Return-Path: Sender: (Marvin Kaye) To: lml Date: Tue, 15 Jul 2003 09:48:05 -0400 Message-ID: X-Original-Return-Path: <2luv2fly@cox.net> Received: from lakemtao03.cox.net ([68.1.17.242] verified) by logan.com (CommuniGate Pro SMTP 4.1b9) with ESMTP id 2475613 for lml@lancaironline.net; Tue, 15 Jul 2003 08:17:54 -0400 Received: from 308h101 ([68.106.93.123]) by lakemtao03.cox.net (InterMail vM.5.01.04.05 201-253-122-122-105-20011231) with SMTP id <20030715121753.QBEX23518.lakemtao03.cox.net@308h101> for ; Tue, 15 Jul 2003 08:17:53 -0400 X-Original-Message-ID: <001301c34aca$fe251c40$7b5d6a44@hr.cox.net> From: "Janie & Ed Smith" <2luv2fly@cox.net> X-Original-To: "Lancair List" Subject: Pressurization X-Original-Date: Tue, 15 Jul 2003 08:17:00 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C34AA9.76E8C2C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6600 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 This is a multi-part message in MIME format. ------=_NextPart_000_0010_01C34AA9.76E8C2C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Tuesday Morning 7/15/03 Jeff, After fabricating a new door for a friend of mine, we pressure tested = the door and airplane by renting a portable compressor with a capacity = of somewhere around 80 - 100 SCFM and hooked it to the mixing valve on = the firewall. We used a ball valve at the compressor to SLOWLY open to = pressurize the airplane. You have to remember that the compressor could = over pressurize the plane and cause damage, so this procedure calls for = slow and deliberate work with the ball valve. Have someone guard the = valve while opening it and don't let anyone else fiddle with it. The idea is to place enough air in the cabin to bring the pressure up to = the 5-7 PSI for testing and stop there - don't go any further. If you = did a good job of sealing the leaks, the compressor won't have to work = very hard to fill the cabin. If the compressor stays loaded (pumping = air), you have some leaks to find. You need to read the manual = on the Dukes valve to figure how to "fool" it so you can pressurize the = plane on the ground. Hope this helps. Ed Smith Chesapeake, VA ------=_NextPart_000_0010_01C34AA9.76E8C2C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Tuesday Morning
7/15/03
 
Jeff,
 
After fabricating a new door for a friend of mine, = we pressure=20 tested the door and airplane by renting a portable compressor with = a=20 capacity of somewhere around 80 - 100 SCFM and hooked it to the mixing = valve on=20 the firewall.  We used a ball valve at the compressor to=20 SLOWLY open to pressurize the airplane.  = You have=20 to remember that the compressor could over pressurize the plane and = cause=20 damage, so this procedure calls for slow and deliberate work with the = ball=20 valve.  Have someone guard the valve while opening it and don't let = anyone=20 else fiddle with it.
 
The idea is to place enough air in the cabin to = bring the=20 pressure up to the 5-7 PSI for testing and stop there - don't go any=20 further.  If you did a good job of sealing the leaks, the = compressor won't=20 have to work very hard to fill the cabin.  If the compressor stays = loaded=20 (pumping air), you have some leaks to find. <grin>  You need = to read=20 the manual on the Dukes valve to figure how to "fool" it so you can = pressurize=20 the plane on the ground.
 
Hope this helps.
 
Ed Smith
Chesapeake, VA
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