X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from m15.nyc.untd.com ([64.136.22.78] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with SMTP id 718046 for flyrotary@lancaironline.net; Sat, 10 Sep 2005 21:59:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.22.78; envelope-from=jbker@juno.com Received: from m15.nyc.untd.com (localhost [127.0.0.1]) by m15.nyc.untd.com with SMTP id AABBUHD3BALU575S for (sender ); Sat, 10 Sep 2005 18:57:53 -0700 (PDT) Received: (from jbker@juno.com) by m15.nyc.untd.com (jqueuemail) id K4K5GXMU; Sat, 10 Sep 2005 18:57:32 PDT To: flyrotary@lancaironline.net Date: Sat, 10 Sep 2005 21:54:47 -0400 Subject: Re: [FlyRotary] Re: Overvoltage control (help Ed A) Message-ID: <20050910.215448.1908.16.JBKER@juno.com> X-Mailer: Juno 5.0.33 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=--__JNP_000_1a9b.0890.377e X-Juno-Line-Breaks: 8-6,7-10,16-19,24-25,28-29,30-32767 From: WALTER B KERR X-ContentStamp: 7:3:2772793851 X-UNTD-OriginStamp: Y+Mfppm2QyGfnY/dq+iW1QG6aED2QEojrttDGChyXlMrB54KQLxrOg== X-UNTD-Peer-Info: 127.0.0.1|localhost|m15.nyc.untd.com|jbker@juno.com This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_1a9b.0890.377e Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Jim Sower wrote: If my crowbar overvoltage opens the B+ circuit, there's NO current flowing out of the alternator. Absent current, there can be no heat generated. The field can go to max output, there will be high voltage at the B+ terminal, but no heat generated. Sounds to me like a bogus concern. I think the key issue is "... Nuckolls expressed dislike ..." and no further support is "needed". ================================================ Jim, I've been flying unprotected but thinking I really need to something for safety sake. Ordered one of Nuckolls OVM-14's and planned to put it in with a B+ line contactor. Now you have me thinking that I may introduce more failure modes than I had before. I am a real advocate of KISS systems. Do you or anyone else on the list know what happens to recombinant gas batteries like the Odessey do when they are overcharged by say the 16-18 volts that you think happens when the alternator regulator fails?? Bernie ----__JNP_000_1a9b.0890.377e Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable

Jim Sower wrote:

If my crowbar overvoltage opens the B+ = circuit,=20 there's NO current flowing out of the alternator.  Absent = current,=20 there can be no heat generated.  The field can go to max output,= =20 there will be high voltage at the B+ terminal, but no heat=20 generated.  Sounds to me like a bogus concern.  I think the= key=20 issue is "... Nuckolls expressed dislike ..." and no further support = is=20 "needed".

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D
Jim, I've been flying unprotected but thinking I really need to=20 something for safety sake. Ordered one of Nuckolls OVM-14's and planned= to=20 put it in with a B+ line contactor. Now you have me thinking that I may= =20 introduce more failure modes than I had before. I am a real advocate of= KISS=20 systems.
 
Do you or anyone else on the list know what happens to recombinant= gas=20 batteries like the Odessey do when they are overcharged by say the 16-= 18=20 volts that you think happens when the alternator regulator fails??
 
Bernie



 
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