X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 25 Oct 2011 21:00:38 -0400 Message-ID: X-Original-Return-Path: Received: from nm5.access.bullet.mail.sp2.yahoo.com ([98.139.44.132] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with SMTP id 5172735 for lml@lancaironline.net; Tue, 25 Oct 2011 20:56:01 -0400 Received-SPF: neutral receiver=logan.com; client-ip=98.139.44.132; envelope-from=browncc1@verizon.net Received: from [98.139.44.101] by nm5.access.bullet.mail.sp2.yahoo.com with NNFMP; 26 Oct 2011 00:55:27 -0000 Received: from [98.139.44.83] by tm6.access.bullet.mail.sp2.yahoo.com with NNFMP; 26 Oct 2011 00:55:27 -0000 Received: from [127.0.0.1] by omp1020.access.mail.sp2.yahoo.com with NNFMP; 26 Oct 2011 00:55:27 -0000 X-Yahoo-Newman-Id: 256468.8988.bm@omp1020.access.mail.sp2.yahoo.com Received: (qmail 61540 invoked from network); 26 Oct 2011 00:55:26 -0000 X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: 6QxuhgoVM1lnBQfSy8luS1p1.vDdOe4tDl6_pmmtjCvGqJC JFVJFnzlbzo3HX.A2nBEPDQefLqNJenZidIlijade1nDWqlR0JlcvZKreZTD jfwrQY_iv9B1jBDF58hHv15rIkV6BxTCT7Cxmmgp8uwMA0Lum8JqMwRBvXJU 2H4Kf5ZtKoP3Zd2M84UlpZACmpSEceomTgng.gLprbwlRq4L9UHdWGjMSCEq dhijeBBkMbiHyIAGZXSdwOQf2OTcdun7H3lfiioO0Kce.0lebsyl6v_wm4WA ibKvnZqKpZSL_wVMnNCTuN1rAZuimUIjB5p1CJW5Q4xtQZHE6UryTNUukdXP SadZ11.RbqqBGH6SpPsZQcdmsEvVkwYLqGyZ4j8a9D5u.uzGiZ4cFpGzM3pF .kqDN9CV4j1zSVYewTq0tIEJC2Vq8 X-Yahoo-SMTP: F49l9g6swBC0R9n8vJIbm7Tf3P8Xlmia8rHIwTlO__Ml Received: from chass-imac-2.home (browncc1@72.64.81.165 with plain) by smtp104.vzn.mail.ne1.yahoo.com with SMTP; 25 Oct 2011 17:55:26 -0700 PDT From: Charley Brown Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-2--166574283 Subject: Re: [LML] Re: Problem with Fluctuating Amperage X-Original-Date: Tue, 25 Oct 2011 19:55:25 -0500 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <42F48CA1-2CB5-4530-9A9A-A69ADCA40034@verizon.net> X-Mailer: Apple Mail (2.1084) --Apple-Mail-2--166574283 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii The voltage almost HAS to be fluctuating wildly if the ammeter reading = is anywhere near right -- which raises the question, why is it only the = fuel readings that are affected? With those amps, the whole system = should be flashing on/off... If this is the amperage for the primary = alternator... is there a backup alternator involved? Oscillations = between primary and backup can be significant if they both regulate to a = similar voltage. Charley Brown Legacy 28V dual alt single batt g900x On Oct 25, 2011, at 1:01 PM, Dennis Johnson wrote: Hi David, =20 What is the voltage reading during this time? Does the Grand Rapids = EFIS Sport record data that you can download and study after a flight?=20= =20 Dennis Legacy 450 hours ----- Original Message ----- From: Taylor, David To: lml@lancaironline.net Sent: Tuesday, October 25, 2011 4:50 AM Subject: [LML] Problem with Fluctuating Amperage Any ideas about what would cause my amperage to start fluctuating wildly = about 5 minutes into a flight?=20 It starts out fine after takeoff at 15 amps and then goes to -50 amps = for 30 seconds, and then gyrates between 5 amps and -50 amps for a = minute and then goes back to normal. It repeats this sequence every 5 = minutes.=20 My fuel gages also go down to zero during this episode and then back to = normal. Is my B&C LR3C Linear Regulator going bad?=20 (I'm getting these readings from my Grand Rapids EIS engine monitor. = It's hooked up to a Grand Rapids EFIS Sport.) Thanks for the help! David T. Legacy RG =20 --Apple-Mail-2--166574283 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii
The voltage almost HAS to be fluctuating = wildly if the ammeter reading is anywhere near right -- which raises the = question, why is it only the fuel readings that are affected?  With = those amps, the whole system should be flashing on/off...  If this = is the amperage for the primary alternator...  is there a backup = alternator involved?  Oscillations between primary and backup can = be significant if they both regulate to a similar = voltage.

Charley Brown
Legacy =  28V  dual alt single batt = g900x


On Oct 25, 2011, at 1:01 PM, = Dennis Johnson wrote:

Hi = David,
 
What is the voltage reading during = this time?  Does the Grand Rapids EFIS Sport record data that you = can download and study after a = flight? 
 
Dennis
Legacy 450 = hours
----- Original = Message -----