On Aug 9, 2009, at 4:37 PM, Kyle Mcallister wrote:
I still find the motor interesting, because everyone wrote it off
as a thermal thing. This seems, as you suspect, to be magnetic,
albeit in a different way than expected. It also dumbfounds people
I show it to, so that's a nice plus. :)
Well, Kyle, the ball bearing motor may just have some anomalies left
up its sleeves. Looks like the back emf possibly doesn't increase
with rpms, at least in some range. How strange is that?
And then there is the major fact it can't be run backwards to
generate electricity! Where's the symmetry!?
If you get a chance you might try measuring the voltage drop across
your motor at differing speeds or loads. Not sure how you would load
it consistently though. It might be of interest to just get some
kind of picture of what happens to the voltage across the motor and
across some resistance in the circuit, say a power cable, as the rpms
build.
It's probably not all that important, but I am pretty sure the BB
motor performance improves if the shaft is made of aluminum or
copper, due to the much lower resistance.
I'm thinking about possibly scaling up my experiment to a bigger
power supply, bigger bearings, and adding a dynamometer and/or
variable speed motor to the shaft. I guess that might be jumping to
fast, because there is probably yet more to learn with a small rig.
If I find brass bearings, I will get some and try them. One of my
close friends is a machinist. He might have a way of finding out.
--Kyle
Somehow proving the effect is not magnetic no longer seems so
important to me. 8^) Wouldn't you just love to see a true anomaly
pop out of this? The odds are very very small, but the
inconsistencies still remain ...
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
