From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] RD1-C damper
Date: Sun, 6 Dec 2020 16:48:06 +0800
References: <list-1012547@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-1012547@logan.com>
Message-Id: <BC47F163-DBCD-4DEA-B44E-EF7E9706F1D4@gmail.com>

Hi Charlie

I thought people moved to the race flywheels because the flex plates =
were cracking.=20
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 =
together.
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:
>=20
> On 12/5/2020 6:35 PM, Stephen Izett stephen.izett@gmail.com wrote:
>> Hi team
>>=20
>> 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.
>>=20
>> Tracy deleted the damper assembly from the last rendition of his =
design 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.
>>=20
>> 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.
>>=20
>> Cheers
>>=20
>> 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.
>=20
> Charlie
>=20
> --=20
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>=20
>=20
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