Return-Path: Received: from mail.mc.net ([209.172.128.4]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with SMTP id com for ; Mon, 2 Oct 2000 11:43:11 -0400 Received: (qmail 23477 invoked from network); 2 Oct 2000 15:50:17 -0000 Received: from chi-ras-2-209-112-94-94.mc.net (HELO mc.net) (209.112.94.94) by mail.mc.net with SMTP; 2 Oct 2000 15:50:17 -0000 Message-ID: <39D8AEE9.A3144E7F@mc.net> Date: Mon, 02 Oct 2000 10:51:06 -0500 From: jerry@mc.net To: lancair.list@olsusa.com Subject: Re: Preventing Spinner Backup Plate Stress Fractures References: X-Mailing-List: lancair.list@olsusa.com Reply-To: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Byron, I've been thinking of a solution for many moons now and so far I've come up with this: The spinner needs to be mounted in rubber on the back end so it can do it's micro-wobble thing. The front needs to be stabilized on center and then "nailed" on center. I'm not flying yet but it seems to me the front spinner bulkhead rubber is a good step toward stabilizing the spinner on center. The missing ingredient on the front is a "quasi connection" between the front part ahead of the front bulkhead and the spinner itself. Visualize a front bulkhead of glass with a center cone shaped "tit" about 1" long by 2" diameter. Then visualize the forward part spinner cavity filled with expansion foam through a small hole in the forward bulkhead. This would "nail" the front part of the spinner on center but still allow the spinner to be removeable when necessary. The backplate needs to be two parts: The center part which bolts up behind the prop hub The outer part which screws to the trailing edge of the spinner The two parts are then screwed together with a rubber gasket sandwiched which allows the inevitable wobble to have it's way. I think the rubber would then be sacrificed and not the expensive backplate. >From the for what it's worth department ... my dimes worth. Jerry Grimmonpre' LNC320 McHenry IL >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>