X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost01.isp.att.net ([204.127.217.101] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTP id 2913648 for flyrotary@lancaironline.net; Thu, 08 May 2008 11:36:59 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.101; envelope-from=keltro@att.net Received: from fwebmail33.isp.att.net ([204.127.221.133]) by isp.att.net (frfwmhc01) with SMTP id <20080508153622H01000ejmve>; Thu, 8 May 2008 15:36:22 +0000 X-Originating-IP: [204.127.221.133] Received: from [64.250.201.69] by fwebmail33.isp.att.net; Thu, 08 May 2008 15:36:21 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] flywheel nut Date: Thu, 08 May 2008 15:36:21 +0000 Message-Id: <050820081536.7495.48231DF5000282CB00001D4722243323629B0A02D29B9B0EBF019D9B040A05@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Mar 10 2008) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_7495_1210260981_0" --NextPart_Webmail_9m3u9jl4l_7495_1210260981_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Ernest, All rotarys I have seen had complete thread engagment of the flywheel/counterweight nut........The early 12A/13B rotarys used a thin washer behind the nut but all from at least 86 on do not use the washer.......If washer is used on newer 13B it could prevent complete thread engagement........I presume you are using the auto trans counterweight and flexplate flywheel..........FWIW -- Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold -------------- Original message from Ernest Christley : -------------- > I torqued down the flyweel nut last night to 300ft.lbs., but I notice > that about 2 threads of the nut are not engaged. It looks like the > flywheel taper is seated completely, but I've never known of a properly > assembled threaded structure having part of the nut sticking out. Do I > need to pull this apart and see what is amiss, or is all as it should be? > > BTW, still haven't determined if the engine-to-bellhousing bolts are > 1.25 or 1.00 pitch yet. I don't have a metric thread gauge. Another > good excuse to by more tools!! > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --NextPart_Webmail_9m3u9jl4l_7495_1210260981_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_7495_1210260981_1" --NextPart_Webmail_9m3u9jl4l_7495_1210260981_1 Content-Type: text/html Content-Transfer-Encoding: 8bit

Ernest,

All rotarys I have seen had complete thread engagment of the flywheel/counterweight

nut........The early 12A/13B rotarys used a thin washer behind the nut but all from at least

86 on do not use the washer.......If washer is used on newer 13B it could prevent complete

thread engagement........I presume you are using the auto trans counterweight and flexplate

flywheel..........FWIW

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

-------------- Original message from Ernest Christley <echristley@nc.rr.com>: --------------

> I torqued down the flyweel nut last night to 300ft.lbs., but I notice
> that about 2 threads of the nut are not engaged. It looks like the
> flywheel taper is seated completely, but I've never known of a properly
> assembled threaded structure having part of the nut sticking out. Do I
> need to pull this apart and see what is amiss, or is all as it should be?
>
> BTW, still haven't determined if the engine-to-bellhousing bolts are
> 1.25 or 1.00 pitch yet. I don't have a metric thread gauge. Another
> good excuse to by more tools!!
>
> --
> Homepage: http://www.flyrotary.com/
> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html

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