"Mag Train" unipolar dynamo projectile of Igor Moroz.

[synchro1]

Igor shoots a battery through a copper coil at 2:45 in this video with disk magnets on each end:

https://www.youtube.com/watch?v=mEg3S1oP8bY&list=PLC7684829E98CAD74

Quote from Igor:

"it's not mine, i'm just answering question how does it work; because it's still unipolar dynamo, but in other configuration"!

He mentions a circular track. There's really nothing to stop it from accelerating. Dipping a large circular coil in an epoxy bath and attacing lateral roller bearings to the battery would allow for high speed under evacuation. Maybe a new "Hyper-Loop" configuration?

[TinselKoala]

You win the prize for constant misrepresentation. Although in this case, IF you are correctly stating what Moroz claims, you both are wrong. There is nothing "unipolar dynamo" about the battery-magnet-coil system shown. This thing was first analyzed here and elsewhere weeks ago when Theoria Apophasis posted a ripped-off video on his YT channel without attribution or credit to the original poster. It is nothing more than a solenoid, with power supplied from the inside rather than from the outside, and the battery-magnet combination is the solenoid plunger. Some people--- Wheeler for one--- even speculated it would work with insulated wire, which is just silly.
Here's the original, or at least the earliest version I can find:
http://www.youtube.com/watch?v=J9b0J29OzAU
When I first saw it weeks ago I thought it might be a homopolar motor too, but then I thought about it a little more and realized it was just a weird solenoid. The magnets make the sliding connection with the parts of the coil that are wrapped around the battery. The magnetic field in this segment of the coil pulls/pushes the battery-magnet structure through the solenoid. The "active" region of the coil moves along with the battery-magnet. The coil itself is pushed backwards while the battery-magnet structure is pushed forward. It is a solenoid bent in a loop, with the  plunger carrying the power supply along and the magnets acting as "brushes" making contact with the bare wire. Any rotation of the plunger is just an artifact of the helicity of the coil of wire and frictional contact with the plunger. It's not a "unipolar dynamo" in any sense of the term.

If you made a full circle out of it and put in some engineering effort, it would indeed go very fast, accelerating to the point where frictional and magnetic losses offset the driving force from the solenoid action. And when the battery ran down it would slow and stop. Further down in the comments you can see where Moroz correctly states that generator coils around the outside would add further drag to the thing.

Now this one is slightly more interesting:
http://www.youtube.com/watch?v=5Z9v7j6Q6jc

I demonstrated such a design using a pool of mercury instead of a rolling bearing fifteen years ago, before YT or highspeed internet.

There are now dozens of versions of the "simplest electric train" on YT.

http://www.youtube.com/watch?v=wcYGKyDHJT0

[synchro1]

You win the prize for constant misrepresentation. Although in this case, IF you are correctly stating what Moroz claims, you both are wrong. There is nothing "unipolar dynamo" about the battery-magnet-coil system shown. This thing was first analyzed here and elsewhere weeks ago when Theoria Apophasis posted a ripped-off video on his YT channel without attribution or credit to the original poster. It is nothing more than a solenoid, with power supplied from the inside rather than from the outside, and the battery-magnet combination is the solenoid plunger. Some people--- Wheeler for one--- even speculated it would work with insulated wire, which is just silly.
Here's the original, or at least the earliest version I can find:
http://www.youtube.com/watch?v=J9b0J29OzAU
When I first saw it weeks ago I thought it might be a homopolar motor too, but then I thought about it a little more and realized it was just a weird solenoid. The magnets make the sliding connection with the parts of the coil that are wrapped around the battery. The magnetic field in this segment of the coil pulls/pushes the battery-magnet structure through the solenoid. The "active" region of the coil moves along with the battery-magnet. The coil itself is pushed backwards while the battery-magnet structure is pushed forward. It is a solenoid bent in a loop, with the  plunger carrying the power supply along and the magnets acting as "brushes" making contact with the bare wire. Any rotation of the plunger is just an artifact of the helicity of the coil of wire and frictional contact with the plunger. It's not a "unipolar dynamo" in any sense of the term.

If you made a full circle out of it and put in some engineering effort, it would indeed go very fast, accelerating to the point where frictional and magnetic losses offset the driving force from the solenoid action. And when the battery ran down it would slow and stop. Further down in the comments you can see where Moroz correctly states that generator coils around the outside would add further drag to the thing.

Now this one is slightly more interesting:
http://www.youtube.com/watch?v=5Z9v7j6Q6jc

I demonstrated such a design using a pool of mercury instead of a rolling bearing fifteen years ago, before YT or highspeed internet.

There are now dozens of versions of the "simplest electric train" on YT.

http://www.youtube.com/watch?v=wcYGKyDHJT0

@TinselKoala,

Thanks for the links. I uploaded a picture of a state of the art "Trash Picker" tool to return your favor. Feast your eyes on this beauty:  This one will allow you to "Dive Deep" into those hard  to reach dumpster corners.