Return-Path: Received: from relay01.roc.ny.frontiernet.net ([66.133.131.34] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 611517 for flyrotary@lancaironline.net; Tue, 18 Jan 2005 10:40:25 -0500 Received-SPF: pass receiver=logan.com; client-ip=66.133.131.34; envelope-from=canarder@frontiernet.net Received: from filter01.roc.ny.frontiernet.net (filter01.roc.ny.frontiernet.net [66.133.131.176]) by relay01.roc.ny.frontiernet.net (Postfix) with ESMTP id D180DFF14 for ; Tue, 18 Jan 2005 15:39:54 +0000 (UTC) Received: from relay01.roc.ny.frontiernet.net ([66.133.131.34]) by filter01.roc.ny.frontiernet.net (filter01.roc.ny.frontiernet.net [66.133.131.176]) (amavisd-new, port 10024) with LMTP id 27350-08-77 for ; Tue, 18 Jan 2005 15:39:54 +0000 (UTC) Received: from [127.0.0.1] (70-97-232-197.dsl2.cok.tn.frontiernet.net [70.97.232.197]) by relay01.roc.ny.frontiernet.net (Postfix) with ESMTP id 619721002A for ; Tue, 18 Jan 2005 15:39:53 +0000 (UTC) Message-ID: <41ED2DC8.3080309@frontiernet.net> Date: Tue, 18 Jan 2005 09:39:52 -0600 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: New discovery... References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Antivirus: avast! (VPS 0502-4, 01/16/2005), Outbound message X-Antivirus-Status: Clean X-Virus-Scanned: by amavisd-new-20040701 (2.0) at filter01.roc.ny.frontiernet.net Just wondering - are the ECU and EM2 designed to run at 14.7V? Or is there some sort of internal regulator that drops it down to the actual operating voltage? If the latter is so, one might [partially?] bypass the regulator. Sort of like the automotive ignition systems that were designed to run at 9-10V and had a ballast resistor to drop charging voltage to operating voltage which was bypassed during engine cranking. Just a brain fart as I don't know ANY internal details of EM2 ... Jim S. Alex Madsen wrote: >It seems to me a good solution to this would be to add a voltage regulator >that can run the ECU and EM2 at a lower voltage (say 6V). This would avoid >some frustration with low batteries on the ground and I think add safety >allowing longer flight times with a dead alternator. > >Alex Madsen > > >-----Original Message----- >From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On >Behalf Of Todd Bartrim >Sent: Tuesday, January 18, 2005 1:31 AM >To: Rotary motors in aircraft >Subject: [FlyRotary] Re: New discovery... > > I believe that the EM2 is set to give this alarm. My bottom line on >the >screen will flash "BATTERY VOLTAGE TOO LOW" at ~9 volts, IIRC. When I'm >cranking it when it's too darn cold to start, I can hear it trying to fire >but as soon as the voltage drops far enough that the warning appears, it >will no longer try to fire. Then out come the jumper cables :-( > When Tracy finishes vacationing or building Rusty's parts or trouble >shooting for John or Bernie, maybe he'll come back to us lost souls and >clarify this for us. > >Cheers... >Todd. > > > >