X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imo-m26.mx.aol.com ([64.12.137.7] verified) by logan.com (CommuniGate Pro SMTP 5.0.5) with ESMTP id 904707 for flyrotary@lancaironline.net; Wed, 28 Dec 2005 23:28:49 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.7; envelope-from=WRJJRS@aol.com Received: from WRJJRS@aol.com by imo-m26.mx.aol.com (mail_out_v38_r6.3.) id q.263.336b916 (4446) for ; Wed, 28 Dec 2005 23:28:03 -0500 (EST) From: WRJJRS@aol.com Message-ID: <263.336b916.30e4bfd3@aol.com> Date: Wed, 28 Dec 2005 23:28:03 EST Subject: Re: [FlyRotary] Re: carbon seals? To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1135830483" X-Mailer: 9.0 SE for Windows sub 5022 X-Spam-Flag: NO -------------------------------1135830483 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/28/2005 7:02:19 PM Pacific Standard Time, atlasyts@bellsouth.net writes: On Dec 28, 2005, at 6:54 PM, _wrjjrs@aol.com_ (mailto:wrjjrs@aol.com) wrote: Monty, Carbon is old-speak, most are going for Tracys' ceramic seals. The take a while to break in, but seem to last very well. Rotor housing wear hasn't been a problem for anyone not using a 100,000 mile motor to start with. Ed Anderson ran into some trouble with ROTOR tip seal slot wear, check yours carefully. I defer to Tracy, Ed and Lynn as to the corner seals, nobody I know has really worn out a motor. (including racers in sedan classes!) Bill Jepson Bill, Tracy's seals are not ceramic. They are made from a super secret Unobtainium metal:) Buly To everybody on fly rotary, MEA CULPA. Incorrect listing for the ceramic seals! Tracy's seals are listed as a "Proprietary alloy" that is not a derivative of gray cast iron as most are. (Mazda's as well) I was thinking of ceramic seals. Then Tracy's seals and blurted that out. Lynn, My dad was a ceramic expert. The softest true ceramic is so hard that it can only be machined using diamond grinding processes, hence the "stupid" prices. (I agree that the actual ceramic seals are hideously expensive) Monty, I do still say that carbon seals are not a good Idea for an aircraft engine. Go with something more durable like Tracy's or the high priced ceramic. Fortunately for us Tracy's seals are getting good reports from the car guys using them at ridiculous RPM and pressure. They should last well in our engines. Tracy's seals are much cheaper as well so let's get some! Buly, I am planning to start an UNOBTAININUM mine real soon, wanna buy stock? Bill Jepson -------------------------------1135830483 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 12/28/2005 7:02:19 PM Pacific Standard Time,=20 atlasyts@bellsouth.net writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
On Dec 28, 2005, at 6:54 PM, wrjjrs@aol.com wrote:
Monty,
Carbon=20 is old-speak, most are going for Tracys' ceramic seals. The take a while= to=20 break in, but seem to last very well. Rotor housing wear hasn'= t=20 been a problem for anyone not using a 100,000 mile motor to start with.=20= Ed=20 Anderson ran into some trouble with ROTOR tip seal slot wear, check= =20 yours carefully. I defer to Tracy, Ed and Lynn as to the corner sea= ls,=20 nobody I know has really worn out a motor. (including racers in sedan=20 classes!)
Bill=20 Jepson  


Bill, Tracy's seals are not ceramic. They are made from a super secre= t=20 Unobtainium metal:)
Buly
To everybody on fly rotary, MEA CULPA. Incorrect listing for the cerami= c=20 seals!
Tracy's seals are listed as a "Proprietary alloy" that is not a derivat= ive=20 of gray cast iron as most are. (Mazda's as well) I was thinking of ceramic=20 seals. Then Tracy's seals and blurted that out.
Lynn, My dad was a ceramic expert. The softest true ceramic is so hard=20= that=20 it can only be machined using diamond grinding processes, hence the "stupid"= =20 prices. (I agree that the actual ceramic seals are hideously expensive)
 Monty, I do still say that carbon seals are not a good Idea for a= n=20 aircraft engine. Go with something more durable like Tracy's or the high pri= ced=20 ceramic. Fortunately for us Tracy's seals are getting good reports from the=20= car=20 guys using them at ridiculous RPM and pressure. They should last well in our= =20 engines. Tracy's seals are much cheaper as well so let's get some!
Buly, I am planning to start an UNOBTAININUM mine real soon, wanna= buy=20 stock?
Bill Jepson 
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