X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [24.25.9.100] (HELO ms-smtp-01-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 912523 for flyrotary@lancaironline.net; Sat, 23 Apr 2005 17:25:41 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-185-127.carolina.res.rr.com [24.74.185.127]) by ms-smtp-01-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id j3NLOnLw021882 for ; Sat, 23 Apr 2005 17:24:50 -0400 (EDT) Message-ID: <001401c5484a$e6b97220$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" Subject: WARNING V Grooves Date: Sat, 23 Apr 2005 17:24:58 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C54829.5F75C5A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C54829.5F75C5A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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. 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) 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. FWIW Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com ------=_NextPart_000_0011_01C54829.5F75C5A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I don't how I missed it before, but I = was reading=20 over the helpful instruction set that Tracy sends out with the Overhaul=20 Kit.  There is only ONE thing that they suggest checking on your = rotary=20 engine.
 
Quote:  " Check the apex seal = groove=20 carefully.  The stock seals tend to wear a "V" shape at the opening = (mouth)=20 of the groove (rotor).  If the grooves have been "V'ed" more than = 0.010"=20 clearance, (a groove opening width of more than 0.125") your rotor MUST be replaced or machined to = accept 3mm=20 apex seals.  The overall seal to rotor clearance should be 0.002 to = 0.006".           =     =20  I added the red and bold to the "must" in the statement=20 (Ed)
 
So I think its quite clear that Bruce T = (whom I=20 assume provided the input on the instructions) feels that "V" apex = grooves could=20 lead to BAD things.  Now my V was outside Mazda spec but within the = limits=20 of above - however, if all the factors stack up against you at the same = time,=20 perhaps bad things could happen before you reach the above = limit.
 
FWIW
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary=20 Powered
Matthews, NC
eanderson@carolina.rr.com
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