X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail02.syd.optusnet.com.au ([211.29.132.183] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTPS id 2958999 for flyrotary@lancaironline.net; Sun, 08 Jun 2008 18:01:08 -0400 Received-SPF: pass receiver=logan.com; client-ip=211.29.132.183; envelope-from=lendich@optusnet.com.au Received: from george (d58-104-215-70.dsl.nsw.optusnet.com.au [58.104.215.70]) by mail02.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id m58M0IuV012378 for ; Mon, 9 Jun 2008 08:00:24 +1000 Message-ID: <001e01c8c9b3$0d886270$6400a8c0@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Ceramic apex seals Date: Mon, 9 Jun 2008 08:00:17 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0019_01C8CA06.DB3CD270" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-Antivirus: avast! (VPS 0657-0, 12/12/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0019_01C8CA06.DB3CD270 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Paul, I guess one way ( other than visual) would be to put a magnet to it. George (down under) ----- Original Message -----=20 From: Paul Vermillion=20 To: Rotary motors in aircraft=20 Sent: Monday, June 09, 2008 1:42 AM Subject: [FlyRotary] Re: Ceramic apex seals Lynn- 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 "ceramic seals". 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 -------------------------------------------------------------------------= ----- Internal Virus Database is out-of-date. Checked by AVG.=20 Version: 7.5.524 / Virus Database: 269.24.1/1469 - Release Date: = 27/05/2008 1:25 PM ------=_NextPart_000_0019_01C8CA06.DB3CD270 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Paul,
I guess one way ( other than = visual) would be=20 to put a magnet to it.
George (down under)
----- Original Message -----
From:=20 Paul = Vermillion=20
Sent: Monday, June 09, 2008 = 1:42 AM
Subject: [FlyRotary] Re: = Ceramic apex=20 seals

Lynn=97

        &= nbsp;      =20 I have a 13B NA which has previously been converted to propane by = Rotary=20 International Enterprises (?) and has to be reconverted to = mogas/avgas. =20  It allegedly has 17 hours of runtime on it and also was claimed = to have=20 been rebuilt using =93ceramic seals=94.  When we do a tear down = on it for=20 inspection, at the risk of sounding totally na=EFve, how do we = ascertain that it=20 truly does have ceramic seals on it and would you recommend = that we=20 simply just go ahead and replace them with more traditional seals=20 regardless?  (Comments from not only you but also anyone else = would be=20 greatly appreciated.)

 

Paul=20 Vermillion

(partially=20 completed BD-4)

 

From: Rotary = motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Lynn = Hanover
Sent: Sunday, June 08, 2008 12:46 AM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Ceramic apex=20 seals

 

 

There=20 are one piece carbon / aluminum seals, not too expensive, great for = racing.=20 Good sealing

never=20 hurt the rotor housings. Can handle some boost. Very light and can do = monster=20 revs over 10,000 RPM. You have to be a memebr of the Mazda competition = program=20 and provide pictures of your race car and finish sheets from a number = of=20 events.

 

The=20 very best are ceramic one piece seals. Scary light. Strong enough for = high=20 boost. Not affected by engine over temps or detonation. Run with two = springs=20 for tracking at scalding high revs and still have less drag than stock = or=20 carbon seals. No downside until you try to buy them.=20

About=20 $330.00 each seal, (you need 6). This is a bolt on 6 HP just from = reduced=20 drag. No rotor housing wear. From Mazda comp. and after market = vendors. Carbon=20 as well.

 

Lynn=20 E. Hanover 

 

Newbie=20 Question---for the "normal"13B NA engine, how do the ceramic =  apex seals=20 compare with the other types of seals you all are using?  = (I've rarely=20 ever read anything about their use in this=20 forum.)

 

Paul=20 Vermillion

Internal Virus Database is out-of-date.
Checked by AVG. =
Version:=20 7.5.524 / Virus Database: 269.24.1/1469 - Release Date: 27/05/2008 = 1:25=20 PM
------=_NextPart_000_0019_01C8CA06.DB3CD270--