Return-Path: Received: from mtiwmhc13.worldnet.att.net ([204.127.131.117] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2895567 for flyrotary@lancaironline.net; Thu, 18 Dec 2003 00:50:50 -0500 Received: from 204.127.135.42 ([204.127.135.42]) by worldnet.att.net (mtiwmhc13) with SMTP id <20031218055044113005u96ae>; Thu, 18 Dec 2003 05:50:44 +0000 Received: from [12.74.169.25] by 204.127.135.42; Thu, 18 Dec 2003 05:50:44 +0000 From: keltro@att.net To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: evap core versus radiator Date: Thu, 18 Dec 2003 05:50:44 +0000 Message-Id: <121820030550.1712.6eea@att.net> X-Mailer: AT&T Message Center Version 1 (Oct 10 2003) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="NextPart_Webmail_9m3u9jl4l_1712_1071726644" --NextPart_Webmail_9m3u9jl4l_1712_1071726644 Content-Type: text/plain Content-Transfer-Encoding: 8bit Paul, Can you tell us what these evaporators were used in or a part number? Kelly Troyer -- Dyke Delta/13B Rotary Power (in progress) --NextPart_Webmail_9m3u9jl4l_1712_1071726644 Content-Type: Multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_1712_1071726644" --NextPart_Webmail_9m3u9jl4l_1712_1071726644 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Tracy and I are using 5/8" inlets and 3/4" outlets. 4 1/2" is about 1" thicker than what we use. Finn sqpilot@earthlink wrote: > Hi, fellow rotary enthusiasts.....I am confused regarding radiator > versus evaporator cores. Ed Klepeis can make a radiator for me that > measures overall 16 x 10 x 4 1/2, by sandwiching two 2 1/4" thick > cores together. Unfortunately, there are two 2" wide tanks on each > end, which reduces the cooling fin area to 12" x 10" x 4 1/2". I > calculate that to a total area of around 540. > I have found an evap. core that measures 9 x 13 1/2 x 4 5/8" > thick. I believe that comes out to a total area of around 561. That > would fit perfectly in the cowling with even less modifications to > inlets, etc. (Read that as less work for me). I have heard on this > forum that evap. cores are a good choice for cooling, as they can take > high pressures. Is there anything else I should consider regarding > radiator versus evap core for cooling? Inlet and outlet tubes look to > be around 5/8". The core looks just like one from a GM Safari or Astro > Van except for the size difference. I don't know if the 5/8" > inlet/outlet tubes would be too restrictive to flow compared to a > radiator that would be made with 1" NPT inlet/outlets? My guess is > that once the water gets inside either the evap core or the > radiator, flow is going to be restricted by the tubing sizes inside > the cooling device regardless of the inlet/outlet sizes? I know that > Ed Anderson, Tracy and others have had success with evap cores. Any > possible pros and cons would be much appreciated. Thank you for your > time and opinions. Paul Conner --NextPart_Webmail_9m3u9jl4l_1712_1071726644 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit Tracy and I are using 5/8" inlets and 3/4" outlets.
4 1/2" is about 1" thicker than what we use.

Finn

sqpilot@earthlink wrote:

Hi, fellow rotary enthusiasts.....I am confused regarding radiator versus evaporator cores. Ed Klepeis can make a radiator for me that measures overall 16 x 10 x 4 1/2, by sandwiching two 2 1/4" thick cores together. Unfortunately, there are two 2" wide tanks on each end, which reduces the cooling fin area to 12" x 10" x 4 1/2". I calculate that to a total area of around 540.

I have found an evap. core that measures 9 x 13 1/2 x 4 5/8" thick. I believe that comes out to a total area of around 561. That would fit perfectly in the cowling with even less modifications to inlets, etc. (Read that as less work for me). I have heard on this forum that evap. cores are a good choice for cooling, as they can take high pressures. Is there anything else I should consider regarding radiator versus evap core for cooling? Inlet and outlet tubes look to be around 5/8". The core looks just like one from a GM Safari or Astro Van except for the size difference. I don't know if the 5/8" inlet/outlet tubes would be too restrictive to flow compared to a radiator that would be made with 1" NPT inlet/outlets? My guess is that once the water gets inside either the evap core or the radiator, flow is going to be restricted by the tubing sizes inside the cooling device regardless of the inlet/outlet sizes? I know that Ed Anderson, Tracy and others have had success with evap cores. Any possible pros and cons would be much appreciated. Thank you for your time and opinions. Paul Conner

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