X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.25.9.101] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1413896 for flyrotary@lancaironline.net; Thu, 21 Sep 2006 16:31:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-100-038.carolina.res.rr.com [24.74.100.38]) by ms-smtp-02.southeast.rr.com (8.13.6/8.13.6) with SMTP id k8LKTvDk003937 for ; Thu, 21 Sep 2006 16:29:59 -0400 (EDT) Message-ID: <001701c6ddbc$ddf2b9e0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: It runs! Date: Thu, 21 Sep 2006 16:31:06 -0400 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Virus-Scanned: Symantec AntiVirus Scan Engine Bob, I have no experience with the ignition on the 20B. However, I suspect that some of the sparks you are seeing may be "waste sparks". The 13B uses the "waste Spark" on the trailing plugs - the spark plug fires but it is during the exhaust stroke - so has no effect, but does simply the ignition design. So the sparks you are seeing that surprise you may be "waste sparks". OR you could have an ignition problem. Ed ----- Original Message ----- From: "Bob Darrah" To: "Rotary motors in aircraft" Sent: Thursday, September 21, 2006 4:02 PM Subject: [FlyRotary] Re: It runs! > 20B It still runs, but not good. Thanks for all your suggestions. New > gas with exactly measured oil made no difference. > > However, I put the timing light on each of the plug leads and was really > confused at what I saw. > #1, both lead and trail, 35 degrees before TDC So good so far. > #2, " " " " mostly 35 degrees Btdc, and an > ocasanal 120 off from that > # 3 A lot of 240 degrees (about where > it should be) and a lot at 35 Btdc. > > After looking at that, I am surprised it runs at all. And Tracy won't be > back till next week. I am hopeing that the extra length of my embilical > cord from the firewall to engine (Seawind) accounts for all of that, but I > have a hard time convincing myself that is so. > > > Any other good ideas????? > > Bob Darrah > Seawind/20B > Near Austin, TX > > (But my spell checker said it was ok) > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >