Return-Path: Received: from out006.verizon.net ([206.46.170.106] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2890612 for flyrotary@lancaironline.net; Sun, 14 Dec 2003 15:20:33 -0500 Received: from netzero.net ([4.11.53.59]) by out006.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20031214202032.EUOV3734.out006.verizon.net@netzero.net> for ; Sun, 14 Dec 2003 14:20:32 -0600 Message-ID: <3FDCC609.3080804@netzero.net> Date: Sun, 14 Dec 2003 15:20:25 -0500 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] evap core versus radiator References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080503040900060403040006" X-Authentication-Info: Submitted using SMTP AUTH at out006.verizon.net from [4.11.53.59] at Sun, 14 Dec 2003 14:20:31 -0600 This is a multi-part message in MIME format. --------------080503040900060403040006 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 --------------080503040900060403040006 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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