X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 5.0c1) with ESMTP id 678749 for flyrotary@lancaironline.net; Tue, 23 Aug 2005 08:22:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=sladerj@bellsouth.net Received: from ibm62aec.bellsouth.net ([65.8.217.112]) by imf20aec.mail.bellsouth.net with ESMTP id <20050823122124.UMWZ3116.imf20aec.mail.bellsouth.net@ibm62aec.bellsouth.net> for ; Tue, 23 Aug 2005 08:21:24 -0400 Received: from JSLADE ([65.8.217.112]) by ibm62aec.bellsouth.net with ESMTP id <20050823122123.QZZU1144.ibm62aec.bellsouth.net@JSLADE> for ; Tue, 23 Aug 2005 08:21:23 -0400 From: "John Slade" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: Fire extinguishers Date: Tue, 23 Aug 2005 08:21:17 -0400 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 >the only way to keep the fire out is to keep the air out >being able to shut the cooling air flow, at the exit or intake will help a lot. I'm trying to put this in perspective. Assuming no way to shut off the intake air, is firing a halon extinguisher in flight going to have ANY worthwhile impact on an engine fire? Keep in mind that the fiberglass cowl is likely to be breached early on, thus any control of airflow is lost. I'm beginning to think that the most important issues here are detection, and removal of the source (fuel) and that an extinguisher would be useful to save the plane once landed, but worthless (and wasted) if used while airborne. Thinking of fire makes me glad I built a pusher. John