X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost01.isp.att.net ([207.115.11.51] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4173665 for flyrotary@lancaironline.net; Sun, 21 Mar 2010 13:06:20 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.51; envelope-from=keltro@att.net DKIM-Signature: v=1; q=dns/txt; d=att.net; s=dkim01; i=keltro@att.net; a=rsa-sha256; c=relaxed/relaxed; t=1269191179; h=Content-Type: MIME-Version:In-Reply-To:Message-Id:Date:Subject:To:From; bh=o9eFPm QcfKx2RcfNYrkhstKfpHBIXn8GsvCcXwgSjJc=; b=f/kf7NLVAiG8XpLkXR1J0VFnz T2IMlnSRfNwW3WK/lX86ADSrGQ+o+8jzmdwMK9RTtsBxlCFzsjodE8dsPLEAQ== Received: from fwebmail31.isp.att.net ([207.115.9.161]) by isp.att.net (frfwmhc01) with SMTP id <20100321170544H0100t2iqoe>; Sun, 21 Mar 2010 17:05:44 +0000 X-Originating-IP: [207.115.9.161] Received: from [208.114.33.249] by fwebmail31.isp.att.net; Sun, 21 Mar 2010 17:05:42 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Question on RD2-C Date: Sun, 21 Mar 2010 17:05:42 +0000 Message-Id: <032120101705.16665.4BA651E60009791D0000411922243322829B0A02D29B9B0EBF019D9B040A05@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Mar 2 2009) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_16665_1269191142_0" --NextPart_Webmail_9m3u9jl4l_16665_1269191142_0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Mark,=20 Aircraft Spruce or other suppliers should have them........... -- Kelly Troyer=20 "Dyke Delta"_13B ROTARY Engine=20 "RWS"_RD1C/EC2/EM2=20 "Mistral"_Backplate/Oil Manifold=20 -------------- Original message from Mark Steitle : ---= -----------=20 Al, Bolts were AN3-6A, but not of the close tolerance variety... not a bad idea= though. Does Van's sell those?=20=20 Mark S. On Sun, Mar 21, 2010 at 10:53 AM, Al Gietzen wrote: The rivets are aluminum.=20 I find this surprising, as well as disappointing. I checked the rivets on my RD2-C damper assembly and was able to confirm th= at they were in fact beginning to loosen as evidenced by the radial streaks= on the damper plate. I picked four rivets at random, approx. 90 degrees a= part, and grabbed the shop heads with vice grips and tried to spin them. A= ll four would spin with little effort, thus confirming that they were begin= ning to loosen. After a phone call to Tracy, we decided to replace the rin= g of rivets with AN3 bolts, which I've now done. One advantage to rivets is that they fill the holes to zero tolerance. The= bolts will be MUCH stronger, but I=E2=80=99m wondering about the potential= for some very small amount of =E2=80=98play=E2=80=99 to begin with, which = would not be a good thing. I don=E2=80=99t know much about steel rivets, b= ut maybe that=E2=80=99s the way to go.=20=20 Mark; what nominal length and grip length on the bolts? Are you using stand= ard AN bolts or are there =E2=80=98true=E2=80=99 diameter or =E2=80=98close= tolerance=E2=80=99 bolts available. Al Hum-m-m; I just decided I could change schedules in order to fly to the Jea= n, NV gathering next week. Now I=E2=80=99m wondering whether to fly anywher= e before changing out the rivets. I=E2=80=99m thinking that since I see no = movement between flange and plate after 180 hours, it should be good for at= least a few more hours. --NextPart_Webmail_9m3u9jl4l_16665_1269191142_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_16665_1269191142_1" --NextPart_Webmail_9m3u9jl4l_16665_1269191142_1 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Mark,

Aircraft Spruce or other suppliers should have them......= .....

--
Kelly Troyer
"Dyke Delta"_1= 3B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifol= d

-------------- Original message from Mark Steitle <msteit= le@gmail.com>: --------------

Al,

Bolts were AN3-6A, but not of the close tolerance variety... not a bad= idea though. Does Van's sell those?

Mark S.

On Sun, Mar 21, 2010 at 10:53 AM, Al Gietzen <ALVentures@cox.net= > wrote:

The rivets are aluminum.

I find this surprising, as well as disappoint= ing.

=

I checked the rivets on my R= D2-C damper assembly and was able to confirm that they were in fact beginni= ng to loosen as evidenced by the radial streaks on the damper plate. = I picked four rivets at random, approx. 90 degrees apart, and grabbed the s= hop heads with vice grips and tried to spin them. All four would spin= with little effort, thus confirming that they were beginning to loosen. &n= bsp;After a phone call to Tracy, we decided to replace the ri= ng of rivets with AN3 bolts, which I've now done.

One advantage to ri= vets is that they fill the holes to zero tolerance. The bolts will be= MUCH stronger, but I=E2=80=99m wondering about the potential for some very= small amount of =E2=80=98play=E2=80=99 to begin with, which would not be a= good thing. I don=E2=80=99t know much about steel rivets, but maybe = that=E2=80=99s the way to go.

= ;

Mark; what nominal = length and grip length on the bolts? Are you using standard AN bolts or are= there =E2=80=98true=E2=80=99 diameter or =E2=80=98close tolerance=E2=80=99= bolts available.

= ;

Al
= ;

Hum-m-m; I just dec= ided I could change schedules in order to fly to the Jean, NV gathering nex= t week. Now I=E2=80=99m wondering whether to fly anywhere before changing o= ut the rivets. I=E2=80=99m thinking that since I see no movement between fl= ange and plate after 180 hours, it should be good for at least a few more h= ours.

--NextPart_Webmail_9m3u9jl4l_16665_1269191142_1-- --NextPart_Webmail_9m3u9jl4l_16665_1269191142_0--