X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx2.netapp.com ([216.240.18.37] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTPS id 4972608 for flyrotary@lancaironline.net; Tue, 10 May 2011 10:29:42 -0400 Received-SPF: none receiver=logan.com; client-ip=216.240.18.37; envelope-from=echristley@att.net X-IronPort-AV: E=Sophos;i="4.64,346,1301900400"; d="scan'208";a="546835741" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx2-out.netapp.com with ESMTP; 10 May 2011 07:28:50 -0700 Received: from [10.98.32.185] (vneelamr-lxp.hq.netapp.com [10.98.32.185] (may be forged)) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id p4AESneQ014750 for ; Tue, 10 May 2011 07:28:50 -0700 (PDT) Message-ID: <4DC94B9C.10409@att.net> Date: Tue, 10 May 2011 10:28:44 -0400 From: Ernest Christley Reply-To: echristley@att.net User-Agent: Thunderbird 2.0.0.24 (X11/20100623) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Stalled again...ignition this time References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Lehanover@aol.com wrote: > Lets us be sure that the trailing plugs fire at the same time or later > than the leading plugs. Never before the leading plugs. Very bad Mojo. > It is mental gymnastics for me every time I look at this. This means that if I use 20*BTDC as my firing point for the leading, the trailing should fire at a number less than 20. Another way to look at it is the mark on the timing wheel for the leading should pass the indicator BEFORE the mark for the trailing. I'm positive I've got that right now. I'm also positive that keeping this stuff straight give me a headache. 0 10 20 TDC -> |****|****|****|****|**** ^ leading plug set point | ^ trailing plug set point |