Re: FROM HAL - Starfish Spinner

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Frank <fxrays@xxxxxxxxxx>

A cheap jeweled bearing is available from sporting goods or novelty 
shops. Buy a cheap 1 1/2" or 2" compass and take it apart. You have 
the jewel and a hub you can make a low friction spinner out of. Any 
good sharp pin will be a good shaft.
Frank

At 11:08 PM 2/27/2007 -0700, you wrote:
> Original poster: "resonance" <resonance@xxxxxxxxxxxx>
>
>
>
>
> Sometimes a good jeweled needle bearing assembly can offer even less 
> friction.  They are not too expensive and have very low 
> friction.  They are also made in very small sizes.  Tucson Bearing 
> may be able to order them for you.
>
> Dr. Resonance
>
> > Ed was curious how fast my spinner spins, so I shot another video to show
> > him:
> >
> > http://www.halice.com/physics/4coil/spin2.wmv
> >
> > I don't think it is revolving much fast than 2 to 3 times per second. Here
> > is the video of it in the dark again:
> >
> > http://www.halice.com/physics/4coil/spin1.wmv
> >
> > Hal in Tucson
> >
> >
> > ----- Original Message -----
> > From: "The Krohns" <2halice@xxxxxxx>
> > To: "Tesla list" <tesla@xxxxxxxxxx>
> > Sent: Monday, February 26, 2007 2:40 AM
> > Subject: Re: FROM HAL - Starfish Spinner
> >
> >
> > > Hi Ed,
> > >
> > > After running the coil for about 5 minutes, the spinner looks as 
> > though > it
> > > is revolving approximately 3 revolutions per second, or 180 rpm.  I'm
> > going
> > > to take DC's advice and raise the spinner's pivot point tomorrow
> > afternoon.
> > > I'll place a timing mark on the spinner and video tape it 
> > during > daylight
> > > hours.  I'll put the video on my Web site and post the URL on the List.
> > > I'll try to do this early enough tomorrow afternoon so that 
> > our > moderator
> > > should be able to post it before dark MST.  This is so much fun!
> > >
> > > Cordially, Hal in Tucson
> > >
> > >
> > > ----- Original Message -----
> > > From: "Tesla list" <tesla@xxxxxxxxxx>
> > > To: <tesla@xxxxxxxxxx>
> > > Sent: Sunday, February 25, 2007 6:05 PM
> > > Subject: Re: FROM HAL - Starfish Spinner
> > >
> > >
> > > > Original poster: Ed Phillips <evp@xxxxxxxxxxx>
> > > >
> > > > Neat picture.  How fast does the spinner run?  Not light enough to
> > > > see very well and the strobe effects with the sparking make it hard to
> > > tell.
> > > >
> > > > Ed
> > > >
> > > >
> > > >
> > > >
> > > >
> > >