X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtpauth03.mail.atl.earthlink.net ([209.86.89.63] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTP id 718796 for flyrotary@lancaironline.net; Sun, 11 Sep 2005 21:43:02 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.63; envelope-from=Dastaten@earthlink.net Received: from [24.238.206.157] (helo=earthlink.net) by smtpauth03.mail.atl.earthlink.net with asmtp (Exim 4.34) id 1EEdKr-0003Xc-8W for flyrotary@lancaironline.net; Sun, 11 Sep 2005 21:42:17 -0400 Message-ID: <4324DCC0.7090300@earthlink.net> Date: Sun, 11 Sep 2005 20:41:20 -0500 From: David Staten User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Optimal GPM water pump flow. References: In-Reply-To: Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit X-ELNK-Trace: 9a30bff84e6cb88f95c85d38d22416599ef193a6bfc3dd489325f295785dded230bf8d1dc20d4ce3133ed92d71017c35350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 24.238.206.157 Al.
What I am after is trying to determine what the minimum required flow is for the horsepower generated. More than anything else, I do not want to be BELOW that amount, and consider it a minimum. Understandably, trying to place twice or nearly 3 times the flow through the same circuit will result in higher pressures and perhaps some pump cavitation. I will deal with that as I have to.. more than anything else I want to make sure I am not starting off with a DEFICIT of water flow ability.

I am considering 2 smaller radiators, and originally I intended to plumb them in series to get the best cumulative Delta-T across them, but if I have "pressure" problems due to the pump's flow, I may go to a parralel arrangement.

Feel free to critique, Al.. My cooling system is a work in progress that is evolving. I live in a place that has 100 degree temps with 90% humidity at times, and given the other folks demonstrated problems with inadequate cooling, I am very much in favor of designing in excess cooling capacity, to the point I may even incur a slight weight or drag penalty, such that I don't have to give constant attention to the risk of overheating.

Dave

Al Gietzen wrote:

Subject: [FlyRotary] Re: Optimal GPM water pump flow.
www.racemate.com   They were unable to find the photo of the Mazda install but they say the did a few. I am going to take the plunge and get one.. 



Dave
 
Just curious what you’re after with the racemate.  You were asking about “optimal” flow – double the needed flow is not optimum; high pressure gradients around the loop, unnecessary pumping power.
 
Al
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