Return-Path: Received: from [129.116.87.171] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 4.2.8) with ESMTP id 621132 for flyrotary@lancaironline.net; Tue, 25 Jan 2005 11:22:32 -0500 Received-SPF: none receiver=logan.com; client-ip=129.116.87.171; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: RE: [FlyRotary] Re: FW: Re: Plugs and Mags Date: Tue, 25 Jan 2005 10:22:02 -0600 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69EC07E81@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: FW: Re: Plugs and Mags Thread-Index: AcUC9wwk9DXFgpdGQumCmrpso1Vy1wAAs2CA From: "Mark R Steitle" To: "Rotary motors in aircraft" Ed,=20 Can you give me the p/n's for the platinum plugs? Mark S. -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: Tuesday, January 25, 2005 10:03 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: FW: Re: Plugs and Mags Mark, I have not used the iridium plug - the reason is I am using Platinum plugs and come nowhere close to wearing them out before replacing them. The problem is not so much wear as SAG (SparkPlug Attention Getter), that appears to be caused by fouling on the ceramic cone causing leakage of the spark pulse before it builds sufficient voltage to jump the gap. Using 100LL they will foul in 25-30 hour of running, using MoGas Tracy Crook gets over 100hours. Using 100LL the fouling is apparently caused by lead deposits building up on the cone and with Mogas its carbon deposits. I have save the plugs thinking I will clean them off and reuse them - but the normally cleaning ( blasting) will probably cause more wear than usage. Been looking for some solvent that would dissolve lead deposits without eating the spark plug metal - have not found it yet. 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 ----- Original Message ----- From: "Mark R Steitle" To: "Rotary motors in aircraft" Sent: Tuesday, January 25, 2005 10:18 AM Subject: [FlyRotary] FW: Re: Plugs and Mags I'm forwarding a message from the Lancair list concerning iridium spark plugs. They're saying that they last 2,000 hours in their certified engines. Has anyone tried these in the rotary? Are they even available for the rotary? Mark S. Subject: [LML] Re: Plugs and Mags I have been using iridium plugs for about 500 hours and they haven't needed to be adjusted yet. I am told that they will last over 2,000 hours. >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html