X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from eastrmmtao104.cox.net ([68.230.240.46] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTP id 2958673 for flyrotary@lancaironline.net; Sun, 08 Jun 2008 11:43:30 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.240.46; envelope-from=paulo264@cox.net Received: from eastrmimpo02.cox.net ([68.1.16.120]) by eastrmmtao104.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080608154248.WBGG7964.eastrmmtao104.cox.net@eastrmimpo02.cox.net> for ; Sun, 8 Jun 2008 11:42:48 -0400 Received: from paul400gb ([72.205.223.101]) by eastrmimpo02.cox.net with bizsmtp id bTip1Z0082BsoJG02Tip6k; Sun, 08 Jun 2008 11:42:49 -0400 From: "Paul Vermillion" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Ceramic apex seals Date: Sun, 8 Jun 2008 10:42:50 -0500 Message-ID: <000501c8c97e$4ec56240$ec5026c0$@net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01C8C954.65EF5A40" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcjJKwhL4j1wsSpTSVCU3mWzZhEh0wAUTXfg Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0006_01C8C954.65EF5A40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Lynn=97 I have a 13B NA which has previously been converted to propane by Rotary International Enterprises (?) and has to be = reconverted to mogas/avgas. It allegedly has 17 hours of runtime on it and also was claimed to have been rebuilt using =93ceramic seals=94. When we do a = tear down on it for inspection, at the risk of sounding totally na=EFve, how do we ascertain that it truly does have ceramic seals on it and would you recommend that we simply just go ahead and replace them with more traditional seals regardless? (Comments from not only you but also = anyone else would be greatly appreciated.) =20 Paul Vermillion (partially completed BD-4) =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Lynn Hanover Sent: Sunday, June 08, 2008 12:46 AM To: Rotary motors in aircraft Subject: [FlyRotary] Ceramic apex seals =20 =20 There are one piece carbon / aluminum seals, not too expensive, great = for racing. Good sealing never hurt the rotor housings. Can handle some boost. Very light and can = do monster revs over 10,000 RPM. You have to be a memebr of the Mazda competition program and provide pictures of your race car and finish = sheets from a number of events. =20 The very best are ceramic one piece seals. Scary light. Strong enough = for high boost. Not affected by engine over temps or detonation. Run with = two springs for tracking at scalding high revs and still have less drag than stock or carbon seals. No downside until you try to buy them.=20 About $330.00 each seal, (you need 6). This is a bolt on 6 HP just from reduced drag. No rotor housing wear. From Mazda comp. and after market vendors. Carbon as well. =20 Lynn E. Hanover=20 =20 Newbie Question---for the "normal"13B NA engine, how do the ceramic = apex seals compare with the other types of seals you all are using? (I've = rarely ever read anything about their use in this forum.) =20 Paul Vermillion ------=_NextPart_000_0006_01C8C954.65EF5A40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Lynn—

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 I have a = 13B NA which has previously been converted to propane by Rotary International Enterprises (?) and has to = be reconverted to mogas/avgas.=A0 =A0It allegedly has 17 hours of runtime = on it and also was claimed to have been rebuilt using “ceramic = seals”.=A0 When we do a tear down on it for inspection, at the risk of sounding totally = na=EFve, how do we ascertain that it truly does have ceramic seals on it and = would you recommend that we simply just go ahead and replace them with more traditional seals regardless?=A0 (Comments from not only you but also = anyone else would be greatly appreciated.)

Paul Vermillion

(partially completed BD-4)

From:= Rotary = motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Lynn = Hanover
Sent: Sunday, June 08, 2008 12:46 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Ceramic apex seals

There are one piece carbon / aluminum seals, not too = expensive, great for racing. Good sealing

never hurt the rotor housings. Can handle some boost. = Very light and can do monster revs over 10,000 RPM. You have to be a memebr of the = Mazda competition program and provide pictures of your race car and finish = sheets from a number of events.

The very best are ceramic one piece seals. Scary light. = Strong enough for high boost. Not affected by engine over temps or detonation. = Run with two springs for tracking at scalding high revs and still have less = drag than stock or carbon seals. No downside until you try to buy them. =

About $330.00 each seal, (you need 6). This is a bolt on = 6 HP just from reduced drag. No rotor housing wear. From Mazda comp. and = after market vendors. Carbon as well.

Lynn E. Hanover

Newbie Question---for the "normal"13B NA = engine, how do the ceramic apex seals compare with the other types of seals = you all are using? (I've rarely ever read anything about their use = in this forum.)

Paul Vermillion

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