X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qw-out-2122.google.com ([74.125.92.26] verified) by logan.com (CommuniGate Pro SMTP 5.3.4) with ESMTP id 4179563 for flyrotary@lancaironline.net; Fri, 26 Mar 2010 08:30:26 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.125.92.26; envelope-from=rwstracy@gmail.com Received: by qw-out-2122.google.com with SMTP id 3so2253686qwe.25 for ; Fri, 26 Mar 2010 05:29:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:received:message-id:subject :from:to:content-type; bh=eV/G1vW22IKu7qF/lQ+a3mmO2ld+0C7vPzkweLIiBz0=; b=XEwNOzosr7XVnXRd8/6fl07NGn3PTq02sy93HQ15vuGjt9LHGsCRkRBkW+Qm0428VG UfMNbzSBXbqvNZp8R3ZxFB8FFpd5yTt3DvvaD7a5ij3kZUuDHYUoDAZiEBl37qnEzkek s0jtIDwCNF63VgM6AbJcudc5AHcDjs6v898Gk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=MFs3vV1BzPSnJWwz4OC1feMznzJe3/UrijpCWNOq5/oVYQs41qhcgBqBv8VQHnOGmG jffY2srimRxCUUHArRy1SKpN13NRlSm/DmaxeCI825WnWpcFvJ07j8b+bhvCgvHKsej+ YneZ+AfZdeGinNOEPM6cOsPSgUcsgsBLxDFXA= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.60.211 with HTTP; Fri, 26 Mar 2010 05:29:49 -0700 (PDT) In-Reply-To: References: Date: Fri, 26 Mar 2010 08:29:49 -0400 X-Google-Sender-Auth: d8f923179158610f Received: by 10.224.35.3 with SMTP id n3mr295023qad.169.1269606589720; Fri, 26 Mar 2010 05:29:49 -0700 (PDT) Message-ID: <1b4b137c1003260529h303dfbb8tae58978d9cf2b84d@mail.gmail.com> Subject: Re: [FlyRotary] Re: Adaptor plate rivets From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=00c09f9c9c8ac8e8c40482b351cb --00c09f9c9c8ac8e8c40482b351cb Content-Type: text/plain; charset=ISO-8859-1 *"I am wondering about some sort of change to the later models of the gear drive. Tracy?"* The damper has always been assembled with the same rivets and procedure from day 1. I'm still studying this and will report any conclusions. I inspected the damper on my 20B and it looked fine but only has 24 hours on it. The one on my Renesis is the same one I've used for 1200+ hours on various 13Bs and it is still OK. Preliminary thoughts are that I may change from -6A rivets to -6AD. The As were chosen for the same reason that steel rivets were not acceptable. That might have been over reaction. Tracy On Fri, Mar 26, 2010 at 4:16 AM, Todd Bartrim wrote: > > > Early drives like Tracy, Ed, Bill Eslick(? havent heard), Todd Bartrim > (havent heard), Chuck Dunlap (havent heard), Tommy James (havent heard) and > I (so far) don't seem to have a problem while you and Mark who > have slightly later versions are having loosening. (Have we heard from John > Slade or Steve Brooks and I missed it?) Any other high-time re-drives that > I left out?) - What about Tom Parks? (turbo 20B with Ross Drive). It's > possible that power is the main issue (average torque), but it seems to me > that peak torque and torque variation amplitude are what are going to matter > most. You and Mark are going to have lower peak torque than those of us > with turbo engines, and with 20B's you are are going to have lower torque > amplitude than even those with n.a. 13B's. Only your average torque is > higher. Seems strange... that is why I am wondering about some sort of > change to the later mod > els of the gear drive. Tracy? > -- > David Leonard > > Hi Dave; > When I disassembled my plate to install the PM generator rotor cup, I > did notice a couple of minor smoke trails from a few of the rivets, However > when I drilled them out for disassembly, none of them spun with the drill > bit, indicating that they were still tight. Since this is something that > I've modified from the original design, I'll certainly pay close attention > to it now. > Todd > > > --00c09f9c9c8ac8e8c40482b351cb Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable "I am wondering about some sort of change to the later models of th= e gear drive.=A0 Tracy?"

The damper has always been assembl= ed with the same rivets and procedure from day 1.=A0 I'm still studying= this and will report any conclusions.=A0 I inspected the damper on my 20B = and it looked fine but only has 24 hours on it.=A0=A0 The one on my Renesis= is the same one I've used for 1200+ hours on various 13Bs and it is st= ill OK.

Preliminary thoughts are that I may change from -6A rivets to -6AD.=A0 = The As were chosen for the same reason that steel rivets were not acceptabl= e.=A0 That might have been over reaction.

Tracy

On Fri, Mar 26, 2010 at 4:16 AM, Todd Bartrim <bartrim@gmail.com> wrote:
=20 =20


Early drives like Tracy, Ed, Bill Eslick(? havent heard), Todd Bartrim (hav= ent heard), Chuck Dunlap (havent heard), Tommy James (havent heard)=A0and I= (so far) don't seem to have a problem while you and Mark who have=A0sl= ightly=A0later versions are having loosening.=A0 (Have we heard from John S= lade=A0or Steve Brooks and=A0I missed it?)=A0 Any other high-time re-drives= that I left out?)=A0 - What about Tom Parks? (turbo 20B with Ross Drive). =A0 It's possible that power is the main issue (average torque), but it see= ms to me that peak torque and torque variation amplitude are what are going= to matter most.=A0 You and Mark are going to have lower peak torque than t= hose of us with turbo engines, and with 20B's you are are going to have= lower torque amplitude than even those with n.a. 13B's.=A0 Only your a= verage torque is higher.=A0 Seems strange... that is why I am wondering abo= ut some sort of change to the later mod
els of the gear drive.=A0 Tracy?
--
David Leonard

Hi Dave;
=A0=A0=A0 When I disassembled my plate to install t= he PM generator rotor cup, I did notice a couple of minor smoke trails from= a few of the rivets, However when I drilled them out for disassembly, none= of them spun with the drill bit, indicating that they were still tight. Si= nce this is something that I've modified from the original design, I= 9;ll certainly pay close attention to it now.
Todd



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