Lafonte based generator.

[Airstriker]

I'm surprised. It's rare to see so much bullshit condensed in such a small paragraph, congratulations.

And this bullshit can be found exactly where if you can be precise ?

[Sprocket]

I was thinking about this and was wondering would use of the following ferrite rings be plausable;

http://cgi.ebay.com/Russian-M15BA-300-1k-Ferrite-Ring-100x50x9-mm-Lot-6-/250701996914?pt=LH_DefaultDomain_0&hash=item3a5f00e372

If so, first dumb question - is ferrite immune to eddy currents?  A think Butch mentions in his video that ceramic heated beyond it curie temp would be needed.  One obvious problem I see is the mechanical friction between the disks and the spinning magnets - maybe some nylon washers and lots of grease...

[broli]

I was thinking about this and was wondering would use of the following ferrite rings be plausable;

http://cgi.ebay.com/Russian-M15BA-300-1k-Ferrite-Ring-100x50x9-mm-Lot-6-/250701996914?pt=LH_DefaultDomain_0&hash=item3a5f00e372

If so, first dumb question - is ferrite immune to eddy currents?  A think Butch mentions in his video that ceramic heated beyond it curie temp would be needed.  One obvious problem I see is the mechanical friction between the disks and the spinning magnets - maybe some nylon washers and lots of grease...

The only reason why ferrite is mentioned is due to eddy currents. So yes it's immune because it's a bad conductor. The curie temp has little relevance imo. As for friction, obviously you want a very small air gap between rotor and stator. This might have small disadvantages but the advantages far outweigh a design with no air gap and maximum friction.

[Sprocket]

I know it's supposed to be an air-gap, and not such a problem with those huge magnets Bruce was playing with.  The reason I posted a link to the ferrite rings was for feedback on the feasibility of scaling it down to using much smaller magnets - the outside diameter of these rings are just 10cm, so we're talking much smaller magnets, therefore the air-gap would have to be correspondingly smaller than the 1mm cited by Bruce to redirect a useful amount of flux.  I would have problems with the 1mm not to mind smaller spacings, hence the washer & grease notion...

Good to know about the eddy currents though or lack thereof, I have no unmagnetised ferrite rings that I could have spun up and checked for myself.  I might just order a few of those rings and have a play with the idea.  It makes sense and I'd love to see something that generated power without also generating back-torque when loaded.

[Sprocket]

I was also thinking, what if you replaced both disks as above with ferrite E-cores, 1 above, 1 below each magnet-pair, therefore 4 E-cores for the above set-up.  That way you could wind your pick-up coils on the E-cores themselves, tapping both the main flux path as well as the secondary one.

Or do you need a 'continuous' flux path (ferrite all the way round) to produce the 'Bruce Effect'?  Maybe 'fat' E-cores??  Just musing...