X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao105.cox.net ([68.230.241.41] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4179025 for flyrotary@lancaironline.net; Thu, 25 Mar 2010 18:53:02 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.41; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao105.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100325225227.UXNZ23291.fed1rmmtao105.cox.net@fed1rmimpo01.cox.net> for ; Thu, 25 Mar 2010 18:52:27 -0400 Received: from BigAl ([72.192.128.205]) by fed1rmimpo01.cox.net with bizsmtp id xasS1d00H4S1t5C03asS0g; Thu, 25 Mar 2010 18:52:26 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=9X1BeRvGVdXikaVgI7mHUqmIOlosh/BCISq12UegNM8= c=1 sm=1 a=1bG-CczpJ3MA:10 a=Vegc0WxVmH5BHtpNDyThtA==:17 a=NW4_qYSpR7Xu7gvvkHAA:9 a=OzB-0yeUsITsC0_JfEgA:7 a=Fo-TyF77BooyX5Rm6siM7zkI_rIA:4 a=CjuIK1q_8ugA:10 a=DLWMlUhjhMJrQHdOOgEA:9 a=Sc5q73_00JmfHhLW8twA:7 a=hgJtF3R4vi37A8IpVHhEavobh30A:4 a=Vegc0WxVmH5BHtpNDyThtA==:117 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Rotating Disc Vibration nodes was [FlyRotary] Re: Adaptor plate rivets Date: Thu, 25 Mar 2010 15:52:15 -0800 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001B_01CACC33.2403FD00" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6856 In-Reply-To: Importance: Normal Thread-Index: AcrMakUEqX/29b9dQUO3tNBrhKsMlwACnIAg X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_001B_01CACC33.2403FD00 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 One never knows for sure; but I think not likely that this applies. = This is for discs constrained at the center, as on a spindle, where the outer = edge is free. =20 =20 Clarifying - that comment was directed toward that modeling not being applicable; but that doesn't mean that a vibration induced axial loading = is not a possibility. I was thinking in terms of the plate/disk in which = the rivets are located, but that is attached to the starter ring gear disc, which is flexible as well; and there could be some "ringing" going on. = The rivets are certainly weak in the axial direction. Using bolts that are = very strong both axially and in shear, and provide strong clamping force = between the parts does seem like a better solution. =20 So when we make that stronger - do we drive the issue to some other = point? OK, I won't even go there. =20 Al ------=_NextPart_000_001B_01CACC33.2403FD00 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 

One never knows for sure; but I think not likely that this applies.  = This is for discs constrained at the center, as on a spindle, where the outer = edge is free. 

 

Clarifying = – that comment was directed toward that modeling not being applicable; but = that doesn’t mean that a vibration induced axial loading is not a = possibility. I was thinking in terms of the plate/disk in which the rivets are = located, but that is attached to the starter ring gear disc, which is flexible as = well; and there could be some “ringing” going on. The rivets are = certainly weak in the axial direction. Using bolts that are very strong both = axially and in shear, and provide strong clamping force between the parts does seem = like a better solution.

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So when we = make that stronger – do we drive the issue to some other point?  OK, I = won’t even go there.

 <= /font>

Al

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