Latest: No back torque generator.

[petersone]

Hi Low-Q
I think Broli had in mind,just for a simple test,to wire an led. into the coil and spin the lot to see what happens.Hope he do'snt mind me answering.
peter

[exnihiloest]

...
For initial tests a brush and collector are not needed. One could wire a small light bulb on the rotor along the conductor to observe current flow.
...

Why do you think that when the magnet and conductors are spun together, a current will result?

The current results only from the Lorentz force on the charges which is F=q*v|B where v is the speed of the charge relative to the observer. A bulb on the rotor having a null speed relative to the conductors, no current can be expected. It is the same thing as the Faraday disk: brushes at rest are needed for a current to flow in the circuit.

[petersone]

Hi Ex
I think you are right,but I hope you are wrong.
peter

[broli]

Here's something you can think of. When I stand on a rotating plate I feel a centrifugal force even though the plate is not moving for me...hmmmm.You don't have to be outside the system to see the force. Maybe that's something einstein brainwashed us with? Apply ampere's old force law and see what you get...

http://www.rwgrayprojects.com/Lynn/ampdip/eq01.gif

And yes eventually you'll need a brush and collector to get the current out.

[TinselKoala]

TK that's the mistake people make. If the magnet is the conducting disk as well there is no way the force is caused by the current flow on the disk. Think about it this would violate newtons third law as the force and reaction force are glued together, so there can't be any net torque. The only thing that is causing a torque is the wire outside. There is not a single way you can approach the magnets that would not cause the torque. This is the law of electric currents.Trust me I know what I'm talking about.

I know you know what you're talking about, but I'm talking about actual experimental results, not necessarily their explanations. Are you familiar with Jeffrey Kooistra's work, that he did when he was Gene Mallove's technician/scientist, with Marinov and homopolar motors? He was able to show convincingly that there wasn't a back-reaction onto the brush leads in several configurations of Marinov and hp motors.
And there are multiple disk rotating homopolar generators that use only the axles for output current, and these axles are, well, axial to the magnetic field until well clear, so no relative rotation whether or not the field turns with the magnet.
I'm just sayin'... 
Have you read Tom Valone's Homopolar Handbook, which describes his own research and also collates a bunch of others? It's a fascinating read.
I agree with you about reaction. That's what makes it weird, or experimental error, or something. That's also why that Mylow fellow's motor can't be driven by the stators.