X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.netapp.com ([216.240.18.37] verified) by logan.com (CommuniGate Pro SMTP 5.3.1) with ESMTPS id 4080397 for flyrotary@lancaironline.net; Tue, 12 Jan 2010 17:18:01 -0500 Received-SPF: softfail receiver=logan.com; client-ip=216.240.18.37; envelope-from=echristley@nc.rr.com X-IronPort-AV: E=Sophos;i="4.49,264,1262592000"; d="scan'208";a="301119442" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx2-out.netapp.com with ESMTP; 12 Jan 2010 14:16:55 -0800 Received: from [10.62.16.83] (ernestc-laptop.hq.netapp.com [10.62.16.83]) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id o0CMGsZ8017821 for ; Tue, 12 Jan 2010 14:16:54 -0800 (PST) Message-ID: <4B4CF4D5.6060906@nc.rr.com> Date: Tue, 12 Jan 2010 17:16:53 -0500 From: Ernest Christley Reply-To: echristley@nc.rr.com User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Scoops References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit tonyslongez@cox.net wrote: > Jeff > > Aren't we just stalling the air? As if in a high AOA? and if so can't we optimize that with different diffuser airfoils? > > Tony > Tony, why your depiction leaves out is the big blockage to free airflow, otherwise known as the radiator. If that airflow was in a free stream, it would do exactly as your curly lines depict. But it isn't in a free stream. It has that radiator spanning the whole area, blocking the air's progression, and pushing it to the side. It is the pressure at the center of the radiator acting to push air to the side that keeps the flow laminar. > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------ > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >