Folks might also want to check out the testing done via the link below.  It highlights many of the experiences already mentioned and a couple more.
http://www.norosion.com/evanstest.htm

Luis Luciano

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Thursday, October 10, 2013 2:15 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: waterless coolant?

You might want to check what happens to the viscosity of this fluid at lower temperatures.  Its been a while, but as I recall this fluid  turns into heavy syrup at lower temps.  You can visualize your water pump churning (cavitating)  in a void of this fluid at low temperatures while not moving any through your cooling system.  The fluid next to the rotors would undoubtedly get hot  -while that in the radiator and water pump may act as a (Temporary) plug to coolant flow – until the heated fluid explosively forces the issue.

I tried finding the viscosity charts they used to have on the site, but could not find it. My impression when I looked into this fluid back a few years ago, was that this heavy viscosity at low temps was probably not much of a draw back  compared to the benefits in a racing motor – heated garage, summer temps, etc.  But, might be a different story for aircraft application.

Ed

Edward L. Anderson
Anderson Electronic Enterprises LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com


From: Gordon Alling <mailto:gordon@acumen-ea.com>  Sent: Thursday, October 10, 2013 1:05 PM
To: Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>  Subject: [FlyRotary] Re: waterless coolant?


This appears interesting.  I looked at the website and was unable to find the heat capacity of the fluid.  The higher boiling temp may not be helpful if the heat capacity is such that you need a large delta T to transfer the same amount of heat as a water-based system.



One must also consider the effect of the higher operating temperature on engine oils.  At some temperature, oil loses its lubrication ability.  I don’t know what that temp is but assume it is different for different oils.  Just because the coolant allows higher operating temperatures, doesn’t mean one should do that.



Gordon C. Alling, Jr., PE

President

acumen Engineering/Analysis, Inc.



540-786-2200

www.acumen-ea.com



From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Michael Silvius
Sent: Thursday, October 10, 2013 1:19 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] waterless coolant?



While on the subject of cooling, I am curious if anyone has tried the waterless coolant? Seems to offer some advantages, namely higher boiling boint and low pressure, is there any reason it should not be used in our aplication?

http://www.evanscooling.com/



Michael

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