Return-Path: Received: from server12.safepages.com ([216.127.146.26] verified) by logan.com (CommuniGate Pro SMTP 4.1) with ESMTP id 2511333 for flyrotary@lancaironline.net; Mon, 04 Aug 2003 17:43:46 -0400 Received: by server12.safepages.com (Postfix, from userid 1012) id 3104B1C70A0; Mon, 4 Aug 2003 21:42:29 +0000 (GMT) Received: from 2b0w201 (1Cust111.tnt24.atl4.da.uu.net [65.227.68.111]) by server12.safepages.com (Postfix) with ESMTP id E95651C7497 for ; Mon, 4 Aug 2003 21:42:24 +0000 (GMT) From: "Tommy James" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Oshkosh Grumps Date: Mon, 4 Aug 2003 17:43:43 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Hi Tracy, Glad you are home safe! Please, give us all a 1-2-3 step procedure on measuring the pressures fore and aft of the rads.. I think Hank and I might need to do this..:-) Tommy<>< TC wrote: Cooling is working really well now. Had a 25 minute ground taxi before departure and water temp was up to 205 when I started my takeoff roll. Temp was already droping as I climbed out. After futzing with cooling systems on the plane for almost 10 years now, I am convinced that the key factor is pressure recovery. If you are having cooling problems, measure the pressure in front of the rad. If it is not a high percentage (at LEAST 60 - 70%) of dynamic airspeed pressure, start working on your inlets and/or ducts. Back side pressure should be fairly low too (mine is about 2" H2O) but front side pressure is the 400 pound gorrilla in airplane cooling.