Added: 2 years ago
From: rockytube
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  • would it be 100% frictionless if its in a vacuum?

  • Very well done, but don't forget the friction from the air around it. A vacuum would be a nice addition, if you have the means!

  • you will like this. (though weight for momentum is preferred in a moving system) Maybe use a winding or coil that has electricity flowing to make the Stabilizing field. wrapin' wire around the cd tower, instead of all those magnets

  • Very nice work; you've taken a great idea, and have a neat apparatus. The system looks a little unstable, but I suppose that is due to the PVC being cut unevenly. Have you made any modifications since this video?

  • @shawnki91 : I believe the instability you are referring to is due to a balancing problem in the outer cylinder. Remember, this is only an early prototype made from parts I had laying around my house.

  • @rockytube The instability doesn't look like a manufacturing problem. Magnetic bearings of this type are ALWAYS unstable - it is impossible to make them stable (due to the nature of magnetic fields - this can be proven mathematically). You can get 2 axes stable (i.e. you can get height stable, and left-right) but the 3rd must always be unstable.

    The only way to do it is to use a mechanical bearing in the 3rd direction, or use an automatic control system (e.g. electornics + electromagnet).

  • Even if you get rid of mechanical friction by using vacuum, there will be magnetic drag. It wont spin forever, IMHO.

  • @630MillionGods: Of course, anything spinning is going to have drag if it's not in a vacuum, so I'm not worried about that. I'm just trying to get the bearing systems to be frictionless. Magnetic fields attract, or repel. But repelling fields, one field riding on the other, have NO friction. Take two strong magnets with like pole facing each other and try to push them together. It's very hard to keep them lined up.

  • nice work!!! i like it.

  • Thank you!

  • You must encapsulate the whole system in a vacuum so that it is not affected bye air-drag! Looking forward to follow your great experiments!

  • I'm not really worried about the external friction of whatever is spinning. My #1 goal at this point is get the bearing system 100% frictionless.

    But you are correct. For the whole thing to be frictionless, it would have to be spinning in a vacuum. Which should not be too hard to do. And would still work as a Bedini motor. Except the coils will be a little farther away then they would be if it wasn't encapsulated.

  • Thank you. That's a great idea. But I'd like to get the bearing 100% frictionless first. Any ideas on how to do that?

  • Even if you get rid of mechanical friction by using vacuum, there will be magnetic drag. It wont spin forever, IMHO.

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