X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 23 Apr 2012 00:53:08 -0400 Message-ID: X-Original-Return-Path: Received: from fmailhost06.isp.att.net ([207.115.11.56] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5491305 for lml@lancaironline.net; Fri, 20 Apr 2012 18:15:52 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.56; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-148-138.mco.bellsouth.net[98.85.148.138]) by isp.att.net (frfwmhc06) with SMTP id <20120420221515H060070a48e>; Fri, 20 Apr 2012 22:15:15 +0000 X-Originating-IP: [98.85.148.138] From: "Bill Bradburry" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Fuel Tank Calibration Followup X-Original-Date: Fri, 20 Apr 2012 18:15:18 -0400 X-Original-Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0074_01CD1F21.8B753AB0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac0e+HqGLaNPA3OpSxu8FQbbMkmRBQASa1sA X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_0074_01CD1F21.8B753AB0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit When my Legacy fuel pump starves out, I can get no more than a couple of drops out of the fuel tank sump. That would indicate that there is no unusable fuel in the tank. The problem is that I am certain that would not be the result in flight. Sloshing fuel would unport the inlet. My personal minimum is 5 gal or (in my case) 1/8th tank. B2 _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Dennis Ramsey Sent: Friday, April 20, 2012 9:21 AM To: lml@lancaironline.net Subject: [LML] Fuel Tank Calibration Followup Thanks to all who responded both on the LML and privately. In the end I had an issue with incorrect pinnout on a DSUB for the right wing input. When I discovered that problem (after two days of troubleshooting and testing wires) and corrected the pinnout and drawings, the problem went away. And for the record the system easily recognizes one gallon of fuel ( I have the Garmin G3X). I have an old kit so the probes are the 8 foot probes originating at the wing root. I am very pleased with the probe overall. I added a gallon at a time to the wings and got a good detection of each gallon up until about 39 gallons in my 40 gallon wings. I have heard stories of high quantities of unusable fuel in these birds. Granted this is not a completely valid test because it is not simulating the backpressure of the engine, but the pump loss of flow coincided with the fuel level reading zero gallons. I would be interested if others had experienced similar results. I am curious as to what the real world experience has been on unusable fuel and how you tested it. Thanks again! Dennis ------=_NextPart_000_0074_01CD1F21.8B753AB0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

When my Legacy fuel pump starves = out, I can get no more than a couple of drops out of the fuel tank sump.  That = would indicate that there is no unusable fuel in the tank.  The problem = is that I am certain that would not be the result in flight.  Sloshing fuel = would unport the inlet.  My personal minimum is 5 gal or (in my case) = 1/8th tank.

 

B2

From: = Lancair Mailing List = [mailto:lml@lancaironline.net] On Behalf Of Dennis Ramsey
Sent: Friday, April 20, = 2012 9:21 AM
To: = lml@lancaironline.net
Subject: [LML] Fuel Tank Calibration Followup

 

Thanks to all who responded both on the LML and privately.  = In the end I had an issue with incorrect pinnout on a DSUB for the right wing input.  When I discovered  that problem (after two days of troubleshooting and testing wires) and corrected the pinnout and = drawings, the problem went away.  And for the record the system easily recognizes = one gallon of fuel ( I have the Garmin G3X).   I have an old kit = so the probes are the 8 foot probes originating at the wing root.   I = am very pleased with the probe overall.  I added a gallon at a time to the = wings and got  a good detection of each gallon up until about 39 gallons = in my 40 gallon wings.   I have heard stories of high quantities of unusable fuel in these birds.   Granted this is not a = completely valid test because it is not simulating the backpressure of the engine, = but the pump loss of flow coincided with the fuel level reading zero gallons.    I would be interested if others had = experienced similar results.   I am curious as to what the real world = experience has been on unusable fuel and how you tested = it. 

 

Thanks again!   = Dennis 

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