Magnetic tape question

[Danielmutong]

Hi,

I’m interested in making the Maglev train (https://www.sciencebuddies.org/science- ... ain-weight).

I have bought magnetic tape but the magnetic sides attract each other so the train doesn’t float.

I should be looking for tape with only a single pole right? If so, are there any suggestions regarding where I can find single poled magnetic tape as online descriptions don’t seem to specify.

Thanks!

[RicaC]

Dear Danielmutong,

There is an article called "How to Make a Model of a Maglev Train" (https://sciencing.com/make-model-maglev ... 66032.html) from Sciencing that discusses in detail about the placement of the magnets onto the block and the track. Also, if you are a visual learner, there is a video that provides you with tips on the placement of the magnets (https://www.youtube.com/watch?time_cont ... SLMJCHhcEA). The most helpful part for you would start from the 5:20 mark.

No, you should have both poles on the magnetic tape. I think that the problem that you are facing is the placement of the magnets on the block of wood and track. I think that the article and video will be great for you to properly attach the magnets.

I hope this helps you. Please let me know if you are still stuck.

RicaC

[bfinio]

Hi Danielmutong,

Please see the FAQ section of our maglev train project, specifically the question "It looks like my train is attracted to the tracks instead of repelled. What is wrong?"

https://www.sciencebuddies.org/science- ... eight#help

It explains how you can use a strong neodymium magnet to re-polarize one of the magnetic strips. This will make the strips repel each other instead of attract, and then your train should float.

Please write back if you have more questions.

Ben

[Danielmutong]

Thanks for the replies.

What holding power for the magnet is needed if the "train" is 100 grams?

[bfinio]

Hi Danielmutong,

We haven't tried this with magnets of different strengths. In practice, the wooden block used for the train is so light that I don't think it should matter much. In theory, if you could find a rating for the magnetic tape (e.g. in pounds per inch of tape), you could calculate the amount of weight it could support since you know the length of the train. For example, I see magnetic tape on Amazon that says "can hold up to 5 pounds of flat, metallic surfaces per linear feet of length." which is way more than you need.

-Ben