STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[Airstriker]

htert2020 please go on with the zero back-EMF explanation. You seem to be quite gifted in explaining things Maybe something new will come to the ground. Anyway if you go on with no BEMF explanations please stick to the oryginal ORBO concept -> magnets facing the face of the toroid. Nobody except me has tried that before on this topic (at least I don't recall any more tries) and I wonder if we think the same way about this.

[happyfunball]

http://www.youtube.com/user/taramop

[maw2432]

@ htert2020

Thank you for your reply which obviously took much thought.
Yes please go on with your ideas and the ways you think Orbo could be replicated.

I am just a Science teacher in the public school system with only a general physics background.    I have been struggling with a replication attempt myself.   

I have spent a lot of time testing and finding a good rotor/wheel that could be used.    I think I finally found an acceptable rotor/wheel that may be used for a good replication attempt.  If you are interested in a replication attempt you could obtain this wheel without much trouble.  Good Ceramic bearings are also easy to get for this wheel.   I seem to learn the hard way ..... failure, failure, and more failure...... until I get it right.   

http://www.warehouseskateboards.com/product.asp?item=1WAEL061FW09781&class=1W&brand=AEL

I call this find a GreenOrb or "G-Orb" for short because of the bright green color of the wheels.  I think G-Orbs would make great test rotors, 

The ABEC 11 Flywheel is 97mm diam and about 52mm wide.  It is the first wheel with the width needed that I have tested (after many tested and much cost) that did not have any wobble. (A requirement that Steorn mentioned.)
As they say "you get what you pay for".   The ABEC 11 Flywheel uses two standard 608 bearings so Bones ceramic speed bearings are a good choice.   I tested many sets of bearings for spin down tests... as well as studied the reviews,  the Bones Reds ceramics are the best so far.    There are more expensive 608 bearings ... I hope to test later.  My spin down tests with a hard turn by hand is just over 3 minutes with one bearing and around 2 minutes with two bearings with the wheel on a 8 mm shaft.    With both bearings in the wheel,  I consider it rock solid with no wobble.   I will send a photo later. 

Bill   

 




Bill

   

[maw2432]

Here is a photo of the wheel. 

I will post a photo of my test rig later.    I think it makes a good test rotor.
Bill

[rice]

@htert2020

fortunately i do understand the technical mumbo jumbo.  the fact that there is very little or no back emf makes this thing super efficient,  but not O/U.  i am in no way trying to discourage anyone,  and i may be wrong,  but i feel people should see this whole orbo revolution for what it is.  energy efficiency at best!  i like your analogy but the part that needs correcting is that the orbo will not continue on through the wall.  it will indeed stop.  until the next pulse of energy which it is getting from a power supply.  back emf is not the only thing trying to stop a rotating magnetic field.