X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 23 Apr 2012 12:05:17 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-scoter.atl.sa.earthlink.net ([209.86.89.67] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5501936 for lml@lancaironline.net; Mon, 23 Apr 2012 09:38:06 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.67; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=LTwCEQMsoOqPquEHifzo9R3ku4OAurmCsL0TD9QEZ6CWJFccCsXOKhrRY8XLL/Ik; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [64.222.159.235] (helo=[192.168.1.24]) by elasmtp-scoter.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1SMJSM-0000Rt-LU for lml@lancaironline.net; Mon, 23 Apr 2012 09:37:30 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-1261-398764311 Subject: Re: [LML] Re: Fuel Tank Calibration Followup X-Original-Date: Mon, 23 Apr 2012 09:37:29 -0400 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <8E083B49-567F-4496-ABBD-4180A5277F6F@earthlink.net> X-Mailer: Apple Mail (2.1084) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940723783211fac5f5efb4f33e479aa0fa8350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 64.222.159.235 --Apple-Mail-1261-398764311 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii My personal landing minimum for VFR is 1 hour + unusable. which is about = 18 + 4. I'm interested in reducing the 4 so that 18 + unusable is a smaller = number.=20 To minimize the slosh factor, I land with more of that in one tank than = the other. Colyn Case LIVP - N136CS On Apr 23, 2012, at 12:53 AM, Bill Bradburry wrote: 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. =20 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 =20 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.=20 =20 Thanks again! Dennis=20 --Apple-Mail-1261-398764311 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=us-ascii My personal landing minimum for VFR is 1 hour + unusable. which is about 18 + 4.
I'm interested in reducing the 4 so that 18 + unusable is a smaller number. 

To minimize the slosh factor,  I land with more of that in one tank than the other.

Colyn Case
LIVP - N136CS


On Apr 23, 2012, at 12:53 AM, Bill Bradburry wrote:

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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