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Date: Fri, 13 Aug 2004 06:58:15 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
From: Joseph M Berki <Joseph.M.Berki@grc.nasa.gov>
Subject: Evaporator cores, in search of
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Well I now have 3 different GM cores to play with.  The first one I 
acquired was very large at 3.75" thick.  The next one was the same in the 
length width dimension but was 2.75" thick. Large one has a cooling volume 
od 300 cid, the next one is 220 CID and the small one is 186 cid which I 
think would make a good oil cooler. I decided that some testing should be 
done to select the proper unit.  The radiator and oil cooler will be 
mounted to a frame inside of a belly scoop.  The whole assembly will be 
removable from the airframe.  That way changes can be made without bringing 
the A/C home into the shop.  I would like to build this unit up and 
instrument it with a manometer and mount it to a vehicle and road test 
it.  With the three different types, flows through each core can be 
compared.  It would also test the scoop duct design.  Is this worth 
doing?  Am I making this harder than it should be?  I have a picture of the 
front view of Rusty's RV in the shop and I really like the idea of one size 
evaporator fits all. Rusty, keep us posted on cooling data.  Thanks for any 
help.


Joe Berki
Limo EZ