X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from bay0-omc2-s8.bay0.hotmail.com ([65.54.246.144] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1332137 for flyrotary@lancaironline.net; Tue, 01 Aug 2006 14:31:46 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.54.246.144; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.250.76]) by bay0-omc2-s8.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.1830); Tue, 1 Aug 2006 11:30:58 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 1 Aug 2006 11:30:58 -0700 Message-ID: Received: from 4.171.114.152 by BAY115-DAV4.phx.gbl with DAV; Tue, 01 Aug 2006 18:30:55 +0000 X-Originating-IP: [4.171.114.152] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: 20B back together Date: Tue, 1 Aug 2006 14:30:50 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01C6_01C6B577.16431AB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.20.0029.3000 Seal-Send-Time: Tue, 1 Aug 2006 14:30:50 -0400 X-OriginalArrivalTime: 01 Aug 2006 18:30:58.0191 (UTC) FILETIME=[A1DD01F0:01C6B598] Return-Path: lors01@msn.com This is a multi-part message in MIME format. ------=_NextPart_000_01C6_01C6B577.16431AB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable As you said, the Hurleys were the hot ticket back when my 20B was built. = During the past several years I have seen many of them fail (mostly in = turbo engines in cars) and done some informal tests on them (take seal = between thumb and forefingers and snap them fairly easily). I simply = lost confidence in them. To be fair, they will probably work fine in = normally aspirated engines where the rotor grooves are in good shape, = especially since you are using 3 mm seals which should be stronger. =20 The other factor is the 'company motto' for RWS which reads "We Fly what = we Build", so since we now make apex seals I was virtually obligated to = do it.=20 Tracy ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Wednesday, July 26, 2006 10:42 AM Subject: [FlyRotary] Re: 20B back together Tracy, Can you expound on the need to replace the Hurley seals. I have the = 3mm Hurley seals in my 20B, with about 10 hours of ground running. At = the time I was rebuilding my engine Hurley seals were the best seals to = use, or so I was told. So, what's changed? I also have the TES o-rings = installed throughout. =20 =20 Thanks, Mark S. =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Tracy Crook Sent: Wednesday, July 26, 2006 9:00 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: 20B back together =20 The tear down and apex seal replacement job on my 20B turned out to be = a 6 day ordeal instead of a quick 2 hour job but it's done and I can get = back to finishing the RV-8 again. Most of the problems were caused by = inexperience (haven't had to tear down a rotary in over 12 years) and = the fact that this was not a standard 20B but a mongrel built out of = mostly 13B parts. I went ahead and replaced the stock coolant O-rings = with TES parts while replacing the Hurley apex seals. =20 =20 Tracy (packing old GPS in plane for backup) ------=_NextPart_000_01C6_01C6B577.16431AB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

As you said, the Hurleys were the hot ticket back when my 20B was=20 built. During the past several years I have seen many of them = fail=20 (mostly in turbo engines in cars) and done some informal tests on them = (take=20 seal between thumb and forefingers and snap them fairly easily). I = simply=20 lost confidence in them. To be fair, they will probably work fine = in=20 normally aspirated engines where the rotor grooves are in good shape, = especially=20 since you are using 3 mm seals which should be stronger. =

The other factor is the 'company motto' for RWS which reads "We Fly = what we=20 Build", so since we now make apex seals I was virtually obligated = to do=20 it.

Tracy

----- Original Message -----

From: Mark R Steitle =

To: Rotary motors in = aircraft

Sent: Wednesday, July 26, 2006 = 10:42=20 AM

Subject: [FlyRotary] Re: 20B = back=20 together

Tracy,

Can you = expound on=20 the need to replace the Hurley seals. I have the 3mm Hurley = seals in my=20 20B, with about 10 hours of ground running. At the time I was = rebuilding=20 my engine Hurley seals were the best seals to use, or so I was = told. So,=20 what=92s changed? I also have the TES o-rings installed = throughout. =20

Thanks,

Mark=20 S.

From: Rotary=20 motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy = Crook
Sent: Wednesday, July 26, 2006 = 9:00=20 AM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 Re: 20B back together

The tear = down and=20 apex seal replacement job on my 20B turned out to be a 6 day = ordeal=20 instead of a quick 2 hour job but it's done and I can get back to = finishing the RV-8 again. Most of the problems were caused = by=20 inexperience (haven't had to tear down a rotary in over 12=20 years) and the fact that this was not a standard 20B but a = mongrel built=20 out of mostly 13B parts. I went ahead = and replaced the=20 stock coolant O-rings with TES parts while replacing=20 the Hurley apex seals.

Tracy = (packing=20 old GPS in plane for=20 backup)

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