X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 01 Jan 2006 22:53:35 -0500 Message-ID: X-Original-Return-Path: Received: from mta-out-1.udlp.com ([207.109.1.8] verified) by logan.com (CommuniGate Pro SMTP 5.0.5) with ESMTP id 907948 for lml@lancaironline.net; Sun, 01 Jan 2006 11:33:08 -0500 Received-SPF: none receiver=logan.com; client-ip=207.109.1.8; envelope-from=Christopher.Zavatson@baesystems.com Received: from mnexch01.MSGDOMAIN.MPLS.UDLP.COM ([10.1.62.20]) by mta-out-1.udlp.com (8.12.10/8.12.10) with ESMTP id k01GEAbk013903 for ; Sun, 1 Jan 2006 10:14:10 -0600 Received: from asdmngwia.udlp.com ([10.1.62.22] RDNS failed) by mnexch01.MSGDOMAIN.MPLS.UDLP.COM with Microsoft SMTPSVC(6.0.3790.211); Sun, 1 Jan 2006 10:27:59 -0600 Received: from DM-MN-06-MTA by asdmngwia.udlp.com with Novell_GroupWise; Sun, 01 Jan 2006 10:32:15 -0600 X-Original-Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.5.4 X-Original-Date: Sun, 01 Jan 2006 10:32:02 -0600 From: "Christopher Zavatson" X-Original-To: Subject: Re: [LML] Re: LNC2 IO360 air cooling requirements Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-OriginalArrivalTime: 01 Jan 2006 16:27:59.0292 (UTC) FILETIME=[541F5FC0:01C60EF0] Angier, Lots of good questions here: In did reduce my inlet size and did pick up = 5 kts, but what lies down stream of the inlets will have a more significant= impact on drag than the small change in the inlet diameter. Any leak in = the system will allow more air to flow through the inlets. This causes = the inlet velocity ratio to go up. Shrinking the inlet diameter also = causes the inlet velocity ratio to rise. As this occurs, more pressure = recovery is done behind the inlet rather than in front of it. Pressure = recovery downstream of the inlet is more difficult and will require good = diffusers. A 100% sealed cooling system requires surprisingly small = inlets. NASA report CR 3405 is a real eye opener on some of these topics. = Here is a link (large file, 8MB) http://www.n91cz.com/cooling/Copy_of_NASA_Cooling_Report.pdf Chris Zavatson N91CZ 360 std www.N91CZ.com