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 5.4.5) with ESMTPS id 5517759 for flyrotary@lancaironline.net; Tue, 01 May 2012 13:17:51 -0400 Received-SPF: none receiver=logan.com; client-ip=216.240.18.37; envelope-from=echristley@att.net X-IronPort-AV: E=Sophos;i="4.75,512,1330934400"; d="scan'208";a="644555887" Received: from smtp2.corp.netapp.com ([10.57.159.114]) by mx2-out.netapp.com with ESMTP; 01 May 2012 10:17:14 -0700 Received: from [10.62.16.167] (ernestc-laptop.hq.netapp.com [10.62.16.167]) by smtp2.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id q41HHD8A013912 for ; Tue, 1 May 2012 10:17:14 -0700 (PDT) Message-ID: <4FA01A71.9030305@att.net> Date: Tue, 01 May 2012 13:16:33 -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: It won't run no more References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Lehanover@aol.com wrote: > The rotary when parked has the exhaust ports open to the exhaust system. > So the inside of the engine is available to mice and spiders and air > with moisture in it. So every so often an apex seal will get rusted into > the slot and after one revolution will stick in the lowest position in > its cycle. Then you have a low compression on one or both rotors. Note > that one leaking apex seals affects two combustion chambers. > Pulling the blade through one revolution give me a little more that six solid ker-chunks from the engine with my 3.14 gearbox ratio. Would that indicate a good seal, or with that just be an unreliable first approximation?