Return-Path: Received: from [207.230.226.92] (HELO corpprod2.canfor.ca) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2930847 for flyrotary@lancaironline.net; Tue, 13 Jan 2004 15:25:51 -0500 Received: from exchange.canfor.ca ([198.162.162.49]) by corpprod2.canfor.ca with Microsoft SMTPSVC(5.0.2195.5329); Tue, 13 Jan 2004 12:25:17 -0800 Received: by mail.canfor.ca with Internet Mail Service (5.5.2653.19) id ; Tue, 13 Jan 2004 12:25:17 -0800 Message-ID: <1F17B59A61D4194095359264D24D22A2708C21@mailman.canfor.ca> From: "Bartrim, Todd" To: 'Rotary motors in aircraft' Subject: RE: [FlyRotary] shaping ducts Date: Tue, 13 Jan 2004 12:25:16 -0800 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C3DA13.5B64C3B0" Return-Path: sbartrim@mail.canfor.ca X-OriginalArrivalTime: 13 Jan 2004 20:25:17.0885 (UTC) FILETIME=[5BF9FED0:01C3DA13] This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C3DA13.5B64C3B0 Content-Type: text/plain One big advantage to using the expanding foam inside a plastic bag while cores are in place under the cowl, is that any objects/obstacles are clearly imprinted into the cured foam block/ball. When you remove the foam and begin sanding to shape, you can easily see where object interference will occur and simply sand enough off those areas to ensure proper clearance. This works well to make a proper fitting duct the first time. The disadvantage is that sometimes the foam will conform so tightly to obstacles, that it takes a measure of gentle persuasion to remove the foam block. S. Todd Bartrim Turbo 13B RX-9endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Imagination is more important than knowledge" -Albert Einstein ------_=_NextPart_001_01C3DA13.5B64C3B0 Content-Type: text/html Content-Transfer-Encoding: quoted-printable RE: [FlyRotary] shaping ducts

        One big advantage to using the expanding foam inside a = plastic bag while cores are in place under the cowl, is that any = objects/obstacles are clearly imprinted into the cured foam block/ball. = When you remove the foam and begin sanding to shape, you can easily see = where object interference will occur and simply sand enough off those = areas to ensure proper clearance.

        This works well to make a proper fitting duct the first = time. The disadvantage is that sometimes the foam will conform so = tightly to obstacles, that it takes a measure of gentle persuasion to = remove the foam block.

S. Todd Bartrim
Turbo 13B
RX-9endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

        "Imagination is more important than = knowledge"
        =         =         =         =         -Albert Einstein

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