X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from relay01.roc.ny.frontiernet.net ([66.133.182.164] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 718131 for flyrotary@lancaironline.net; Sun, 11 Sep 2005 01:36:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.133.182.164; envelope-from=canarder@frontiernet.net Received: from filter01.roc.ny.frontiernet.net (filter01.roc.ny.frontiernet.net [66.133.183.68]) by relay01.roc.ny.frontiernet.net (Postfix) with ESMTP id 154C936414F for ; Sun, 11 Sep 2005 05:35:51 +0000 (UTC) Received: from relay01.roc.ny.frontiernet.net ([66.133.182.164]) by filter01.roc.ny.frontiernet.net (filter01.roc.ny.frontiernet.net [66.133.183.68]) (amavisd-new, port 10024) with LMTP id 07621-17-57 for ; Sun, 11 Sep 2005 05:35:51 +0000 (UTC) Received: from [127.0.0.1] (unknown [70.98.128.118]) by relay01.roc.ny.frontiernet.net (Postfix) with ESMTP id 9BE4836414E for ; Sun, 11 Sep 2005 05:35:50 +0000 (UTC) Message-ID: <4323C22D.4080708@frontiernet.net> Date: Sun, 11 Sep 2005 00:35:41 -0500 From: Jim Sower User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040514 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Overvoltage control (help Ed A) References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------060803050203010006050505" X-Antivirus: avast! (VPS 0536-5, 09/09/2005), Outbound message X-Antivirus-Status: Clean X-Virus-Scanned: by amavisd-new-2.3.2 (20050629) at filter01.roc.ny.frontiernet.net This is a multi-part message in MIME format. --------------060803050203010006050505 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit WALTER B KERR wrote: >> 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?? >> I don't. Others will have to speak for themselves. I doubt >> there's enough data points to make an informed decision. I do >> know that with lead-acid batteries it takes quite a while >> (several days - 5 - 10? hrs of operation) to boil the water out >> after the alternator fails to full output. Not an immediate >> catastrophic issue IMO. >> Bernie >> >> >> > > --------------060803050203010006050505 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit WALTER B KERR wrote:

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??

I don't. Others will have to speak for themselves. I doubt there's enough data points to make an informed decision. I do know that with lead-acid batteries it takes quite a while (several days - 5 - 10? hrs of operation) to boil the water out after the alternator fails to full output. Not an immediate catastrophic issue IMO.

Bernie

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