X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from imr-ma06.mx.aol.com ([64.12.78.142] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5067142 for flyrotary@lancaironline.net; Thu, 28 Jul 2011 21:59:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.78.142; envelope-from=Lehanover@aol.com Received: from mtaomg-mb04.r1000.mx.aol.com (mtaomg-mb04.r1000.mx.aol.com [172.29.41.75]) by imr-ma06.mx.aol.com (8.14.1/8.14.1) with ESMTP id p6T1wjXu007593 for ; Thu, 28 Jul 2011 21:58:45 -0400 Received: from core-moe001c.r1000.mail.aol.com (core-moe001.r1000.mail.aol.com [172.29.188.65]) by mtaomg-mb04.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 423EFE000088 for ; Thu, 28 Jul 2011 21:58:45 -0400 (EDT) From: Lehanover@aol.com Message-ID: <279d3.287ce687.3b636dd5@aol.com> Date: Thu, 28 Jul 2011 21:58:45 -0400 (EDT) Subject: Re: [FlyRotary] Re: Flex Plate Question To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_279d3.287ce687.3b636dd5_boundary" X-Mailer: AOL 9.6 sub 5004 X-AOL-IP: 173.88.24.45 X-Originating-IP: [173.88.24.45] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:327592192:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d294b4e3213d55109 --part1_279d3.287ce687.3b636dd5_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit 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 --part1_279d3.287ce687.3b636dd5_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

The flex plate is a stamping, done in low grade steel. The starter rin= g is=20 pressed over the flange, and measured for run out, then welded in a few pla= ces.=20 It is in no sense a precision piece. It only maters that the run out of the= ring=20 gear is within specs (whatever Mazda thinks is OK) and nothing more. The pl= ate=20 is flexible to the extent that it will bend readily to accommodate a poor f= it to=20 the torque converter, but is not designed to actually flex in=20 operation, as it will fatigue crack eventually.

Some run out would be expected, and is of no importance. Should the ru= n out=20 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 r= unout=20 of the flex plate and it measured +/- 0.006 in. or 0.012 in total wobble = - can=20 anyone tell me if this is too much or what maximum is acceptable? C= an=20 the flex plate be tweaked by prying on the ring gear to bend it closer to= =20 straight?

Dennis Haverlah

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