X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp119.sbc.mail.re3.yahoo.com ([66.196.96.92] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with SMTP id 2356267 for flyrotary@lancaironline.net; Thu, 27 Sep 2007 20:34:48 -0400 Received-SPF: none receiver=logan.com; client-ip=66.196.96.92; envelope-from=downing.j@sbcglobal.net Received: (qmail 11557 invoked from network); 28 Sep 2007 00:34:13 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:X-YMail-OSG:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=yJNBIoUuHMcy81N0FzCUbpSyhjlgXVaiJoTg964rkR6+MY8u+cYosRIbZ5qi8CThh/McbAocsHEf8NfDC3Pzbc0D2uvT8CI9oaExUa7I5W8jzaV9mZMkgg3rBWwyUeWrgSb6NsWleKBZYx7usvN1RsxL0lGKpYnyUlpOnXFW/EU= ; Received: from unknown (HELO mom) (downing.j@sbcglobal.net@75.40.255.238 with login) by smtp119.sbc.mail.re3.yahoo.com with SMTP; 28 Sep 2007 00:34:12 -0000 X-YMail-OSG: 6J8PlGsVM1lySoiSDNDbXoT2sZpw2753ZINosilxkVsrRj7_pl79CqnTlfs1PQ.6Cn0pmlqjBvGYhc77n_Y9Y7X9mfxsLEv8AWCNEvKmHF8ZYn5M95kp6jROQPF8Bg-- Message-ID: <002001c80167$d1561cc0$4001a8c0@gateway.2wire.net> From: "John Downing" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: cowling protection Date: Thu, 27 Sep 2007 20:37:57 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01C80146.49C75D80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_001D_01C80146.49C75D80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bill, I have 2 tight 90 degree turns that I cut out of a SS donut. For = the short term, like until next January, I could use some temporary = protection. I looked at the Power Sport installation two years back and = they used a complete shield on the exhaust pipe and it will take a lot = of time to fabricate. Was hoping to fly soon and finish the detail = things next winter when the snow gets deep. JohnD ----- Original Message -----=20 From: WRJJRS@aol.com=20 To: Rotary motors in aircraft=20 Sent: Thursday, September 27, 2007 12:29 AM Subject: [FlyRotary] Re: cowling protection In a message dated 9/26/2007 6:05:38 PM Pacific Standard Time, = downing.j@sbcglobal.net writes: What is the rule of thumb for the heat shield between the exhaust = pipe and the cowling. I have fiberfrax to glue on and planned on = covering it with .016 SS, the pipe is 2 1/2 SS, do I need a shield 5 = inches wide? Thankyou JohnD=20 John, insulation is a good idea but the best way to prevent radiated = heat is to use a heat sheld. The more space you can give it (on BOTH = sides) the better. Feeding a small air bleed in the area to cary off the = heat is also a good idea. The air bleed doesn't have to be big, it just = has to keep the air moving. Bill Jepson -------------------------------------------------------------------------= ----- See what's new at AOL.com and Make AOL Your Homepage. ------=_NextPart_000_001D_01C80146.49C75D80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bill,  I have 2 tight 90 degree turns that I cut out of a SS=20 donut.  For the short term, like until next January, I could use = some=20 temporary protection.  I looked at the Power Sport installation two = years=20 back and they used a complete shield on the exhaust pipe and it will = take a lot=20 of time to fabricate.  Was hoping to fly soon and finish the detail = things=20 next winter when the snow gets deep.  JohnD
----- Original Message -----
From:=20 WRJJRS@aol.com
Sent: Thursday, September 27, = 2007 12:29=20 AM
Subject: [FlyRotary] Re: = cowling=20 protection

In a message dated 9/26/2007 6:05:38 PM Pacific Standard Time, downing.j@sbcglobal.net=20 writes:
What is the rule of thumb for the = heat shield=20 between the exhaust pipe  and the cowling.  I have = fiberfrax to=20 glue on and planned on covering it with .016 SS, the pipe is 2 1/2 = SS, do I=20 need a shield 5 inches wide?  Thankyou=20 JohnD 
John, insulation is a good idea but the best way to prevent = radiated heat=20 is to use a heat sheld. The more space you can give it (on BOTH sides) = the=20 better. Feeding a small air bleed in the area to cary off the heat is = also a=20 good idea. The air bleed doesn't have to be big, it just has to keep = the air=20 moving.
Bill Jepson



See what's new at AOL.com=20 and Make AOL Your=20 Homepage.
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