I'll second that.
I would think a 3" ferrite toroid with a center mounted CPU fan motor turning the armature would be more than adequate to prove the concept. And quite potentially, if running at higher RPMs and using ferrite, could still produce 10-20 watts of useable output.
@Matt Watts
The CPU fan will die right away.
@gotoluc
Saw the other vids. Was not surprised by the result.
Question: What is the difference in the gap between the primary core and the rotor core that would give an effect or not give an effect. Or asked another way, what I to E core gap would be required to move from zero to full effect?
If the distance between this is not that great, maybe I can suggest using a solenoid to push the I core in and out instead of rotating the core. The solenoid action would place the complete I core in the maximum reaction range instantly instead of having it sweep across in a rotation. If you bring the I core close to the E core manually, can you see a spike on the scope? hehehe
The solenoid I have in mind is one that can be used right off a chemical dosage pump model Pulsatron Series C. I am attaching a pdf on the dosage pump, page 12, it is housed in #50 that is secured to the main body mounting base #51.
You should be able to find a used or even a broken one from any local water treatment company either for free or a few bucks. WT guys should have a good number of these is their junk you-never-know bin. I have a few at my water treatment company. In most cases the pulse circuit is blown (usually a very small component is shot, but the solenoid is still OK). May require a little oil in the shaft if it makes a high pitched noise. You can keep the pump mounting intact as it already has the solenoid well secured in a vertical position.
Are you still in Ottawa cause I can send you one if you are interested.
If there is an effect with short advancement, the idea of using a solenoid is a good option since there is also the potential to recycle the pulse energy used for the solenoid. You should be getting back some good flyback. Since the I core approach would then stop before it backs away, this would work like a pump where with the right diode and capacitor on the primary MOT would unload the primary coil as output at each pulse so the primary + e core would never act as an electromagnet as it always does when you get motor drag.
Anyways, you can always PM me if you are interested and let me know where to send it.
Always looking for ways to play.
@ION
Certain things require a minimal effort. Even if you did it small scale, you will still have to do all the R&D. Find the right motor, the right mounting, the right MOT analog, the right RPM, the right load, etc. Big or small, will not diminish the level of attention. At least in the bigger scale you already answered the question "Is it scalable".
wattsup
PS: @gotoluc, if you ever try this maybe consider winding a coil around the edge of the I core as well and check that output. Every watt counts.