It looks like I won't find a final diagram( showing the magnetic poles ) for the  'Nikolayev trailer-hitch,  as used in    https://www.youtube.com/watch?v=mmdSSMoUT4g

TinselKoala   

QuoteThe key to success is using spacers properly between the sandwiched magnets.

    But the video below,  a novelty-toy version of the  'Nikolayev trailer-hitch' ,   shows a different method of doing this   (  it's obvious that there's multiple ways to achieve this effect )

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

        It would be great if you could tell me if my diagram in my   'Reply #5' ,  is correct for the video below

      https://www.youtube.com/watch?v=mmdSSMoUT4g   

    I assume you'll be too busy to reply  (  so I won't bother pasting my earlier reply,  where I suggested that maybe one of the  'surprising results you got' by using pulsed-current( instead of continuous current )  in a device related to this,  may have been due to an 'electrical-transformer' effect  )

Quote from: forumblog on September 10, 2015, 04:30:23 PM
It looks like I won't find a final diagram( showing the magnetic poles ) for the  'Nikolayev trailer-hitch,  as used in    https://www.youtube.com/watch?v=mmdSSMoUT4g

TinselKoala   
    But the video below,  a novelty-toy version of the  'Nikolayev trailer-hitch' ,   shows a different method of doing this   (  it's obvious that there's multiple ways to achieve this effect )

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

        It would be great if you could tell me if my diagram in my   'Reply #5' ,  is correct for the video below

      https://www.youtube.com/watch?v=mmdSSMoUT4g   

No #5 is wrong but your diagram is correct.
5 would require remagnetising the magnets... and would not demonstrate any attraction properties.

Just like the 'novelty toy' video.  Poles are vertical to the table. 

You seem to be right

(   the only thing that had made me question what have said,  is the way that the magnetic-poles are demonstrated at the start of the video   https://www.youtube.com/watch?v=mmdSSMoUT4g ,  that toy-car  does seem different to the other  toy-car  video  ,   but,   your answer could easily also be correct for this video  )

(  I accept you answer as being 100% correct for  https://www.youtube.com/watch?v=dtiMQPeYJrQ    and    http://www.youtube.com/watch?v=LyvfDzRLsiU   )

-  I am now finnished with this topic

By the way,  another video by that novelty-toy maker  https://www.youtube.com/watch?v=oNRDvDIqD1M  ,   I think that if you you used a much larger grid in that video,   and then put a large-flat-magnet-sled  on the grid,  to levitate above the grid,  that it would levitate successfully,   and  if you put side magnets to keep the sled from  falling out of the grid,   then it would  break  'Earnshaw's Theorem'(  'Earnshaw's Theorem'  states that magnetic levitation using only permanent-magnets,  is impossible,  and has never been done )

I don't want to waste any more time posting in this forum,  it really is mostly a waste of time

Quote from: forumblog on September 10, 2015, 10:00:38 PM

I don't want to waste any more time posting in this forum,  it really is mostly a waste of time

Then go.

... and next time you write a subject to a thread, get your spelling right if you want to attract the most useful attention.