Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 24 Dec 2002 08:03:26 -0500 Message-ID: X-Original-Return-Path: Received: from mailnw.centurytel.net ([209.206.160.237] verified) by logan.com (CommuniGate Pro SMTP 4.0.2) with ESMTP id 1933615 for lml@lancaironline.net; Mon, 23 Dec 2002 20:28:34 -0500 Received: from c656256a (pppoe-64-91-102-119.rb.gh.centurytel.net [64.91.102.119]) by mailnw.centurytel.net (8.12.6/8.12.6) with SMTP id gBO1SX5T004426 for ; Mon, 23 Dec 2002 17:28:33 -0800 (PST) X-Original-Message-ID: <001701c2aae4$2de76500$77665b40@mshome.net> From: "Robert Smiley" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] LNC2 Fuel X-Original-Date: Mon, 23 Dec 2002 17:34:11 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Another Idea, other than the simply elegant lancair solution for header tank, main tanks with two pumps. In place of the facet pump on each tank, install a one way valve. On/Off. Run both valves into a TEE which inputs into Facet Pump A. Facet Pump B is in line. Each pump has a separate power circuit. You do not want to have the pumps in parallel with each other on the same circuit. If either pump shorted out, the power would be unavailable to the good pump hence no fuel to header tank. Make sure that the Tee is at the low point of the fuselage before rising to any pump. Thus you can open both valves and tanks can balance out fuel or you can operate from right left or both tanks to fill the header. Rob is right. I have yet to unport a main tank after 230 hours. Complexity??? Two valves but more flexibility. Bob Smiley N94RJ