X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta05.westchester.pa.mail.comcast.net ([76.96.62.48] verified) by logan.com (CommuniGate Pro SMTP 6.0.7) with ESMTP id 6510119 for flyrotary@lancaironline.net; Thu, 10 Oct 2013 13:05:57 -0400 Received-SPF: none receiver=logan.com; client-ip=76.96.62.48; envelope-from=gordon@acumen-ea.com Received: from omta05.westchester.pa.mail.comcast.net ([76.96.62.43]) by qmta05.westchester.pa.mail.comcast.net with comcast id bS4t1m0020vyq2s55V5Ndb; Thu, 10 Oct 2013 17:05:22 +0000 Received: from HPElitebook ([76.123.51.236]) by omta05.westchester.pa.mail.comcast.net with comcast id bV5N1m00M55mGuc3RV5Njk; Thu, 10 Oct 2013 17:05:22 +0000 From: "Gordon Alling" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] waterless coolant? Date: Thu, 10 Oct 2013 13:05:19 -0400 Message-ID: <007201cec5da$e63ccdd0$b2b66970$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0073_01CEC5B9.5F2B2DD0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac7F1OqZZJzwswGJQ4Sx7TEmKH5r6wABSHlQ Content-Language: en-us DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1381424722; bh=yEzvluuR/JCrdy1vDm35DJI2sMa05IkDOGgNRVt/bQw=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=VcsPbgZTbWpM795zhKUemg1Q46eJDrN4EXfZgGgIjitr9U/hHgMgJ35Umn/Gp1jwX veAYySXlv1pAuKOll98w6Enqvu5R/UL0+OiDK5uTRsSbWapWspEIlBDCG0+ops6FA/ Nw/xT/T9MI186Vdd5Ca1e/KsgSp9xc2skw46onuHEWtmuwAG1vqXVxpjEZnobBLrnI pAmWeIXFz2ZMTPH/DMzAQb4cfIAa8nGz8+RaYwMCmsrQ17HD6kG9TMDJrNxSYWL3Rx 0xsAPKbOKQ3SOObsJFsI5lkv0LsSVyfLGJ58FuO4lIVaHqMcJf7Gj78prfTVQlcov6 gVg7Y5tBRR5+A== This is a multi-part message in MIME format. ------=_NextPart_000_0073_01CEC5B9.5F2B2DD0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 ------=_NextPart_000_0073_01CEC5B9.5F2B2DD0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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

a= cumen E= ngineering/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?

 

Michael

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