X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp113.sbc.mail.mud.yahoo.com ([68.142.198.212] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with SMTP id 1315865 for flyrotary@lancaironline.net; Tue, 25 Jul 2006 20:21:38 -0400 Received-SPF: none receiver=logan.com; client-ip=68.142.198.212; envelope-from=dcarter11@sbcglobal.net Received: (qmail 43821 invoked from network); 26 Jul 2006 00:20:52 -0000 Received: from unknown (HELO davidsdell8200) (dcarter11@sbcglobal.net@71.213.95.11 with login) by smtp113.sbc.mail.mud.yahoo.com with SMTP; 26 Jul 2006 00:20:51 -0000 Message-ID: <028a01c6b049$585dc7c0$0701a8c0@davidsdell8200> From: "David Carter" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: More cooling Tests Date: Tue, 25 Jul 2006 18:20:47 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0287_01C6B017.0CD74A10" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 This is a multi-part message in MIME format. ------=_NextPart_000_0287_01C6B017.0CD74A10 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Lynn, I understand the concept of radiant heat shields and like the idea = of fabricating custom shields to put where I need them. . . . I can't visualize the "3 z shaped tabs" and how to attach them to = an exhaust pipe with 1/4" hose clamps and have 3/4 inch air gap between = pipe and shield. David ----- Original Message -----=20 From: Lehanover@aol.com=20 To: Rotary motors in aircraft=20 Sent: Tuesday, July 25, 2006 9:41 AM Subject: [FlyRotary] Re: More cooling Tests In a message dated 7/25/2006 10:41:38 A.M. Eastern Daylight Time, = rlwhite@comcast.net writes: Thanks for the link Steve. Interesting stuff. Bob W. The closer to pure (distilled) water the better the heat transfer = rate. If higher boiling temps are required then a 10% glycol water = mixture with a teaspoon of dishwashing soap or Redline Water Wetter and = a 22 pound pressure cap on a pressure make up tank. For radiant heat transfer make up some rectangles of .015" stainless = with three tabs on each end. Roll the sheet into a half tube shape. Bend = the tabs into a "Z" shape and use a 1/4" hose clamp to hold each set of = tabs to the exhaust pipe. Just a 3/4" space between the pipe and the = shield is enough to break the radiant path.=20 The hot rod heat wrap tape works great, but the pipe needs to be thick = walled lest it decompose quickly. The pipe will be running at your EGT, = all of the time. Wet it before installing on curved pipe. It conforms = more easily. Let it dry before starting the engine. I lace it with safety wire after installation. It stays on for a race = season, and makes an astounding difference in under-hood temperatures.=20 Fuel temps too high make tuning impossible. Been there, done that.=20 Lynn E. Hanover ------=_NextPart_000_0287_01C6B017.0CD74A10 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Lynn, I understand the concept of radiant heat shields and like the = idea of=20 fabricating custom shields to put where I need them.
. . . I can't visualize the "3 z shaped tabs" and how to = attach them=20 to an exhaust pipe with 1/4" hose clamps and have 3/4 inch air gap = between pipe=20 and shield.
 
David
----- Original Message -----
From:=20 Lehanover@aol.com
Sent: Tuesday, July 25, 2006 = 9:41=20 AM
Subject: [FlyRotary] Re: More = cooling=20 Tests

In a message dated 7/25/2006 10:41:38 A.M. Eastern Daylight Time, = rlwhite@comcast.net = writes:
Thanks=20 for the link Steve.  Interesting stuff.

Bob=20 W.

 
 
The closer to pure (distilled) water the better the heat transfer = rate.=20 If higher boiling temps are required then a 10% glycol water mixture = with a=20 teaspoon of dishwashing soap or Redline Water Wetter and a 22 pound = pressure=20 cap on a pressure make up tank.
 
For radiant heat transfer make up some rectangles of .015" = stainless with=20 three tabs on each end. Roll the sheet into a half tube shape. Bend = the tabs=20 into a "Z" shape and use a 1/4" hose clamp to hold each set of tabs to = the=20 exhaust pipe. Just a 3/4" space between the pipe and the shield is = enough to=20 break the radiant path.
 
The hot rod heat wrap tape works great, but the pipe needs to be = thick=20 walled lest it decompose quickly. The pipe will be running at your = EGT, all of=20 the time. Wet it before installing on curved pipe. It conforms more=20 easily. Let it dry before starting the engine.
I lace it with safety wire after installation. It stays on for a = race=20 season, and makes an astounding difference in under-hood=20 temperatures. 
 
Fuel temps too high make tuning impossible. Been there, done=20 that. 
 
Lynn E. Hanover
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