Thanks all, guess I will run two and will mark them and try to remember
to check them after a flight.
LeRoy Cordes
AMA 16974
Chicago, IL
In God We Trust
On Tue, 24 Apr 2007 13:10:26 -0000 "Tom Juell" <vinfiz1911_at_verizon.net>
writes:
> I can confirm that teflon rubs off on the mating material. In
> designing process equipment we found that teflon coatings applied
> to
> surfaces would rapidly disappear as thousands of products ran over
> that surface.
>
> The other nice thing about the teflon is the static and dynamic
> coefficient of friction are the same. However I would run two
> teflon
> washers because there may be more of a tendency for the non teflon
> mating surface to have very small burrs or surface conditions that
> would cause more of a grabbing or galling action between the two
> materials. The first teflon washer would provide a known base for
> the
> second thrust washer.
>
> Of course it has been 45 years since I knew everything so take
> these
> thoughts with a grain of salt and do your own experimenting. To me,
> a
> lot of this hobby is the pleasure of finding things out.
>
> Tom
> New York City
>
>
> --- In Indoor_Construction_at_yahoogroups.com, "Rszanti" <Rszanti@...>
> wrote:
> >
> >
> > FYI - Teflon against Teflon has a co-efficient of friction that is
> .04.
> > Teflon running against steel (or almost any hard surface) has a
> > co-efficient of friction of .04. Yep, there's NO difference.
> Actually
> > the Teflon rubs off on the opposing surface leaving a Teflon
> against
> > Teflon running surface no matter what opposing material you use.
> The
> > opposing surface should be hard and smooth though, for example,
> aluminum
> > would work just fine. I also believe there's now a Teflon
> impregnated
> > with molybdenum disulfide that has an even lower co-efficient.
> > There's also many other materials, such as Delrin, than are
> > available with impregnated ingredients that lower the friction
> > co-efficient and the co-efficient approaches that of Teflon while
> these
> > other materials provide greater wear resistance.
> >
> > How do I know ? I came from an industry that used these materials
> to
> > improve their products. I was an engineer that did the research to
> find
> > them.
> >
> > Richard
> >
> >
> >
> >
> > --- In Indoor_Construction_at_yahoogroups.com, LeRoy C Cordes
> <lcordes_at_>
> > wrote:
> > >
> > > Thanks for the answer, Bill. Thinking about it I wondered if I
> > shouldn't
> > > be using more than one of them.
> > >
> > > ALSO - it's great that someone, FINALLY, released the secret to
> being
> > a
> > > record holder <VBG>
> > >
> > > LeRoy Cordes
> > > AMA 16974
> > > Chicago, IL
> > > In God We Trust
> > >
> > > On Fri, 20 Apr 2007 14:02:45 -0400 "Bill Gowen" b.gowen_at_
> > > writes:
> > > > Not from Tom but an answer anyway!
> > > >
> > > >
> > > > Having adopted the 2 washer plan, I now possess National
> Records in
> > > > all the classes I fly at all ceiling heights.
> > > > (this is a joke)
> > >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
LeRoy Cordes
AMA 16974
Chicago, IL
In God We Trust
Received on Tue Apr 24 2007 - 09:22:52 CEST
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