X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: \eX-PolluStop-Score: 0.00\eX-PolluStop: Scanned with Niversoft PolluStop 2.1 RC1, http://www.niversoft.com/pollustop Return-Path: Received: from [65.110.14.105] (HELO mail2) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 860652 for flyrotary@lancaironline.net; Thu, 07 Apr 2005 13:59:13 -0400 Received-SPF: softfail receiver=logan.com; client-ip=65.110.14.105; envelope-from=echristley@nc.rr.com Received: from atp (unverified [65.110.14.115]) by mail2 (Rockliffe SMTPRA 4.2.2) with ESMTP id for ; Thu, 7 Apr 2005 11:02:44 -0700 Message-ID: <12842832.1112898176296.JavaMail.Administrator@atp> Date: Thu, 7 Apr 2005 11:22:56 -0700 (PDT) From: echristley Reply-To: echristley@nc.rr.com To: flyrotary@lancaironline.net Subject: Re: [FlyRotary] Re: rule of thumb and RV-3 sizes- was Cooling Inlet Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: E-mailanywhere V2.0 (Windows) >On Thu, 07 Apr 2005 12:06:29 -0400 Tracy Crook wrote. >MessageThis does "sound right" but the few studies I've seen showing the >exit air temp on air cooled engines was very close to what water cooled >engines have been. > This is completely logical if you consider the extremely small surface area available to transfer heat on the cylinderhead fins compared to the surface area on even a small radiator.