Return-Path: Received: from relay02.roc.ny.frontiernet.net ([66.133.131.35] verified) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 622523 for flyrotary@lancaironline.net; Wed, 26 Jan 2005 00:29:32 -0500 Received-SPF: pass receiver=logan.com; client-ip=66.133.131.35; envelope-from=canarder@frontiernet.net Received: from filter02.roc.ny.frontiernet.net (filter02.roc.ny.frontiernet.net [66.133.131.177]) by relay02.roc.ny.frontiernet.net (Postfix) with ESMTP id 296B0FFCC for ; Wed, 26 Jan 2005 05:29:02 +0000 (UTC) Received: from relay02.roc.ny.frontiernet.net ([66.133.131.35]) by filter02.roc.ny.frontiernet.net (filter02.roc.ny.frontiernet.net [66.133.131.177]) (amavisd-new, port 10024) with LMTP id 23373-02-22 for ; Wed, 26 Jan 2005 05:29:02 +0000 (UTC) Received: from [127.0.0.1] (70-97-232-197.dsl2.cok.tn.frontiernet.net [70.97.232.197]) by relay02.roc.ny.frontiernet.net (Postfix) with ESMTP id B4782101EE for ; Wed, 26 Jan 2005 05:29:01 +0000 (UTC) Message-ID: <41F72A9C.8020401@frontiernet.net> Date: Tue, 25 Jan 2005 23:29:00 -0600 From: Jim Sower User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040514 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: FW: Re: Plugs and Mags References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Antivirus: avast! (VPS 0504-0, 01/25/2005), Outbound message X-Antivirus-Status: Clean X-Virus-Scanned: by amavisd-new-20040701 (2.0) at filter02.roc.ny.frontiernet.net Almost certainly not. So how about, at least on the shrouded plug, select a much hotter plug and see if it will burn off. From inside that shroud I would seriously doubt it could cause anything like detonation. Would a propane torch be hot enough to burn off the deposits on the ceramic, or would you really need an oxifuel torch? There HAS to be a way ... Jim S. WRJJRS@aol.com wrote: >Not certain that reciprocating engines have the same problems as their plugs >are not as shrouded as ours so combustion process probably help keeps >blowing off deposits on the ceramic center cone. > >FWIW > >Ed A > >Ed, The piston engine plug is exposed and the heat range is calculated to allow the deposits to burn off. It does seem obvious but it is amazing how many racers just don't have a handle on hot plugs/cold plugs. >Bill Jepson > > > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html >>> >>> > > > >