X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 01 Jun 2012 00:12:51 -0400 Message-ID: X-Original-Return-Path: Received: from nm27-vm0.access.bullet.mail.sp2.yahoo.com ([98.139.44.188] verified) by logan.com (CommuniGate Pro SMTP 5.4.5) with SMTP id 5571748 for lml@lancaironline.net; Thu, 31 May 2012 20:52:45 -0400 Received-SPF: neutral receiver=logan.com; client-ip=98.139.44.188; envelope-from=browncc1@verizon.net Received: from [98.139.44.102] by nm27.access.bullet.mail.sp2.yahoo.com with NNFMP; 01 Jun 2012 00:52:11 -0000 Received: from [98.139.44.69] by tm7.access.bullet.mail.sp2.yahoo.com with NNFMP; 01 Jun 2012 00:52:11 -0000 Received: from [127.0.0.1] by omp1006.access.mail.sp2.yahoo.com with NNFMP; 01 Jun 2012 00:52:11 -0000 X-Yahoo-Newman-Id: 293058.42442.bm@omp1006.access.mail.sp2.yahoo.com Received: (qmail 1868 invoked from network); 1 Jun 2012 00:52:10 -0000 X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: oaG7_CwVM1lA9d_x3u_Yt0GbbX3YiVmyzHSE9tu60Xg6Jsy 3.LfvEGLyd9HPIw6uzf7YA14Qx0MpfjmYarEHprJ15Aksj4n6neTnydc8Vvp .gvKHgPhzGzdotoJVTPKsbJkzXOQHmqpiW1xrOG8xwNxFtFeWFB8VC20Wwv5 9GvuPO2j7qdCGI83nB0_2lRMGioPqE_D4yPULen84I99QISvsuMBGdDCV5AN fr0m0cczE654WgPuRDLmrKfdq46Yui6zzJnISwXq7VKyb_2EOY4derZHKytP QZgjjvaQpwBb.HM.AuGWQs3XGqkPwh48SPJKZh39eCQUweBk0clGQf.jzdr9 Fb0gXK0qmG3TWjym2inBIhzTMs52i2ABS25D0OQtU.l2gH9YDpLYk2w2ogqR JANC5PIAn0qNXCx6MFbqrXOrDJYr6h.01ofHRScRDQoo- X-Yahoo-SMTP: F49l9g6swBC0R9n8vJIbm7Tf3P8Xlmia8rHIwTlO__Ml Received: from [192.168.1.3] (browncc1@72.64.105.53 with plain) by smtp104.vzn.mail.ne1.yahoo.com with SMTP; 31 May 2012 17:52:10 -0700 PDT From: Charles Brown Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-1--572523071 Subject: Re: [LML] Re: Fuel vent check valves X-Original-Date: Thu, 31 May 2012 19:52:09 -0500 In-Reply-To: X-Original-To: "Lancair Mailing List" References: X-Original-Message-Id: <08585C92-2645-4C0D-B55D-DDB124137AB1@verizon.net> X-Mailer: Apple Mail (2.1084) --Apple-Mail-1--572523071 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Be advised, the Andair check valve is probably not at fault. They are = designed to allow fuel and air to pass through *either* direction, only = there's a very significant restriction to fuel *leaving* the tank. When = you think about it, this has to be so ... If you top the tank and you = have a good cap that seals well and the fuel selector is OFF then as the = fuel expands (if it warms up), it *must* go out the vent. I bought a = new Andair valve and tested it, that's when I learned this. My Legacy RG also vents fuel from the left tank only, and I *think* that = fuel also siphons right to left even on level ground - though I *could* = be wrong about that. At any rate, I leave it a couple of gallons down = unless I'm just about to take off on a long cross-country. The best comment I heard on this, which I haven't checked out, is to = make sure that the vent line leaves the tank in an uphill direction. = Granted there's precious little room for that, but if the line leaves = the tank downhill it seems to present a potential for siphoning. Charley Brown Legacy RG #299 110 hours On May 31, 2012, at 12:09 PM, Bill Bradburry wrote: Thanks, Steve. =20 That is what I expected should happen. I sent an email to Andair a = couple of days ago but no response so far. I was asking them for ways = to test the check valves in place. They are not the easiest thing to = access to remove. I plan to try to test them today. Probably a vacuum = cleaner with the fuel caps off?? I want to be careful about = pressurizing the tanks. That is why I hoped to hear from Andair=85 =20 Bill B =20 --Apple-Mail-1--572523071 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252
Be advised, the Andair check valve is probably = not at fault.  They are designed to allow fuel and air to pass = through *either* direction, only there's a very significant restriction = to fuel *leaving* the tank.  When you think about it, this has to = be so ... If you top the tank and you have a good cap that seals well = and the fuel selector is OFF then as the fuel expands (if it warms up), = it *must* go out the vent.  I bought a new Andair valve and tested = it, that's when I learned this.

My Legacy RG = also vents fuel from the left tank only, and I *think* that fuel also = siphons right to left even on level ground - though I *could* be wrong = about that.  At any rate, I leave it a couple of gallons down = unless I'm just about to take off on a long = cross-country.

The best comment I heard on = this, which I haven't checked out, is to make sure that the vent line = leaves the tank in an uphill direction.  Granted there's precious = little room for that, but if the line leaves the tank downhill it seems = to present a potential for siphoning.

Charley = Brown
Legacy RG #299
110 = hours


On May 31, 2012, at 12:09 PM, = Bill Bradburry wrote:

Thanks, Steve.
That is what I expected should happen.  I sent an = email to Andair a couple of days ago but no response so far.  I was = asking them for ways to test the check valves in place.  They are = not the easiest thing to access to remove.  I plan to try to test = them today.  Probably a vacuum cleaner with the fuel caps = off??  I want to be careful about pressurizing the tanks.  = That is why I hoped to hear from = Andair=85
 
Bill = B