Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Thu, 18 Nov 2004 00:17:54 -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 4.2.5) with ESMTP id 536888 for lml@lancaironline.net; Wed, 17 Nov 2004 23:50:07 -0500 Received-SPF: pass receiver=logan.com; client-ip=207.109.1.8; envelope-from=Christopher.Zavatson@udlp.com Received: from asdmngwia.mpls.udlp.com (asdmngwia.mpls.udlp.com [10.1.62.22]) by mta-out-1.udlp.com (8.12.10/8.12.10) with ESMTP id iAI2sBu2013693 for ; Wed, 17 Nov 2004 20:54:11 -0600 Received: from DM-MN-06-MTA by asdmngwia.mpls.udlp.com with Novell_GroupWise; Wed, 17 Nov 2004 22:49:31 -0600 X-Original-Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.2 X-Original-Date: Wed, 17 Nov 2004 22:49:12 -0600 From: "Christopher Zavatson" X-Original-To: Subject: [LML] Re: Halon fire extinquishers Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline Ron, << If I shut of the fuel. Discharged a 2.5 pound bottle in the air stream around the cowl openings. Would this from your experience have a chance at putting out the fire?>> I finally had the opportunity to run some numbers using the 360 as a baseline and found the chance of success with a 2.5 lb bottle to be very slim. At cruise speed, there is no way to maintain the needed concentration for any significant length of time. Slowed to 80 kts, with a metered discharge rate, you can only get half the duration I would consider the bare minimum to even have a shot. A better approach might be to put the emphasis on detection. I suspect that most engine fires are not detected for some time since the airflow naturally carries the fire underneath the plane and out of view of the pilot. If the engine keeps running, melting floor board may be the first sign of trouble. Chris Zavatson