Bill,
I would be curious to hear about any experiments with Teflon
bushings. I do know that Teflon is a difficult plastic to work in
precision. It has one property that can be frustrating. It moves,
that is it willingly changes shape during any machining process
and/or during a Teflon part's life. I worked at a plastics company
that specialized in machine plastic parts and we just loved the
contracts for machining Teflon. They were worded based on Teflon
consumed in production, not by the amount of finished, QC'd parts.
Tom Sanders
--- In Indoor_Construction_at_yahoogroups.com, "Bill Gowen"
<b.gowen_at_...> wrote:
>
> Not from Tom but an answer anyway!
>
> I was told a couple of years ago to use 2 Teflon washers to get
the lowest possible coefficient of friction. This is one of those
forehead slap things - "Why didn't I think of that before!". Teflon
against Teflon is going to be better than Teflon against anything
else. At some point in time I might try Teflon bushings in a thrust
bearing. Small diameter tubing is available and it can be made still
smaller by stretching while heating. (thanks to the R/C DLG guys for
this info)
>
> 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)
>
> ----- Original Message -----
> From: LeRoy C Cordes
> To: Indoor_Construction_at_yahoogroups.com
> Sent: Friday, April 20, 2007 10:55 AM
> Subject: [Indoor_Construction] Re: Washers ?
>
>
> Tom, you mention teflon washers - I have been wondering is it
sufficient
> to use one or should I be using 2 of them on my planes ?
>
> LeRoy Cordes
> AMA 16974
> Chicago, IL
> In God We Trust
>
> On Fri, 20 Apr 2007 14:10:29 -0000 "soslipstream"
<parkreation_at_...>
> writes:
> > Think Pennyplane when fitting out a no-cal. Use teflon washers
on
> > the propshaft.
> >
> > A light but stiff motorstick is paramount. Walt Eggert in
Phila
> > built a no-cal P-38 detailed exactly like the one that he was
the
> > mechanic for in WWII. One of the famous features was the use
of
> > rolled tube motorsticks,split down the center line to save
weight,
> > with zero torsional problems.
> >
> > A real gem to see fly with counter-rotating, 3 blade props. He
> > always made winning flight times and used to kid how it was
set-up
> > to mimic his full sized charge right down to the leaned-out
engines
> >
> > for long overwater flights.
> >
> > Tom Sanders
> >
> >
> > --- In Indoor_Construction_at_yahoogroups.com, "papadesign1"
> > <papadesign1_at_> wrote:
> > >
> > > Thanks,
> > > Is there any kind of combination of washers and beads that
you
> > use?
> > > I have tried making some wire pig tail bearings but they
> > seem "noisy"
> > > I am not sure if it is too loose or if the prop hole is off
center
> >
> > or
> > > what. Obviously I am trying to make the whole thing as
friction
> > free
> > > as possible...
> > >
> > > --- In Indoor_Construction_at_yahoogroups.com, "jeffrey.hood"
> > > <jhood_at_> wrote:
> > > >
> > > >
> > > > Wire pigtail bearings are fine, and not too difficult to
> > make...
> > > And
> > > > all you need is a piece of .020 wire and a -good- pair of
> > pliers...
> > > > But if you haven't bent one before, it can be a challenge
at
> > first
> > > > until you figure it out... Harlan bearings are good also,
> > > especially
> > > > the SO size if he still makes them...
> > > >
> > > > Also, at http://www.aeroaces.com/flymodsup2.htm you can
get a
> > > bearing
> > > > that he made that is nice for No-Cal... you have to get
Peck
> > nylon
> > > > thrust bearings also for them...
> > > >
> > > > Harlan's page is at:
> > > http://www.indoorduration.com/HarlanBrochure.htm
> > > >
> > > > I have a file somewhere that shows how to bend wire
bearings if
> > you
> > > > can't find the information anywhere...
> > > >
> > > > JH
> > > >
> > > > > Novice question...
> > > > >
> > > > > What is the BEST combination of washers beads
> > > > > and best prop hanger.-wire pigtail,harlin pigtail,
aluminum
> > > tubing,
> > > > > nylon thrust bearing...??-----For A Nocal model
> > > > > And where would I get these items.
> > > > >
> > > > >
> > > > > Thanks!
> > > > >
> > > >
> > >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
>
> LeRoy Cordes
> AMA 16974
> Chicago, IL
> In God We Trust
>
>
>
>
> [Non-text portions of this message have been removed]
>
Received on Fri Apr 20 2007 - 15:01:10 CEST