method used by the Perihelion Design OVM. =20 =20 Note that it is not necessary to go from 'internal' regulator, to = 'external' regulator. The internal voltage regulator gets its feed for the field current directly from the alternator output. You can still use the = internal regulator, you just have to 'break' the internal connection from the alternator output to the regulator. No other parts required. =20 This was written up in CONTACT! magazine years ago, and if I'm forced = (well, actually if anyone is interested) I will see if I can dig it up. =20 Al =20 =20 ------=_NextPart_000_0001_01C5B48D.CBB71950 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

 

Ed,=

I wrote up = step-by-step instructions a while back on converting an ND alternator from internal regulator to external.  If anyone is interested, let me know and I = will send it to them directly.  This conversion makes it so that you can = shut the thing down by cutting the power to the field wire as is the method = used by the Perihelion Design OVM. 

 

Note that it is not necessary to = go from ‘internal’ regulator, to ‘external’ regulator. =  The internal voltage regulator gets its feed for the field current directly = from the alternator output.  You can still use the internal regulator, = you just have to ‘break’ the internal connection from the alternator = output to the regulator.  No other parts required.

 

This was written up in CONTACT! = magazine years ago, and if I’m forced (well, actually if anyone is = interested) I will see if I can dig it up.

 

Al

 

 

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