X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 26 Oct 2011 06:21:22 -0400 Message-ID: X-Original-Return-Path: Received: from mail.crescentpark.com ([66.192.64.50] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with ESMTP id 5172936 for lml@lancaironline.net; Wed, 26 Oct 2011 02:54:13 -0400 Received-SPF: none receiver=logan.com; client-ip=66.192.64.50; envelope-from=dtaylor@crescentpark.com X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CC93AB.FCA19598" Subject: RE: [LML] Re: Problem with Fluctuating Amperage X-Original-Date: Wed, 26 Oct 2011 02:54:02 -0400 X-Original-Message-ID: <4BC31C60B4CBCD4CB1D0A2F716CC711B01E37074@server31.crescentpark.com> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] Re: Problem with Fluctuating Amperage Thread-Index: AcyTer5ylT212jYmTEupIYZe+BMPhwALShrg References: From: "Taylor, David" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01CC93AB.FCA19598 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Charley, The voltage holds steady. But yes some of the other readings gyrate around slowly and then recover with the amp reading after 30 seconds. I only have one alternator, battery etc - very simple system and plane! =20 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Charley Brown Sent: 10-25-11-Tue 21:01 To: lml@lancaironline.net Subject: [LML] Re: Problem with Fluctuating Amperage =20 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. =20 Charley Brown Legacy 28V dual alt single batt g900x =20 =20 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: =20 To: lml@lancaironline.net Sent: Tuesday, October 25, 2011 4:50 AM Subject: [LML] Problem with Fluctuating Amperage =20 Any ideas about what would cause my amperage to start fluctuating wildly about 5 minutes into a flight?=20 =09 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 =09 My fuel gages also go down to zero during this episode and then back to normal. =09 Is my B&C LR3C Linear Regulator going bad?=20 =09 (I'm getting these readings from my Grand Rapids EIS engine monitor. It's hooked up to a Grand Rapids EFIS Sport.) =09 Thanks for the help! =09 David T. Legacy RG =20 =20 ------_=_NextPart_001_01CC93AB.FCA19598 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Charley,  The voltage holds steady.  But yes some of the = other readings gyrate around slowly and then recover with the amp = reading after 30 seconds.  I only have one alternator, battery etc =  – very simple system and plane!

 

From:= = Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = Charley Brown
Sent: 10-25-11-Tue 21:01
To: = lml@lancaironline.net
Subject: [LML] Re: Problem with = Fluctuating Amperage

 

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 -----

From:<= /b> = =

Sent:<= /b> = Tuesday, = October 25, 2011 4:50 AM

Subject: = [LML] = Problem with Fluctuating Amperage

&nbs= p;

Any ideas = about what would cause my amperage to start fluctuating wildly about 5 = minutes into a flight? 

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. 

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? 

(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

 =

 

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