N-machine theory tested

[Craigy]

I have played with homopolars, they really are cool and mystifying. No back emf at all, But their greatest downfall is the contacts with rim of the disc, hence teslas novel method of having a chain drive between 2 discs, the chain or conductive belt having a larger area in contact with the edge of each to reduce the sparking. But although no emf , the pickup methods are so full of friction that ou is unlikely.

But great non the less, here is a small vid of a homopolar mounted in the chuck of my lathe. everything rotates together, 2 micowave magnets with a Ali disk..the faraday paradox

http://www.youtube.com/watch?v=75p5JwlXwlo

[PaulLowrance]

That video brings back memories. DePalma also showed me a demo of shorting the N-machine. I don't know if it proves anything though. You can also short a conventional faraday generator like that and it doesn't seem to slow down much that you can notice. The problem is that it's extremely difficult to get low resistance. Contact resistance can easily be 10 to 30 mOhm on stationary contact, and hundreds of milli ohms on a moving contact like that. Say 50mV output & 100mOhm = 0.025 watts.

[broli]

@Craigy your results are surprising. Would you mind performing some extra experiments on that setup. Mainly increasing the radius of the current aluminum disc by atleast 2-3 times or using smaller magnets. What you want to measure is the voltage while each time brushing on a bigger radius on the disc. Start out very close to the magnet and take not of voltage, then gradually increase the radius. This should make the voltage go to 0, IF then at a slightly bigger radius the voltage reverses polarity then you have made an important discovery which I'll be happy to explain why. Could you try this out please.

[gravityblock]

Broli,

It appears Craigy's device is producing AC.  Look how the readings from the volt meter jumps up and down the way it does.  The polarity must be switching somewhere.  If it is, then it's due to particle drift which I go into more detail below.  All he needs to do is set his volt meter to AC, then test.  I wonder if those magnets are radial magnetized. 

I posted the below design in this thread a while back using a radial magnet, http://www.overunity.com/index.php?topic=5662.msg206989#msg206989

The blue disc is stationary and is not cutting the field, but the electrons flowing onto the blue disc from the red disc will cut the field of the south pole while moving towards the rim of the blue disc.  I call this particle drift (The electrons cut the field, but the conductor doesn't).  Brushes are needed to connect the inner and outer discs, but it allows you to spin a smaller mass, which requires less energy. So, the losses in the brushes and the energy saved in spinning a smaller mass probably negates each other.  I have the inner disc to rotate, while the outer disc is stationary to produce a DC current.....but AC could be produced with both of them rotating together such as Craigy's device, assuming his magnet's are radially magnetized. 

GB

[gravityblock]

In Craigy's device, the disc is larger than the magnets and is not totally contained within the magnetic field of the magnets.  Wouldn't this cause eddy currents in the disc which could be responsible for the fluctuations in voltage?

GB