Hey Charles,

Your idea of using rods set flat side by side on a
board (actually 2 boards), for carbon levitation
does work.  I got a number of .242" diameter carbon
rods, and tried it with wide 2 pole (normal) neodymium
magnets.  One was a "wing" shape, and another
with 5 points, and they both worked.  I used 
eight side by side, but it would have worked
with less...depending on the width/length of
the neo floated.

Afew very interesting effects showed up right
away with this type of surface:

One; when disturbed it wasn't unusual for 
the floating neo to bang against the top and
bottom of the carbon/rod sandwich, they seemed
to have wider range in other words.  Probably
not surprising for the undulating surface
instead of a flat surface.

Two; both of this neo magnets floated without
the aid of additional "bias magnets", to 
offset dragging tilts.  They weren't perfect
but no point touched the carbon.  Regardless,
I used acouple magnets on either side, which
helped correct tilts from the horizontal, and
sometimes they acted to assist centering
between the carbon layers.

It was definately easier to float neodymium
magnets overall.  I even floated the little
Radio Shack Cat No. 64-1895 neo disk quite
easily over these rods.

There may be explanations, I think the rods
were more diamagnetic than my smooth
surface carbon brushes.  The rods were laid
out where from the end view, the rods sat
vertically aligned atop each other (not like
a rod nestled in the valley of the opposing
rods/carbons/plate). 

.......................................

Sometimes, I think a old but very large
meter movement, with its torsion spring,
could provide somewhat of a "scale" with
diamagnetics?  One might have to remove
the meter magnet and mount something like the
tiny radio Shack magnet on the end of the pointer?
Speculating.

........................

Another minor side note, I used my string
/beam balance to note the repulsion diamagnetics
in my hand coming close.  Water is diamagnetic. 

Thanks for the rod side by side suggestion,

Meredith Lamb




   










I would expect some limit on rod size v/s
neo floated; but thats the only size I have.  

 


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