X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) From: "David Leonard wdleonard@gmail.com" Received: from mail-ot1-f44.google.com ([209.85.210.44] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1014913 for flyrotary@lancaironline.net; Sun, 06 Dec 2020 16:47:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.44; envelope-from=wdleonard@gmail.com Received: by mail-ot1-f44.google.com with SMTP id b18so10824455ots.0 for ; Sun, 06 Dec 2020 13:47:23 -0800 (PST) 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=ZiodhR/JJuWi+o6OKPLFoqZpCZBDTohFaa2SL9oRoTc=; b=hDB3JQ8FUq9mcWPFxyaAbM5oxzp9vMi3uLTSmieJAuBEOfZy4ETzNmjBtBiL8m4tFJ N2RuG0MPbov6dIk+zx6xvk/7KIfNNxb3keePz3C/Lnr5MCTQjG4O5du+gUU6NDDSn9Ma 4JNZynER3mSOFd7RhAyBDXimbSw4/4LgYUFHsVJHLHmc7/moCsv+s1jqUWpfioxYQcWq CRRSxNYtL8RpTKtFJAnYsh2uu1huhGhdMx05jOlULb2zJKv/Hff4x/xyz70OEsn6Woib U55ZVIwOLtfIL3vXY0CHfoqyMTqni7KuzZhL0OGD4O9SgeSQhvbX51R/XVVjqlg2OSyR /g6Q== 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=ZiodhR/JJuWi+o6OKPLFoqZpCZBDTohFaa2SL9oRoTc=; b=YG/zqN8MfbzzEgBSbCLaktpg1dKuMtfYEwmeUZdypv/jAOSYKIdHwa/k5cThY+GtgL cN1ebUok9O5t2mq8gW0nL+1NnfZz8OlgpWuxrLhaq0PXC9pdbOVpnB3KpiqIRZZIWj/D Gs0hnOZe8ymMBTgsAxM6JMwreMYm3xmla5Bc35PtWg5CA1OJqL/KIDT0UHHh44QVY9lb OPb30l1DyKmYJx8OT1NJjKldhjOT0aoJnjTljJ2bBfUqYrxOkqWhEmvMcJKqPEQ2w1Ac FwMZz0rssvKcCKY75ZYFFmdV8fgeGgG3NzrvMHmOT4qc9nWpr74x1/MUOPurl7PXOZsC J50Q== X-Gm-Message-State: AOAM5322Q35kZxpKRQnRFtZSYIDM4Re44cnEDx4CK2KFmch9W37M2W1A aLyDR/ylOIQWIz0Nj626oDFdU4ktZdolincHPsbh4gsP+08= X-Google-Smtp-Source: ABdhPJxEu8nxyaWEy8kydkNq9sPpjoozF/tF6c89BsmOyfl3U4ywvlVAuo9CN3w4MVDhjYk3WFfB8SP6c9RNvT/q224= X-Received: by 2002:a05:6830:1396:: with SMTP id d22mr10787046otq.242.1607291225738; Sun, 06 Dec 2020 13:47:05 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: Date: Sun, 6 Dec 2020 13:46:55 -0800 Message-ID: Subject: Re: [FlyRotary] Re: RD1-C damper To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="0000000000008f931705b5d2a6f2" --0000000000008f931705b5d2a6f2 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I was turbocharged and racing at Reno. I had about 800 hrs on the flex plate at the time. However, the flexplate was never intended to transmit the engine torque and it will eventually fail even with the loads transmitted by a stock engine. There have been several examples of cracks appearing in stock engines. Dave Leonard Turbo Rotary RV-6 N4VY On Sun, Dec 6, 2020 at 11:08 AM argoldman@aol.com < flyrotary@lancaironline.net> wrote: > Dave, were you running a stock 13B did you P/P it or any power increasing > additions (or subtractions)? > > Thanks > > Rich > > In a message dated 12/6/2020 12:41:30 PM Central Standard Time, > flyrotary@lancaironline.net writes: > > > > > On 12/6/2020 10:52 AM, David Leonard wdleonard@gmail.com wrote: > > Steve, you are right. The Issue is cracking og the auto-tranny flex > plate. Mine failed entirely. I highly recommend making the change soone= r > rather than later. > > Dave Leonard > > On Sun, Dec 6, 2020, 12:48 AM Stephen Izett stephen.izett@gmail.com < > flyrotary@lancaironline.net> wrote: > > Hi Charlie > > I thought people moved to the race flywheels because the flex plates were > cracking. > I hadn=E2=80=99t heard of the Engine/Drive/Prop needing a flywheel mass. > I found some info on the forum archive but nothing to draw it all togethe= r. > I=E2=80=99ll have a good look at the flexplate when I pull the drive and = check for > cracking, but unless I hear otherwise I plan to reuse the flex plate. > > Thanks > > Steve > > > > > > > > On 6 Dec 2020, at 8:58 am, Charlie England ceengland7@gmail.com < > flyrotary@lancaironline.net> wrote: > > > > On 12/5/2020 6:35 PM, Stephen Izett stephen.izett@gmail.com wrote: > >> Hi team > >> > >> Having completed phase #1 testing of the Glasair Super IIRG power by > Renesis and RD1-C redrive, I=E2=80=99re going to pull the redrive for its= 25 hourly > initial inspection. > >> > >> Tracy deleted the damper assembly from the last rendition of his desig= n > and I=E2=80=99m considering removing ours by creating a new adapter plate= from the > existing splined > >> part that is currently riveted to the damper and adding some longer > bolts and spacers. > >> > >> Has anyone heard anything further in regard to RD receives with the > damper removed? > >> Has Tracy given any further updatess? > >> All I have read was after initial tests some years ago. > >> > >> Cheers > >> > >> Steve. > > Best I remember is that you need either an aluminum or steel racing > flywheel, to get more mass on the engine side of the system. IIRC, it's > also limited to low mass (wood, etc) propellers. The ones he sold had a > different input shaft, but I think Dave Leonard modified his RD1-C & to u= se > a steel racing flywheel which was only slightly heavier than the aluminum > version. Search for Dave's posts, if he doesn't chime in. I've been > wondering if Guibo/Rototflex couplers could be a viable alternative to th= e > aluminum plate/rubber discs. Probably would weigh more, and definitely co= st > more. > > > > Charlie > > I've got a flexplate from a salvage yard that is cracked (never flown). O= n > the other hand, I think Tracy had over a thousand hours on his without > cracking, before switching to the RD2. > > Here's an archived RWS page from the Wayback Machine: > > https://web.archive.org/web/20121230061959/http://www.rotaryaviation.com/= RD-2C.htm > and > > https://web.archive.org/web/20121230065615/http://www.rotaryaviation.com/= faq's.htm > > Charlie > > > Virus-free= . > www.avast.com > > > --0000000000008f931705b5d2a6f2 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I was turbocharged and racing at Reno.=C2=A0 I had about 8= 00 hrs on the=C2=A0flex plate at the=C2=A0time.=C2=A0 However, the flexplat= e was never intended to transmit the engine torque and it will eventually f= ail even with the loads transmitted by a stock engine.=C2=A0 There have bee= n several examples of cracks appearing in stock engines.

Dave Leonard
Turbo Rotary RV-6 N4VY

On Sun, Dec 6, 2020 at = 11:08 AM argoldman@aol.com <flyrotary@lancaironline.net= > wrote:
Dave, were you running a stock 13B did you P/P it or any p= ower increasing additions (or subtractions)?
=C2=A0
Thanks
=C2=A0
Rich
=C2=A0
In a message dated 12/6/2020 12:41:30 PM Central Standard Time, flyrotary@lancaironli= ne.net writes:
=C2=A0


On 12/6/2020 10:52 AM, David Leonard wdleonard@gmail= .com wrote:
Steve, you are right.=C2=A0 The Issue is cracking og the auto-tranny f= lex plate.=C2=A0 Mine failed entirely.=C2=A0 I highly recommend making the = change sooner rather than later.
=C2=A0
Dave Leonard

On Sun, Dec 6, 2020, 12:48 AM Stephen Izett = stephen.izett@gmail.com <flyrotary@lancaironline.n= et> wrote:
Hi Charlie

I thought people moved to the= race flywheels because the flex plates were cracking.
I hadn=E2=80=99t= heard of the Engine/Drive/Prop needing a flywheel mass.
I found some in= fo on the forum archive but nothing to draw it all together.
I=E2=80=99l= l have a good look at the flexplate when I pull the drive and check for cra= cking, but unless I hear otherwise I plan to reuse the flex plate.

T= hanks

Steve






> On 6 Dec 2020, at 8:58 a= m, Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net> wrote:
>
> On 12/5/2020 = 6:35 PM, Stephen Izett stephen.izett@gmail.com wrote:
= >> Hi team
>>
>> Having completed phase #1 testing= of the Glasair Super IIRG power by Renesis and RD1-C redrive, I=E2=80=99re= going to pull the redrive for its 25 hourly initial inspection.
>>= ;
>> Tracy deleted the damper assembly from the last rendition of= his design and I=E2=80=99m considering removing ours by creating a new ada= pter plate from the existing splined
>> part that is currently riv= eted to the damper and adding some longer bolts and spacers.
>> >> Has anyone heard anything further in regard to RD receives with = the damper removed?
>> Has Tracy given any further updatess?
&g= t;> All I have read was after initial tests some years ago.
>> =
>> Cheers
>>
>> Steve.
> Best I remember= is that you need either an aluminum or steel racing flywheel, to get more = mass on the engine side of the system.=C2=A0 IIRC, it's also limited to= low mass (wood, etc) propellers. The ones he sold had a different input sh= aft, but I think Dave Leonard modified his RD1-C & to use a steel racin= g flywheel which was only slightly heavier than the aluminum version. Searc= h for Dave's posts, if he doesn't chime in. I've been wondering= if Guibo/Rototflex couplers could be a viable alternative to the aluminum = plate/rubber discs. Probably would weigh more, and definitely cost more.>
> Charlie
I've got a flexplate from a salvage yard that is cracked (never flown).= On the other hand, I think Tracy had over a thousand hours on his without = cracking, before switching to the RD2.

Here's an archived RWS pa= ge from the Wayback Machine:
https://web.archive.org/web/20121230061959/http://ww= w.rotaryaviation.com/RD-2C.htm
and
https://web.archive.org/web/2012123= 0065615/http://www.rotaryaviation.com/faq's.htm

Charlie

3D"" Virus-free. www.avast.com
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