Mailing List flyrotary@lancaironline.net Message #14957
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: oi/water Exchanger [FlyRotary] Re: fluidyne oil cooler
Date: Fri, 7 Jan 2005 14:19:55 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
[FlyRotary] Re: fluidyne oil cooler
The bottom line as we know is that ultimately the air flow has to carry all the heat away from the installation.  So oil to water heat exchangers end up needing (as Ken points out) a larger radiator (possibly 1/3 larger) to handle the additional heat dumped into the coolant by the oil/water exchanger.. 
 
I believe that oil/water heat exchangers might be justified in an aircraft installation if for some reason the lay-out precluded getting air to an oil cooler but did permit you to install a larger radiator capable of handling the heat load for the coolant and oil.  Otherwise, I don't believe they would work very well in most of our installations.  There could be exceptions of course.
 
My $0.02
 
Ed Anderson
 
----- Original Message -----
From: Ken Welter
Sent: Friday, January 07, 2005 1:24 PM
Subject: [FlyRotary] Re: fluidyne oil cooler

  I tried a 85,000 btu fluidyne oil to water heat exchanger but it sent my water temp through the roof so I abandoned it as I would have had to increase the radiator size.
 If anyone is interested I would sell it for $200
  Ken






Al, yes C&R makes their own oil-to-water coolers.  I have never talked to them to ask about pressure drop on the oil side.  They sure build good looking stuff though (how's that for scientific!!!(grin)).

Ken Powell
Bryant, Arkansas
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