X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5067150 for flyrotary@lancaironline.net; Thu, 28 Jul 2011 22:56:11 -0400 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.122; envelope-from=clouduster@austin.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=Pm0sEXe2MdIPK/rOEC7hwDW84D/yDsPO3JtCzsVYOFU= c=1 sm=0 a=tRPlqXFLA8QA:10 a=e9Fp7UO/B8F9COq9AYcbcw==:17 a=3oc9M9_CAAAA:8 a=ayC55rCoAAAA:8 a=oJuKh1IXUNI9H1JSXMcA:9 a=v3QHRZ62_-6Vqr5RKJgA:7 a=wPNLvfGTeEIA:10 a=U8Ie8EnqySEA:10 a=Ia-xEzejAAAA:8 a=cmzKut7fLSknm8wgWdgA:9 a=LJfYwBOsqZ2F8KdPteIA:7 a=EzXvWhQp4_cA:10 a=e9Fp7UO/B8F9COq9AYcbcw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 66.68.41.170 Received: from [66.68.41.170] ([66.68.41.170:59732] helo=DWHPC) by hrndva-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id 06/EE-20593-921223E4; Fri, 29 Jul 2011 02:55:37 +0000 Message-ID: From: "Dennis Havarlah" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Flex Plate Question Date: Thu, 28 Jul 2011 21:55:36 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004E_01CC4D71.15346420" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_004E_01CC4D71.15346420 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks for the information Lynn. I visually inspected for cracks last = week but plan to use dye penetrate to check in the near future. =20 Dennis H. ----- Original Message -----=20 From: Lehanover@aol.com=20 To: Rotary motors in aircraft=20 Sent: Thursday, July 28, 2011 8:58 PM Subject: [FlyRotary] Re: Flex Plate Question The flex plate is a stamping, done in low grade steel. The starter = ring is pressed over the flange, and measured for run out, then welded = in a few places. It is in no sense a precision piece. It only maters = that the run out of the ring gear is within specs (whatever Mazda thinks = is OK) and nothing more. The plate is flexible to the extent that it = will bend readily to accommodate a poor fit to the torque converter, but = is not designed to actually flex in operation, as it will fatigue crack = eventually. Some run out would be expected, and is of no importance. Should the = run out increase between checks then inspection for cracks is in order. A check for cracks now would provide a base line for future = inspections. Lynn E. Hanover In a message dated 7/27/2011 11:04:04 P.M. Paraguay Standard Time, = clouduster@austin.rr.com writes: I have about 330 hours of run time on my RX-8 powered RV-7A using = the RX-7 flex plate per Tracy. I measured the runout of the flex plate = and it measured +/- 0.006 in. or 0.012 in total wobble - can anyone tell = me if this is too much or what maximum is acceptable? Can the flex = plate be tweaked by prying on the ring gear to bend it closer to = straight? Dennis Haverlah ------=_NextPart_000_004E_01CC4D71.15346420 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Thanks for the information Lynn.  I visually = inspected=20 for cracks last week but plan to use dye penetrate to check in the near=20 future.
 
Dennis H.
----- Original Message -----
From:=20 Lehanover@aol.com
Sent: Thursday, July 28, 2011 = 8:58=20 PM
Subject: [FlyRotary] Re: Flex = Plate=20 Question

The flex plate is a stamping, done in low grade steel. The = starter ring=20 is pressed over the flange, and measured for run out, then welded in a = few=20 places. It is in no sense a precision piece. It only maters that the = run out=20 of the ring gear is within specs (whatever Mazda thinks is OK) and = nothing=20 more. The plate is flexible to the extent that it will bend readily to = accommodate a poor fit to the torque converter, but is not=20 designed to actually flex in operation, as it will fatigue crack=20 eventually.
 
Some run out would be expected, and is of no importance. Should = the run=20 out increase between checks then inspection for cracks is in = order.
 
A check for cracks now would provide a base line for future=20 inspections.
 
Lynn E. Hanover
 
 
 
In a message dated 7/27/2011 11:04:04 P.M. Paraguay Standard = Time,=20 clouduster@austin.rr.com writes:
I have about 330 hours of run time = on my RX-8=20 powered RV-7A using the RX-7 flex plate per Tracy.  I measured = the=20 runout of the flex plate and it measured +/- 0.006 in. or 0.012 in = total=20 wobble - can anyone tell me if this is too much or what maximum is=20 acceptable?  Can the flex plate be tweaked by prying on the = ring gear=20 to bend it closer to straight?
 
Dennis Haverlah
=
 
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