X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail05.syd.optusnet.com.au ([211.29.132.186] verified) by logan.com (CommuniGate Pro SMTP 5.2.2) with ESMTPS id 2880842 for flyrotary@lancaironline.net; Thu, 01 May 2008 20:15:00 -0400 Received-SPF: pass receiver=logan.com; client-ip=211.29.132.186; envelope-from=lendich@optusnet.com.au Received: from george (d220-237-232-70.dsl.nsw.optusnet.com.au [220.237.232.70]) by mail05.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id m420EFua027140 for ; Fri, 2 May 2008 10:14:15 +1000 Message-ID: <002601c8abe9$793141a0$6400a8c0@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: radiator orientation? Date: Fri, 2 May 2008 10:14:22 +1000 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="Windows-1252"; 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 V6.00.2900.3198 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean > Geroge: > > In the end I will likely angle them a bit but my primary concern is if it > is > ok to install these radiators in the vertical orientation. I have the > space > up and down to use them this way. The nose bowl I have seems to work well > with things set up that way. > > Michael Michael, Vertically is OK, there were some articles on sloped rads, they induce turbulence in the fins which causes better heat transfer but the slope ( I think it said) 20-30 degrees decrease cooling and increase drag, over 30 degrees things improve, at approx 55 degrees cooling efficiency is 30 % greater than non inclined and drag is less than in 20degrees. HTH George ( down under)