From: "Marc Wiese cardmarc@charter.net" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Flexplate cracks
Date: Thu, 9 Jan 2025 12:15:44 -0600
Message-Id: <F0ACD382-E651-4709-B9D5-7160CE62B48D@charter.net>
References: <list-3781070@lancaironline.net>
In-Reply-To: <list-3781070@lancaironline.net>
To: flyrotary@lancaironline.net

Has the cause of these cracks been uncovered, and if so, what is the current=
 thinking on it? An AL racing plate?
M
Sent from my iPhone

> On Jan 9, 2025, at 1:31=E2=80=AFAM, Steven W. Boese SBoese@uwyo.edu <flyro=
tary@lancaironline.net> wrote:
>=20
> =EF=BB=BFSteve,
>=20
> I didn=E2=80=99t see the cracks prior to disassembly and doubt that they c=
ould have been seen on the counterweight side very well -if at all- when ass=
embled.
>=20
> I replaced the Flexplate with a steel flywheel about a year ago.  Since th=
en, I replaced the four rubber dampers with machined aluminum discs giving a=
 solid connection and then dynamically balanced the system.  This was done b=
ecause maintaining a dynamic balance wasn=E2=80=99t possible with the damper=
s.  Only a few hours of flight have occurred in this configuration so far an=
d there has been no indication of problems resulting from this change.
>=20
> Steve Boese
>=20
>> On Jan 8, 2025, at 11:03=E2=80=AFPM, Stephen Izett stephen.izett@gmail.co=
m <flyrotary@lancaironline.net> wrote:
>>=20
>> =EF=BB=BF=E2=97=86 This message was sent from a non-UWYO address. Please e=
xercise caution when clicking links or opening attachments from external sou=
rces.
>>=20
>>=20
>> Hi Steve
>>=20
>> Is this recent then?
>>=20
>> I=E2=80=99m not able to get to my aircraft at present to check my flex pl=
ate which has probably seen 50 hours of service.
>>=20
>> Was it possible to see these cracks assembled?
>>=20
>> I would appreciate your reflections on Tracys latter choice to remove the=
 damper, and particularly when using a timber/glass prop such as an MT.
>>=20
>> It would be great to have an update and current info from Tracy regarding=
 his no damper hours if anyone can contact him.
>>=20
>> Very helpful, thanks again Steve
>>=20
>> Steve
>=20
> --
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