Return-Path: Received: from smtp.pipcom.com ([204.92.62.10] verified) by logan.com (CommuniGate Pro SMTP 4.2b3) with ESMTP-TLS id 100062 for flyrotary@lancaironline.net; Tue, 01 Jun 2004 21:18:28 -0400 Received: (qmail 5336 invoked by uid 107); 2 Jun 2004 01:17:42 -0000 Received: from cowcam@pipcom.com by orthanc by uid 64011 with qmail-scanner-1.20 (clamscan: 0.60. Clear:RC:1(204.92.62.175):. Processed in 0.579517 secs); 02 Jun 2004 01:17:42 -0000 Received: from ras3-43.pipcom.com (HELO new) (204.92.62.175) by orthanc.pipcom.com with SMTP; 2 Jun 2004 01:17:41 -0000 Message-ID: <015301c4483f$482154e0$6701a8c0@new> From: "Peter Cowan/Lexy Cameron" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Power loss diagnostics Date: Tue, 1 Jun 2004 21:16:49 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 I'm trying to discover what caused the power loss during my last flight. > There was some black "gum" on the prop. Has anyone seen this before? I'm > beginning to suspect that I was running on one set of plugs, but restricted > fuel flow has also been suggested. > > Anyone who's inclined to apply their knowledge & experience to this, please > take a look at: > > http://canardaviation.com/chap29.htm#diagnostics John, I looked at your site briefly but didn't see any more on the gum. An exhaust leak on a 2 cycle engine burning 50 to 1 does produce a lot of black gummy tar like stuff yet the exhaust passage can be clean as a whistle. Maybe this is similar. Peter