X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [65.54.250.87] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 5.0.5) with ESMTP id 905235 for flyrotary@lancaironline.net; Thu, 29 Dec 2005 11:44:17 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.250.87; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 29 Dec 2005 08:43:32 -0800 Message-ID: Received: from 4.174.7.80 by BAY115-DAV15.phx.gbl with DAV; Thu, 29 Dec 2005 16:43:31 +0000 X-Originating-IP: [4.174.7.80] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Unobtainium seals? Date: Thu, 29 Dec 2005 11:43:28 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00C1_01C60C6D.15D33690" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Thu, 29 Dec 2005 11:43:28 -0500 X-OriginalArrivalTime: 29 Dec 2005 16:43:32.0123 (UTC) FILETIME=[00E4D6B0:01C60C97] This is a multi-part message in MIME format. ------=_NextPart_000_00C1_01C60C6D.15D33690 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =20 On Dec 28, 2005, at 6:54 PM, 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 =20 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.=20 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=20 True, the seals are made of unobtainium : ) But it gets worse. Will = soon introduce nitrided unobtainium seals. This is in response to the = drag racing maniacs running 30+ pounds of boost with occasional = detonation. The seals still don't break but they can be bent downward = in the middle when at high temperature and detonation slams them down, = bottoming them out on the spring seats. The nitrided seals retain their = strength at higher temps. =20 Tracy ------=_NextPart_000_00C1_01C60C6D.15D33690 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

On Dec 28, 2005, at 6:54 PM, wrjjrs@aol.com wrote:

Monty,

Carbon is = old-speak, most=20 are going for Tracys' ceramic seals. The take a while to = break in,=20 but seem to last very well. Rotor housing wear hasn't been a = problem=20 for anyone not using a 100,000 mile motor to start with. Ed = Anderson ran=20 into some trouble with ROTOR tip seal slot wear, check yours=20 carefully. I defer to Tracy, Ed and Lynn as to the corner = seals,=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 = secret=20 Unobtainium metal:)

Buly

To everybody on fly rotary, MEA CULPA. Incorrect listing for the = ceramic=20 seals!

Tracy's seals are listed as a "Proprietary alloy" that is not a=20 derivative of gray cast iron as most are. (Mazda's as well) I was = thinking of=20 ceramic 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 it can only be machined using diamond grinding processes, hence = the=20 "stupid" prices. (I agree that the actual ceramic seals are hideously=20 expensive)

Monty, I do still say that carbon seals are not a good Idea = for an=20 aircraft engine. Go with something more durable like Tracy's or the = high=20 priced ceramic. Fortunately for us Tracy's seals are getting good = reports from=20 the car guys using them at ridiculous RPM and pressure. They should = last well=20 in our engines. Tracy's seals are much cheaper as well so let's get=20 some!

Buly, I am planning to start an UNOBTAININUM mine real soon, = wanna=20 buy stock?

Bill Jepson

True, the seals are made of unobtainium : ) But it gets=20 worse. Will soon introduce nitrided unobtainium seals. = This is in=20 response to the drag racing maniacs running 30+ pounds of boost with=20 occasional detonation. The seals still don=92t break but they = can be bent=20 downward in the middle when at high temperature and detonation slams = them=20 down, bottoming them out on the spring seats. The nitrided = seals=20 retain their strength at higher temps.

Tracy

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