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_msn.com>
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 - 11:03:46 CEST