X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.2c2) with ESMTP id 2470293 for flyrotary@lancaironline.net; Tue, 13 Nov 2007 14:29:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Received: from edward2 ([24.74.103.61]) by cdptpa-omta01.mail.rr.com with SMTP id <20071113192845.YLRR6760.cdptpa-omta01.mail.rr.com@edward2> for ; Tue, 13 Nov 2007 19:28:45 +0000 Message-ID: <000d01c8262b$b600e3e0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Rebutal to the rebutal {:>) Thick vs Thin was : Diffuser Configuration Comparison Date: Tue, 13 Nov 2007 14:30:55 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 Hi Blake, Well, unfortunately we run into a thermodynamic limit in that the closer the air temperature gets to the coolant (actually the core metal) temperature, the less heat gets transferred from coolant to the air. But, if you can figure some way to refrigerate the air to about - 200F then we can really get rid of some heat {:>). One of the things that makes this stuff so interesting (as well frustrating) is that we are trying to use simplified models of a very complex physical process to work with. I always say just remember that models are nothing more than dumbed-down version of the real world. Don't be surprised that they don't always give you the same answer. I wish I had taken a course in Fluid dynamics at some point in my checkered career, but guess I'm sort of doing that now {:>). Ed ----- Original Message ----- From: "Blake Lewis" To: "Rotary motors in aircraft" Sent: Tuesday, November 13, 2007 2:03 PM Subject: [FlyRotary] Re: Rebutal to the rebutal {:>) Thick vs Thin was : Diffuser Configuration Comparison > If we get an even better core, we can take a DeltaT of 300F. > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >