Return-Path: Received: from fed1mtao04.cox.net ([68.6.19.241] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2918174 for flyrotary@lancaironline.net; Mon, 05 Jan 2004 14:39:45 -0500 Received: from BigAl ([68.107.116.221]) by fed1mtao04.cox.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20040105193937.MCOR3905.fed1mtao04.cox.net@BigAl> for ; Mon, 5 Jan 2004 14:39:37 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] exhaust heat shield Date: Mon, 5 Jan 2004 11:40:04 -0800 Message-ID: <000001c3d3c3$b78472e0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C3D380.A96132E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4024 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C3D380.A96132E0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Best bet might be a layer of thin SS; backed up with a insulating material such as Koolmat, or a couple layers of Al foil on the cool side. For really close to the hottest part of the exhaust; Koolmat makes a multifoil inconel mat that should be good to close to 2000F. Of course it is expensive. Al -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy Sent: Monday, January 05, 2004 11:17 AM To: Rotary motors in aircraft Subject: [FlyRotary] exhaust heat shield Greetings, I'm looking into the best methods for heat shielding around the exhaust pipes. I'll be squeezing pipes between the engine mount tube, and cowl, with just less than an inch to clear on either side. The closest clearance will be about 12"-14" from the exhaust port, so it will still be pretty hot. In the previous messages about turbo heat shielding, I learned that some folks are using aluminum foil, or the commercial temp shielding on the inside of their cowls with good results. How close are your pipes to the cowl? Will simple aluminum foil protect the cowl from the exhaust pipe just an inch away? How about the mount tube? I had the stock turbo shield on the rev-1 setup, and there was about an inch or so of clearance from the heat shield, to the motor mount tube. I also wrapped the mount tube with fire sleeve. When I took it all apart, the fire sleeve appeared undamaged on the outside, but the inside was burnt, as was the paint on the mount tube. I'm wondering if it wouldn't have been better without the fire sleeve, so it would have had some airflow. I've seen the silver heat tape, that can be used to wrap the mount. Will this type of material be sufficient? Thanks, Rusty (Great alcohol report Jim) ------=_NextPart_000_0001_01C3D380.A96132E0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Best bet might be a layer of thin = SS; backed up with a insulating material such as Koolmat, or a couple layers of Al = foil on the cool side.  For really close to the hottest part of the = exhaust; Koolmat makes a multifoil inconel mat that should be good to close to = 2000F.  Of course it is expensive.

 

Al

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy
Sent: Monday, January 05, = 2004 11:17 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = exhaust heat shield

 

Greetings,

=

 

I'm looking into the best = methods for heat shielding around the exhaust pipes.  I'll be squeezing = pipes between the engine mount tube, and cowl, with just less than an inch to = clear on either side.   The closest clearance will be about = 12"-14" from the exhaust port, so it will still be pretty = hot. 

 

In the previous messages = about turbo heat shielding, I learned that some folks are using aluminum foil, = or the commercial temp shielding on the inside of their cowls with = good results.  How close are your pipes to the = cowl?  Will simple aluminum foil protect the cowl from the exhaust pipe just an = inch away? 

 

How about the mount = tube?  I had the stock turbo shield on the rev-1 setup, and there was about an = inch or so of clearance from the heat shield, to the motor mount = tube.  I also wrapped the mount tube with fire sleeve.  When I took it all = apart, the fire sleeve appeared undamaged on the outside, but the inside was = burnt, as was the paint on the mount tube.  I'm wondering if it wouldn't have been = better without the fire sleeve, so it would have had some = airflow.  I've seen the silver heat tape, that can be used to wrap the mount.  = Will this type of material be sufficient? 

 

Thanks,

Rusty (Great alcohol report Jim) 

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