X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao12.cox.net ([68.230.241.27] verified) by logan.com (CommuniGate Pro SMTP 5.1c.3) with ESMTP id 1364532 for flyrotary@lancaironline.net; Tue, 05 Sep 2006 12:19:51 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.27; envelope-from=dale.r@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao12.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060905161908.SKSE20060.fed1rmmtao12.cox.net@fed1rmimpo02.cox.net> for ; Tue, 5 Sep 2006 12:19:08 -0400 Received: from [192.168.1.100] ([68.2.134.48]) by fed1rmimpo02.cox.net with bizsmtp id JgK91V00P12ovmC0000000 Tue, 05 Sep 2006 12:19:09 -0400 Message-ID: <44FDA373.8010807@cox.net> Date: Tue, 05 Sep 2006 09:18:59 -0700 From: Dale Rogers Reply-To: dale.r@cox.net User-Agent: Thunderbird 1.5.0.5 (Windows/20060719) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Engine alignment References: In-Reply-To: Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Thanks Ed,

   If all it was *ever* going to be was just a test stand, I'd agree
about the precision.  The test stand is as accurate a model of the
COZY firewall, dimensionally, as I can make it (same template).  If
this works out well, then I'll be duplicating the mount for the real
thing - except I'll send that one out to be welded by a certified
welder.  If it doesn't, then I hope CCI gets caught up on the
backlog before next fall (2007).

BTW, most of my ideas for implementing "plugs-up" came from
the photos of your installation.

Dale R.

 Boy, seems like a lot of work either way.  I am not certain you need that kind of accuracy (particularly for a test stand).  I think I would determine the center of the e shaft (pretty easy to do with the flywheel nut on) and perhaps a bit harder on the pulley end (depending on whether a stock or after market pulley) and then hang the engine and use a carpenter's square (or something similar) attached to your firewall (or front end) wherever you want the e shaft center line to be.  Then align the engine until the flywheel nut center line and pulley center line with your reference (T square point). 
 
Ed
 
 
----- Original Message -----
Sent: Tuesday, September 05, 2006 10:09 AM
Subject: [FlyRotary] Engine alignment

Hi All,

   Okay, I admit I'm taking the easy way out.  I haven't done an
exhaustive search of the archives.  Is there an easy way to
ascertain the eccentric shaft centerline, for purposes of designing
an engine mount?  I've decided I want to try a plugs-up mount for
my test stand.  Some things might be easier to fit in, using that
orientation.

   So far, only two strategies have come to mind: take the eccentric
shaft out, and replace it with two apertures; or machine a pointed
mandrel which can be bolted to the pulley flange.

Dale R.
COZY MkIV #1254


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