Return-Path: Sender: (Marvin Kaye) To: lml Date: Mon, 02 Dec 2002 01:39:03 -0500 Message-ID: X-Original-Return-Path: Received: from maynard.mail.mindspring.net ([207.69.200.243] verified) by logan.com (CommuniGate Pro SMTP 4.0.2) with ESMTP id 1892393 for lml@lancaironline.net; Sun, 01 Dec 2002 20:38:12 -0500 Received: from h-66-167-45-72.phlapafg.covad.net ([66.167.45.72] helo=mindspring.com) by maynard.mail.mindspring.net with esmtp (Exim 3.33 #1) id 18IfXH-0006X1-00 for lml@lancaironline.net; Sun, 01 Dec 2002 20:38:11 -0500 X-Original-Message-ID: <3DEABA10.2B8A52B3@mindspring.com> X-Original-Date: Sun, 01 Dec 2002 20:40:32 -0500 From: Scott Turner X-Mailer: Mozilla 4.5 [en]C-CCK-MCD ezn/58/n (Win98; U) X-Accept-Language: en MIME-Version: 1.0 X-Original-To: lml@lancaironline.net Subject: IV-P Cabin Air System Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit I am building a IV-P with an all electric panel. The Dukes cabin pressure control valve requires vacuum to operate, as I understand it, during at least any low differential cabin to outside air pressure periods. My question is what methods are being used to get sufficient vacuum to the valve, with low weight and trouble free operation?