X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) From: "Charlie England ceengland7@gmail.com" Received: from mail-il1-f175.google.com ([209.85.166.175] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1014572 for flyrotary@lancaironline.net; Sun, 06 Dec 2020 13:41:28 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.166.175; envelope-from=ceengland7@gmail.com Received: by mail-il1-f175.google.com with SMTP id 2so7040821ilg.9 for ; Sun, 06 Dec 2020 10:41:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language; bh=I/VJNNd1y37CHeLlecYQ6kxH5Udkup5jUblYMkzBmtA=; b=QGehcAygpMrfCQDIxF/VPwmUINJpZ2D2jEKTxVRa30ECd1sNKilNHo3fd+UwzcgBhV khdv9bS2k5TsM+T8avxQjYJMtd2lDXkWIL9UMqjbtGB8bG/93Y0fZIhp0iIEOVpd4NGb lAhSO0oZmapyFjiNO5MPDdnsypzP93pxAwlUMlxksU+2e9TuOyHhHOQQC5YoqIoV/3r1 Bbw0pvWPb4y4xAq6VREpyYg66Ed1+AdYoBguuPQD7mxgEtXzmKBc+nNbxbrT3AbkSbMT ppHJ1yo77YwbXRZSh4uiyWz+hDrJ5O5rdKacsYccgiyEq+40RQykxbS08C/v7585AG7p 3M1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language; bh=I/VJNNd1y37CHeLlecYQ6kxH5Udkup5jUblYMkzBmtA=; b=RIXn2AUvi33Cyl0Uer5Vz8YUGBC50eF6jh2P/zq5kAEBNuw6pNquMy79djrWc9qWzK wVBf0WB5PIo5gK2yCaujfmGbkSPGWH4iZikLJKW0GNbF2D7Js7VUlxGakwm1CeAhc8Xz iWQgpP6iPHJtDQ8PCaepNk2sJr9zVVW73TgAIL5dwI6+RZlZ+0GVHH80+QSNRIo3g9V0 z+SiwhC3UiNarJWnp9eNkwMQHu6bsZ7NIVabvh6xMZkLHhB/cWLvH3JVBqvL5jkflQef 0RBg3sxAcibvjDwVzGMwTMoSDCdMRhE0D5fRFxllhEtB38TsnH87DMzuTZE9sykOzA1B 16zg== X-Gm-Message-State: AOAM533cVePktJuP0kbAeS8LjhJICP6HHREzRAkYFU2LmQh1ke5S5gkC URcFSF/fgwZnKC27Kdu05chhenhiXGk= X-Google-Smtp-Source: ABdhPJzOShW+Uzl2630Unya1jTIR0hrxj7z7kGmJSNBjFYCifRM94KF+MVkdA/9Wvc7imSWedW3hgw== X-Received: by 2002:a92:d7d2:: with SMTP id g18mr7435146ilq.2.1607280071357; Sun, 06 Dec 2020 10:41:11 -0800 (PST) Return-Path: Received: from ?IPv6:::1? ([2607:fb90:99bb:5870:b88c:e93a:3b28:7352]) by smtp.googlemail.com with ESMTPSA id r15sm5826509ila.69.2020.12.06.10.41.09 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 06 Dec 2020 10:41:10 -0800 (PST) Subject: Re: [FlyRotary] Re: RD1-C damper To: Rotary motors in aircraft References: Message-ID: Date: Sun, 6 Dec 2020 12:42:56 -0600 User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/alternative; boundary="------------BE1D576BCE83146A04632BDC" Content-Language: en-US X-Antivirus: Avast (VPS 201206-2, 12/06/2020), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. --------------BE1D576BCE83146A04632BDC Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit 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 > sooner rather than later. > > Dave Leonard > > On Sun, Dec 6, 2020, 12:48 AM Stephen Izett stephen.izett@gmail.com > > wrote: > > Hi Charlie > > I thought people moved to the race flywheels because the flex > plates were cracking. > I hadn’t heard of the Engine/Drive/Prop needing a flywheel mass. > I found some info on the forum archive but nothing to draw it all > together. > I’ll 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 > > 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’re 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’m 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 use 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 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 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 -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus --------------BE1D576BCE83146A04632BDC Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit


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 sooner 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’t heard of the Engine/Drive/Prop needing a flywheel mass.
I found some info on the forum archive but nothing to draw it all together.
I’ll 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’re 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’m 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 use 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 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 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

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