Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 28 May 2002 08:09:54 -0400 Message-ID: X-Original-Return-Path: Received: from pop3.olsusa.com ([63.150.212.2] verified) by logan.com (CommuniGate Pro SMTP 4.0b1) with ESMTP id 1249205 for lml@lancaironline.net; Tue, 28 May 2002 08:05:35 -0400 Received: from goose.prod.itd.earthlink.net ([207.217.120.18]) by pop3.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-71866U8000L800S0V35) with ESMTP id com for ; Tue, 28 May 2002 08:00:28 -0400 Received: from sdn-ap-002watacop1606.dialsprint.net ([63.187.206.82] helo=f3g6s4) by goose.prod.itd.earthlink.net with smtp (Exim 3.33 #2) id 17CfjL-0007S7-00 for lancair.list@olsusa.com; Tue, 28 May 2002 05:05:35 -0700 X-Original-Message-ID: <002e01c20640$e67b2960$52cebb3f@f3g6s4> Reply-To: "Dan Schaefer" From: "Dan Schaefer" X-Original-To: "Lancair list" Subject: Re: vacuum vs. electric X-Original-Date: Tue, 28 May 2002 05:12:11 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" 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 Lorn, they all suck harder than required (when new). You need a regulator between your pump and gyros to reduce the pump output to the gauge green-lines. It's standard equipment on every airplane, using vacuum/pressure to drive the gyros. The standard regulator is adjustable to set the input to the gyros to the required 4.5 - 5.5 on the gauge. And yes, 6.75 is likely to shorten the life of the using equipment. The gauge is marked that way because the instruments are designed for that level of vacuum. Dan Schaefer