X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.129.170.194] (HELO VIRCOM1.fcdata.private) by logan.com (CommuniGate Pro SMTP 5.4c2o) with ESMTP id 4871189 for flyrotary@lancaironline.net; Tue, 15 Feb 2011 11:58:44 -0500 Received-SPF: none receiver=logan.com; client-ip=64.129.170.194; envelope-from=cbarber@texasattorney.net Received: from FCD-MAIL06.FCDATA.PRIVATE ([fe80::697f:d6aa:b87:78d8]) by FCD-MAIL05.FCDATA.PRIVATE ([fe80::809d:a06e:5913:452e%15]) with mapi id 14.01.0270.001; Tue, 15 Feb 2011 10:53:56 -0600 From: Chris Barber To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Ceramic Apex Seals....curiosity REceramin/carbon/steelst Thread-Topic: [FlyRotary] Re: Ceramic Apex Seals....curiosity REceramin/carbon/steelst Thread-Index: AQHLzS7JNrZrK707LUiCV5MBe4jqdpQCx7Xu Date: Tue, 15 Feb 2011 16:58:09 +0000 Message-ID: <2D41F9BF3B5F9842B164AF93214F3D3035729C66@FCD-MAIL06.FCDATA.PRIVATE> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [166.139.76.11] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Heck, tearing down my engine seems to be a routine event as of late That was my understanding too....about being nicer to the housings. I was just wondering about what I don't know or what could be expanded on. Like Dave said, minding parameters is the proper course but I would like to= have as clear an understanding as possible for my own edification. ________________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = Ernest Christley [echristley@att.net] Sent: Tuesday, February 15, 2011 10:37 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Ceramic Apex Seals....curiosity REceramin/carbon/s= teelst Chris Barber wrote: > Since I am likely about to replace my apex seals, at least in my rear > rotor, I was surfing around the net looking at options regarding apex > seals, O-rings, gaskets etc. The reality is, I will probably use > Tracy's seals, however, while on Mazdatrix looking at stuff, I once > again noticed the ceramic apex seals available there and their $300.00 > price for EACH one, thus costing $1800.00 for a set. YIKES. I am pretty > certain we have all looked at these and wondered about them. Personally > I pretty much dismissed them as not enough of a balance for what ya > get. Then I realized that I am not really certain what that $1800 buys. > > The argument I've heard for the ceramic seals is that they are nicer to the= chrome surface of the rotor housing. My answer to that is at 100hrs/yr, how long do you seriously expect to run the= engine before a teardown? Ten years will be 1,000 hrs, and the cheap seals have proven to be more than adequate for tha= t. Do you really want to run for more than 10yrs without cracking the image open? -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.= html=