Replication of the Jan P. Cack device?

[Omnibus]

@All,

Does anyone remeber a guy who was selling plans for a similar magnet motor on ebay? See attached.


O.S. The craftsmanship of the two motors in progress here is impressive. Wish you best of luck.

[gyulasun]

Hi mikestocks2006,

Well, you may be right... I cannot tell for sure.  Nevertheless the rotor strangely decelerates between 00:05 and 00:07 seconds and during this the four rectangular blocks (in which the magnets are) at the ends of rotor arms rotate also strangely as if they were lagging behind, as if the interconnecting bands/strings were slippy during that time...  then suddenly the rotor speeds up.
I wonder what causes these fluctuations?  I would expect a relatively gradual and continuous acceleration all the time till reaching full speed.

Yes it is a good idea to invite the builder, dadido3 to this forum.

rgds, Gyula

[Omnibus]

Hi mikestocks2006,

Well, you may be right... I cannot tell for sure.  Nevertheless the rotor strangely decelerates between 00:05 and 00:07 seconds and during this the four rectangular blocks (in which the magnets are) at the ends of rotor arms rotate also strangely as if they were lagging behind, as if the interconnecting bands/strings were slippy during that time...  then suddenly the rotor speeds up.
I wonder what causes these fluctuations?  I would expect a relatively gradual and continuous acceleration all the time till reaching full speed.

Yes it is a good idea to invite the builder, dadido3 to this forum.

rgds, Gyula

Similar fluctuations are seen in @xpenzif's video. These are due to the imperfections of the fields and they are more in favor than not of these devices being real.

[mikestocks2006]

Hi mikestocks2006,

Well, you may be right... I cannot tell for sure.  Nevertheless the rotor strangely decelerates between 00:05 and 00:07 seconds and during this the four rectangular blocks (in which the magnets are) at the ends of rotor arms rotate also strangely as if they were lagging behind, as if the interconnecting bands/strings were slippy during that time...  then suddenly the rotor speeds up.
I wonder what causes these fluctuations?  I would expect a relatively gradual and continuous acceleration all the time till reaching full speed.

Yes it is a good idea to invite the builder, dadido3 to this forum.

rgds, Gyula

Hi Gyula,
Yes, I?ve noticed that too, however, an initial deceleration (or a series of them) can be explained, as the rotor revs up:
Assuming this is real, and due to the number of magnets involved, (as high as 16) there is a continuously changing composite field interaction as the center assembly rotates.
There is also a composite so called ?sticky spot? and as the assembly reaches the point of max ?stickiness? it is expected to decelerate, and as it manages to pass it, it should accelerate and so on. As long as the net effect is positive gain it should cycle up to the point of max air resistance and to the max ability of the magnetic field interactions to catch up due to lag effects.
Ofc this is one speculative explanation based on the limited visual information from that one video. Surely there can be others.

I?ve visited the local ToysRUs store, they do carry a Lego line but nothing with the bricks including  magnets as it apparently shown in the video. Even their MindStorm kits here don?t seem to have these magnet blocks. (they do have the pullies though). This set up should be easy to build, and see if it performs if the identical proper parts can be had.

Yep, any input from dadido3, especially on the blocks containing magnets, and the bands used, flexible vs inflexible etc would be helpful.

Thanks

[Omnibus]

Hi mikestocks2006,

Well, you may be right... I cannot tell for sure.  Nevertheless the rotor strangely decelerates between 00:05 and 00:07 seconds and during this the four rectangular blocks (in which the magnets are) at the ends of rotor arms rotate also strangely as if they were lagging behind, as if the interconnecting bands/strings were slippy during that time...  then suddenly the rotor speeds up.
I wonder what causes these fluctuations?  I would expect a relatively gradual and continuous acceleration all the time till reaching full speed.

Yes it is a good idea to invite the builder, dadido3 to this forum.

rgds, Gyula

Hi Gyula,
Yes, I?ve noticed that too, however, an initial deceleration (or a series of them) can be explained, as the rotor revs up:
Assuming this is real, and due to the number of magnets involved, (as high as 16) there is a continuously changing composite field interaction as the center assembly rotates.
There is also a composite so called ?sticky spot? and as the assembly reaches the point of max ?stickiness? it is expected to decelerate, and as it manages to pass it, it should accelerate and so on. As long as the net effect is positive gain it should cycle up to the point of max air resistance and to the max ability of the magnetic field interactions to catch up due to lag effects.
Ofc this is one speculative explanation based on the limited visual information from that one video. Surely there can be others.

I?ve visited the local ToysRUs store, they do carry a Lego line but nothing with the bricks including  magnets as it apparently shown in the video. Even their MindStorm kits here don?t seem to have these magnet blocks. (they do have the pullies though). This set up should be easy to build, and see if it performs if the identical proper parts can be had.

Yep, any input from dadido3, especially on the blocks containing magnets, and the bands used, flexible vs inflexible etc would be helpful.

Thanks

See, I don't expect the lego setup would include every detail we see in the video. The magnets are supplied separately, I guess. Of course, @dodido3's would be much appreciated but maybe he doesn't even know of this discussion group. Will try to send him a pm via youtube.