From: "William Jepson wrjjrs@gmail.com" <flyrotary@lancaironline.net>
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Date: Mon, 5 Nov 2018 13:08:06 -0800
Message-ID: <CAN=mtae0ByfaP81XOCm882N8VL4WcnTViU7JoOWa2AzkCHmHsg@mail.gmail.com>
Subject: Re: [FlyRotary] Flexplate replacement
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Joe and group,
The thing to remember about the flex plate is that it is designed to be
mated to a big fluid coupling. That GREATLY lessens the shock loads on the
flex plate. Using it directly bolted to the drive allows all kinds of
different vibration loads and torsional loads it may not have been designed
for.
Bill J

On Mon, Nov 5, 2018 at 12:11 PM Joseph Berki jskmberki@windstream.net <
flyrotary@lancaironline.net> wrote:

> I have been looking at various flywheels for possible candidate
> replacement.
>
> I thought the aluminum units would provide the least amount of weight gain.
>
> I noticed that there are a lot of holes in these units including the
> replaceable friction area with many screw holes.
>
> I was under the impresion that the holes in the flexplate promoted stress
> cracks.
>
> These flywheels however may have sufficient material to counteract the
> stress potential.
>
> Can someone provide a brand or part number that is acceptable?
>
> I believe that the additional machining to modify one of these flywheels
> is the holes for the torsional damper.
>
> Thanks for any help.
>
>
>
> Joe Berki
>

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<div dir=3D"ltr">Joe and group,<div>The thing to remember about the flex pl=
ate is that it is designed to be mated to a big fluid coupling. That GREATL=
Y lessens the shock loads on the flex plate. Using it directly bolted to th=
e drive allows all kinds of different vibration loads and torsional loads i=
t may not have been designed for.</div><div>Bill J</div></div><br><div clas=
s=3D"gmail_quote"><div dir=3D"ltr">On Mon, Nov 5, 2018 at 12:11 PM Joseph B=
erki <a href=3D"mailto:jskmberki@windstream.net">jskmberki@windstream.net</=
a> &lt;<a href=3D"mailto:flyrotary@lancaironline.net">flyrotary@lancaironli=
ne.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"=
EN-US" link=3D"#0563C1" vlink=3D"#954F72"><div class=3D"m_-6749426314022096=
500WordSection1"><p class=3D"MsoNormal">I have been looking at various flyw=
heels for possible candidate replacement.<u></u><u></u></p><p class=3D"MsoN=
ormal">I thought the aluminum units would provide the least amount of weigh=
t gain.<u></u><u></u></p><p class=3D"MsoNormal">I noticed that there are a =
lot of holes in these units including the replaceable friction area with ma=
ny screw holes.<u></u><u></u></p><p class=3D"MsoNormal">I was under the imp=
resion that the holes in the flexplate promoted stress cracks.<u></u><u></u=
></p><p class=3D"MsoNormal">These flywheels however may have sufficient mat=
erial to counteract the stress potential.<u></u><u></u></p><p class=3D"MsoN=
ormal">Can someone provide a brand or part number that is acceptable?<u></u=
><u></u></p><p class=3D"MsoNormal">I believe that the additional machining =
to modify one of these flywheels is the holes for the torsional damper.<u><=
/u><u></u></p><p class=3D"MsoNormal">Thanks for any help.<u></u><u></u></p>=
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Joe B=
erki<u></u><u></u></p></div></div></blockquote></div>

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