X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2491431 for flyrotary@lancaironline.net; Fri, 16 Nov 2007 09:14:40 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=echristley@nc.rr.com Received: from [192.168.0.19] (really [66.57.38.121]) by cdptpa-omta01.mail.rr.com with ESMTP id <20071116141403.KIAX6760.cdptpa-omta01.mail.rr.com@[192.168.0.19]> for ; Fri, 16 Nov 2007 14:14:03 +0000 Message-ID: <473DA5BA.7080901@nc.rr.com> Date: Fri, 16 Nov 2007 09:14:18 -0500 From: Ernest Christley User-Agent: Thunderbird 1.5.0.14pre (X11/20071023) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] heat exchanger placement References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Andrew Martin wrote: > Hi > Following on from this thin vs thick radiator discussion. What's the > general consensus on placement of the heat exchanger/s? Seems to me the > most efficient WW11 planes had the exchangers mounted under the wing or > fuselage but nearly everyone here is placing them under the cowl, is the > reason for this just because its an easier installation to make, or is > it no less efficient at our power/speed. > My aim is to minimize total drag even if it means a longer build time to > get the installation correct, current thoughts are to place a short > thick coolant exchanger under the fuselage and have a clean tight > fitting cowl with only inlets for induction and oil heat exchanger, > hopefully there will be enough air going through the oil exchanger to > keep under cowl temps reasonable. > Am I just plane crazy? > Regards Andrew Martin. > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > > Here's a little bedtime reading for ya': http://ernest.isa-geek.org/Delta/Library/naca-report-WingDuctCooling.pdf http://ernest.isa-geek.org/Delta/Library/naca-report-WingRadiators.pdf http://ernest.isa-geek.org/Delta/Library/WartimeReport_DesignSelectionAndInstallationOfAircraftHeatExchangers.pdf http://ernest.isa-geek.org/Delta/Library/TheDesignOfCoolingDuctsWithSpecialReferenceToTheBoundaryLayerAtTheInlet.pdf