X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from sj-iport-3.cisco.com ([171.71.176.72] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1029875 for flyrotary@lancaironline.net; Fri, 10 Mar 2006 16:38:09 -0500 Received-SPF: softfail receiver=logan.com; client-ip=171.71.176.72; envelope-from=echristley@nc.rr.com Received: from sj-core-1.cisco.com ([171.71.177.237]) by sj-iport-3.cisco.com with ESMTP; 10 Mar 2006 13:37:25 -0800 X-IronPort-AV: i="4.02,181,1139212800"; d="scan'208"; a="414521648:sNHT34918572" Received: from xbh-rtp-211.amer.cisco.com (xbh-rtp-211.cisco.com [64.102.31.102]) by sj-core-1.cisco.com (8.12.10/8.12.6) with ESMTP id k2ALbMwB016668 for ; Fri, 10 Mar 2006 13:37:25 -0800 (PST) Received: from xfe-rtp-202.amer.cisco.com ([64.102.31.21]) by xbh-rtp-211.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.211); Fri, 10 Mar 2006 16:37:22 -0500 Received: from [64.102.38.229] ([64.102.38.229]) by xfe-rtp-202.amer.cisco.com with Microsoft SMTPSVC(6.0.3790.211); Fri, 10 Mar 2006 16:37:22 -0500 Message-ID: <4411F191.1000704@nc.rr.com> Date: Fri, 10 Mar 2006 16:37:21 -0500 From: Ernest Christley Reply-To: echristley@nc.rr.com User-Agent: Mozilla Thunderbird 1.0.7-1.4.1 (X11/20050929) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: NACA's, Cooling and Sport Aviation Mag.. References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 10 Mar 2006 21:37:22.0334 (UTC) FILETIME=[D0A5CBE0:01C6448A] James wrote: > Ernest, I did not see that specific paper. Do you know an easy to > find it? Thanks. > > Regards; James Freeman > > Ernest Christley wrote: > >> James wrote: >> >>> Second point: I believe that a reversed direction NACA scoop would >>> make an excellent low drag exit port for the cooling air stream. If >>> anyone tries it, please let us know your findings. >> >> >> >> According to the article, NACA tried it. It didn't work very well. >> A straight sided 'boxy' exit works much better. > The Sport Aviation article referred to it. I took the author's word for it because I seem to recall having read such a paper before. I would have to search the NACA site to find it again. -- ,|"|"|, Ernest Christley | ----===<{{(oQo)}}>===---- Dyke Delta Builder | o| d |o www.ernest.isa-geek.org |