X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 31 Mar 2014 07:36:33 -0400 Message-ID: X-Original-Return-Path: Received: from nm6-vm1.bullet.mail.gq1.yahoo.com ([98.136.218.192] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 6807125 for lml@lancaironline.net; Mon, 31 Mar 2014 06:22:56 -0400 Received-SPF: none receiver=logan.com; client-ip=98.136.218.192; envelope-from=casey.gary@yahoo.com Received: from [216.39.60.180] by nm6.bullet.mail.gq1.yahoo.com with NNFMP; 31 Mar 2014 10:22:19 -0000 Received: from [216.39.60.206] by tm16.bullet.mail.gq1.yahoo.com with NNFMP; 31 Mar 2014 10:22:19 -0000 Received: from [127.0.0.1] by omp1093.mail.gq1.yahoo.com with NNFMP; 31 Mar 2014 10:22:19 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 462506.64484.bm@omp1093.mail.gq1.yahoo.com Received: (qmail 10013 invoked by uid 60001); 31 Mar 2014 10:22:19 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Rocket-MIMEInfo:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=zhG0uAzYebvdtsf0U0Y8+1xg4BqH/6wCKJ4dXM9khfJ3YJeTv05Ame3/S36sZoj/CIG1YTxps3XqTpYhR8i383jaP69t0Jw3TQcmAIfJAShtL+UU/2twCa1+QTi4chNohr6+rxLieeA3msb1Tiz5qXjC5Wkxx99mAjkLJrM/fnE=; X-YMail-OSG: rk2SkskVM1nivWS_z.M49NIRniN6hzXdc05O1mE891_BUqR 9IWmnh5_1Fso51G6zoQVEW17ML.dFj9AQU5vyUKbB6.blscqA9jIfUeExB4z 9k3NCSh8OjGmmvVgp.FF0OOQUGf6foL2diBdFVlFoW9ytA5x1QO8Q73yDOu. 1gLwjaYZTP5f3mUsmJRHvR0Rb0oTrkL59Bp7Pe29N5TPMkdyQba5fTRtEwe4 zgmUEVffCUSS2EeSfbwO416DtRS8i.T6g0IV7TGQ4f97CFJYA0c7HOWH0MQJ LnPyMDvVVx.mBKgmvHzwuLVDlRgzg81NtuMMBzhJG9g_XV0Xnwj9NTx6jPCb BlbqhHGKhnxCD19st9K7mEQl4eKu5ZY_2CDAmj3cmWfmnP6Nly9zL2n_75MI 2NPIDTZkJx3a_Qt3kwbGxt1K3HcDvGTUUblyRo2ILKsfXwvwGXV_aQd82wZ5 MJmfoh1MAE3zZq.HC7ipVehadG2YhXm1_JeW1.d1QTfX3eWeOzQlx2IeMP6n p.86BB9y.S8ywFPHN2umSYsX4IkjdGXBQ9.a0jEQLwAnWiYhiIFzk8jjUmQ- - Received: from [24.247.14.116] by web163503.mail.gq1.yahoo.com via HTTP; Mon, 31 Mar 2014 03:22:19 PDT X-Rocket-MIMEInfo: 002.001,SXQgdGFrZXMgYWJvdXQgMyBmZWV0IG9mIGhlYWQgdG8gZ2V0IDEgcHNpLCBzbyBJIHdvdWxkIGd1ZXNzIHRoYXQgdGhlIGNvcnJlY3QgcmVhZGluZywgaWYgdGhlIHByZXNzdXJlIHNlbnNvciBpcyBhdCBjYXJidXJldG9yIGxldmVsIHdvdWxkIGNsb3NlIHRvIDEgcHNpLiDCoEJ1dCBpZiB5b3UgYXJlIHJlYWRpbmcgYSBzdGVhbSBnYXVnZSBpbiB0aGUgcGFuZWwsIG9yIGEgcHJlc3N1cmUgc2Vuc29yIG1vdW50ZWQgYWJvdmUgdGhlIGNhcmJ1cmV0b3IgbGV2ZWwsIGl0IGRlcGVuZHMgb24gd2hldGhlciB0aGUBMAEBAQE- X-Mailer: YahooMailWebService/0.8.181.645 References: X-Original-Message-ID: <1396261339.269.YahooMailNeo@web163503.mail.gq1.yahoo.com> X-Original-Date: Mon, 31 Mar 2014 03:22:19 -0700 (PDT) From: Gary Casey Reply-To: Gary Casey Subject: Re: VMS1000 pressure gauges on LNC2 X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="48240482-505910991-1396261339=:269" --48240482-505910991-1396261339=:269 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable It takes about 3 feet of head to get 1 psi, so I would guess that the corre= ct reading, if the pressure sensor is at carburetor level would close to 1 = psi. =A0But if you are reading a steam gauge in the panel, or a pressure se= nsor mounted above the carburetor level, it depends on whether the pressure= sense line is full of fuel or air. =A0It will probably be full of fuel if = it has been installed for some time, but if you just installed it there wil= l be air in it. =A0So it's not exactly simple if you are trying to get an e= xact reading.=0AGary Csey=0A=0AFrom Bill:=0A=0AAssuming that you have a hea= der tank, you should show 1 or 2 psi fuel =3D=0Apressure at the carb with e= verything shut down. It=3DE2=3D80=3D99s simply =3D=0Agravity head pressure.= Yet another advantage of header tanks. Did you =3D=0Aalso check the oil pr= essure with a steam gauge?=3D20=0A=0ABill Harrelson=0AN6ZQ=A0 IV 500 hrs.= =0A --48240482-505910991-1396261339=:269 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
It takes about 3 feet of head to get 1 psi, so I would g= uess that the correct reading, if the pressure sensor is at carburetor leve= l would close to 1 psi.  But if you are reading a steam gauge in the p= anel, or a pressure sensor mounted above the carburetor level, it depends o= n whether the pressure sense line is full of fuel or air.  It will pro= bably be full of fuel if it has been installed for some time, but if you ju= st installed it there will be air in it.  So it's not exactly simple i= f you are trying to get an exact reading.
Gary Csey

From Bill:

Assuming that= you have a header tank, you should show 1 or 2 psi fuel =3D
pressure at the carb with everything shut down= . It=3DE2=3D80=3D99s simply =3D
= gravity head pressure. Yet another advantage of header tanks. Did you =3D
also check the oil pressure with = a steam gauge?=3D20

Bill Harrelson
N6ZQ&= nbsp; IV 500 hrs.
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