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Date: Thu, 16 Dec 2004 08:14:56 -0500
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Joseph M Berki <Joseph.M.Berki@grc.nasa.gov>
Subject: Cooling
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Each airframe has it's own design form, fit, function limitations for the 
cooling system.  In the case of the Limo EZ, it is difficult to fit a Mazda 
oil cooler and a radiator with adequate volume.  Proper ducting and two 
types of heat exchanges will inhibit airflow and cooling through the 
system.  In searching for a radiator I found that NASCAR uses oil to air 
exchanges in conjunction with radiators to take care of cooling (C&R 
catalog).  I know that this was talked about before. Tracy experimented 
with water cooling the oil pan.  C&R integrates a 13 plate unit into the 
rad.  There are also remote mounted, 22 plate external oil to water 
exchangers available.  By using the available duct space for one rad, it 
could be 20" X 18" X 2.75"thick.  The duct would have only one core to 
provide uniform airflow to. Any thoughts on this?  Another observation; we 
use the 20" X 4" 2nd gen oil cooler successfully yet Mazda makes a 20" X 
6.5" cooler for racing.  Racing places more heat loads into the system then 
an aircraft application?  Thanks for any help.

Joe Berki
Limo EZ