X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail03.syd.optusnet.com.au ([211.29.132.184] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTPS id 912687 for flyrotary@lancaironline.net; Sat, 23 Apr 2005 20:45:39 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.184; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-165-97.dsl.nsw.optusnet.com.au [211.31.165.97]) by mail03.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j3O0imO2025389 for ; Sun, 24 Apr 2005 10:44:49 +1000 Message-ID: <006701c54867$5e173de0$205c1fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: WARNING V Grooves Date: Sun, 24 Apr 2005 10:48:44 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0064_01C548BB.2F9A1B00" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0064_01C548BB.2F9A1B00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable David, We are thinking along the same lines and I think Lynn suggested = something similar, my only concern is that a hard/harder insert MIGHT = have an adverse on the actual apex seal. Then again Tracy's seals might withstand this. It's a hard one to figure-out without trails on materials etc. My feelings are that it takes a long tine for the grooves to 'V' anyway, = this plus the cost involved, might not make it worth while. A good thought just the same! George ( down under) Hi to all, has anyone ever considered ball-milling out the apex seal = grooves and pressing in a round tough steel insert and then milling the = seal slot in the steel insert. This would then be' horse shoe' cross = section, so to speak. The corner button seals could also fit into the = ends. Maybe a new rotor would be cheaper, but this may have better = reliability and longer life. FWIW, Dave Mc On 24/04/2005, at 5:24 AM, Ed Anderson wrote: I don't how I missed it before, but I was reading over the helpful = instruction set that Tracy sends out with the Overhaul Kit. There is = only ONE thing that they suggest checking on your rotary engine. =20 Quote: " Check the apex seal groove carefully. The stock seals = tend to wear a "V" shape at the opening (mouth) of the groove (rotor). = If the grooves have been "V'ed" more than 0.010" clearance, (a groove = opening width of more than 0.125") your rotor MUST be replaced or = machined to accept 3mm apex seals. The overall seal to rotor clearance = should be 0.002 to 0.006". I added the red and bold to = the "must" in the statement (Ed) =20 So I think its quite clear that Bruce T (whom I assume provided the = input on the instructions) feels that "V" apex grooves could lead to BAD = things. Now my V was outside Mazda spec but within the limits of above = - however, if all the factors stack up against you at the same time, = perhaps bad things could happen before you reach the above limit. =20 FWIW =20 Ed =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ------=_NextPart_000_0064_01C548BB.2F9A1B00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

David,

We are thinking along the same lines = and I think=20 Lynn suggested something similar, my only concern is that a hard/harder = insert=20 MIGHT have an adverse on the actual apex seal.

Then again Tracy's seals might = withstand=20 this.

It's a hard one to figure-out without = trails on=20 materials etc.

My feelings are that it takes a long = tine for the=20 grooves to 'V' anyway, this plus the cost involved, might = not make=20 it worth while.

A good thought just the = same!

George ( down under)

Hi=20 to all, has anyone ever considered ball-milling out the apex seal = grooves and=20 pressing in a round tough steel insert and then milling the seal slot = in the=20 steel insert. This would then be' horse shoe' cross section, so to = speak. The=20 corner button seals could also fit into the ends. Maybe a new rotor = would be=20 cheaper, but this may have better reliability and longer life. FWIW, = Dave=20 Mc
On 24/04/2005, at 5:24 AM, Ed Anderson wrote:

I don't how I missed = it=20 before, but I was reading over the helpful instruction set that = Tracy sends=20 out with the Overhaul Kit. There is only ONE thing that they = suggest=20 checking on your rotary = engine.

Quote: =20 " Check the apex seal groove carefully. The stock seals tend = to wear a=20 "V" shape at the opening (mouth) of the groove (rotor). If the = grooves=20 have been "V'ed" more than 0.010" clearance, (a groove opening width = of more=20 than 0.125") your rotor MUST=20 be replaced or machined to accept 3mm apex seals. The overall = seal to=20 rotor clearance should be 0.002 to=20 = 0.006". = =20 I added the red and bold to the "must" in the statement = (Ed)

So=20 I think its quite clear that Bruce T (whom I assume provided the = input on=20 the instructions) feels that "V" apex grooves could lead to BAD=20 things. Now my V was outside Mazda spec but within the limits = of above=20 - however, if all the factors stack up against you at the same time, = perhaps=20 bad things could happen before you reach the above = limit.

FWIW

<= ?param = Arial>Ed

Ed=20 Anderson
Rv-6A=20 N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.com

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