X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=L4JfeKb8 c=1 sm=1 tr=0 a=bITFefrx8MEES/AdMiujTg==:117 a=x7bEGLp0ZPQA:10 a=oSMvVwY2MYMA:10 a=smKx5t2vBNcA:10 a=o2QoyYduAAAA:8 a=Ia-xEzejAAAA:8 a=DRya93z_5-ZMfezBjdIA:9 a=QEXdDO2ut3YA:10 a=2WlTt-ytcv8FcD7N0DUA:9 a=eN8hWYLJM-vEt1Zs:21 a=S50rnUa8yRbNnh2hyxzf:22 a=Urk15JJjZg1Xo0ryW_k8:22 From: "David Leonard wdleonard@gmail.com" Received: from mail-qt1-f180.google.com ([209.85.160.180] verified) by logan.com (CommuniGate Pro SMTP 6.2.8) with ESMTPS id 11815640 for flyrotary@lancaironline.net; Sun, 28 Oct 2018 13:47:51 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.160.180; envelope-from=wdleonard@gmail.com Received: by mail-qt1-f180.google.com with SMTP id z2-v6so6774969qts.1 for ; Sun, 28 Oct 2018 10:47:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=f2TxaQqe67IO9jxzm5vjOKbc65DDtvzJnV+ihFq8ndo=; b=vgol3pq/Run96JCYlSfaB2XPyU9pongfGfev+kjSIk1otV2CicIEsdiorPRl9k5QpP xNOpWBvwXMN7bqo5+z/ZG/MCkdv2AIswt+pCAG0dwEwLiHkX4h22Ir6rCHrArGM6u+II 3I4VMBOSjJ8TMB2Um5Ti0tSpilzk1k0PWxmZj4Qy+PHB1gldeo5AerztGroThFNobkIa uaeVpm9NhPp0nS7/pmJL3/hoZE4nqXvBc/+/duhu+E76rNuQkoNof7bFd7S+PIv2ZCKj 69ANLcw3CXKypP1m6G/PpGDTmqENuBzErWem60VCMwghlEsCAHJYWPiNpLcsU4JD0ZhM loFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=f2TxaQqe67IO9jxzm5vjOKbc65DDtvzJnV+ihFq8ndo=; b=Vzqt6e5MFEqCx3mZnYAFfjZHilYMOU64pIOQT1priIlY0jgvOfXVwaZfsTGXj1Fv38 2TCdjH9mYCcJGNQ+zSihx5OnYx/8e6GPMcm9tNF/4Y3Kyzr6AcC1wjOtWb1MfhEtVi8s BWgilBL35zQ60fExdEHJcsnl3fXukGG2YdCqM3T1BHT+l8N2yPKNa/NcqaSb535F4dHc LUVrGuf3nXo1aXetJdRmiSah9MeR62RqzyvNwYlQeYPh6Nhe7fdCkTcTHBPJNA4n70ke NWQh3ZWA+H4EhRp6tjRix/MWn6Iput6FL/W1w1YzprPwahEf0K+D6jq4HgpQIPcOyRxh Myug== X-Gm-Message-State: AGRZ1gLcpEfuH1TJh/W04rNk6aehhaLcTE2IXUsSvnnbUsUyDtWZLx9n SKhbc8GEvcdizhJB0Ox8wt8sY3FhQSaP55amYmKAag== X-Google-Smtp-Source: AJdET5fOvVNAbUVaZrKlkwHu3gnQfKBbvC0F5iALNgKuHPpWRwQ3HRh5JbXS2gIC+piNAh7qNA5QkpfqpZljwLBUYaA= X-Received: by 2002:ac8:1b0f:: with SMTP id y15-v6mr1461346qtj.374.1540748853868; Sun, 28 Oct 2018 10:47:33 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Sun, 28 Oct 2018 10:47:24 -0700 Message-ID: Subject: Re: [FlyRotary] Flexplate location / failure To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="0000000000001f7ef605794d8c70" --0000000000001f7ef605794d8c70 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi Joe, Yes, my flex plate not only developed cracks but basically disintegrated. Keep in mind that I was running about 300hp at rookie school for Reno. None the less, the flex plate was never designed to transmit the output of engine, just allow the starter to turn it over. The lightening holes in it alow flexing that initiated the cracks, then the whole thing shattered. Surprisingly, in my case the pieces happend to jam together in such a way that it still functioned until I happend to find it on inspection several flight hours later. All the details of my fix are in the archives somewhere, but basically I replaced the flex plate with an off the shelf lightweight flywheel that I addapted to accept tracys damper plate. I took it to a machine shop to have the mounting holes correctly placed. I also had it balanced, but I probably could have skipped that step. I also had to machine a recess into Tracys mounting plate to allow the starter to reach the teeth on the flywheel. Details are in the archivees somewhere. That was going on in June July and Aug of 2011, which may make it easier to find. Tracy also engineered a fix. His solution is in the archives too. He also seemed to think that the flex plate was good enough for a normially aspirated 13b, but after seeeing what happend to mine, I believe that even a n.a. 13b would eventually fatugue the flex plate into the same result. As I recall, at least one other person detected cracks in the same place. Best, Dave Leonard On Sun, Oct 28, 2018, 4:23 AM Joseph Berki jskmberki@windstream.net < flyrotary@lancaironline.net> wrote: > > > I believe that Dave Lenard had an issue with cracks appearing in the > flexplate. He came up with a solution and does anyone recall the detail= s > of the solution and would it work for all 13bs with Tracy=E2=80=99s PSRU? > > Joe Berki > --0000000000001f7ef605794d8c70 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Joe,
Yes, my flex plate not only deve= loped cracks but basically disintegrated.=C2=A0 Keep in mind that I was run= ning about 300hp at rookie school for Reno.=C2=A0 None the less, the flex p= late was never designed to transmit the output of engine, just allow the st= arter to turn it over.=C2=A0 The lightening holes in it alow flexing that i= nitiated the cracks, then the whole thing shattered.=C2=A0 Surprisingly, in= my case the pieces happend to jam together in such a way that it still fun= ctioned until I happend to find it on inspection several flight hours later= .

All the details of my = fix are in the archives somewhere, but basically I replaced the flex plate = with an off the shelf lightweight flywheel that I addapted to accept tracys= damper plate.=C2=A0 I took it to a machine shop to have the mounting holes= correctly placed.=C2=A0 I also had it balanced, but I probably could have = skipped that step.=C2=A0 I also had to machine a recess into Tracys mountin= g plate to allow the starter to reach the teeth on the flywheel.=C2=A0 Deta= ils are in the archivees somewhere.=C2=A0 That was going on in June July an= d Aug of 2011, which may make it easier to find.
Tracy also engineered a fix.=C2=A0 His solution is= in the archives too.=C2=A0 He also seemed to think that the flex plate was= good enough for a normially aspirated 13b, but after seeeing what happend = to mine, I believe that even a n.a. 13b would eventually fatugue the flex p= late into the same result.=C2=A0 =C2=A0As I recall, at least one other pers= on detected cracks in the same place.

Best,
Dave Leonard

On Sun, Oct 28, 2018, 4:23 AM Josep= h Berki jskmberki@windstream.ne= t <flyrotary@lancairo= nline.net> wrote:

=C2=A0

I believe that Dave Lenard had an issue with cracks appear= ing in the flexplate.=C2=A0 He came up with a solution and does anyone reca= ll =C2=A0the details of the solution and would it work for all 13bs with Tr= acy=E2=80=99s PSRU?

Joe Berki

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