[eadt]

Hi there! I'm actually 17 years old and I'm starting my final project for High School. I'm pretending to investigate everything about Levitating trains and make some experiments about them.
I know it may sound difficult but I'm so convinced the experiment I'll make is a Levitating train scale model, though I've several questions and doubts.
At first my idea is to make something similar to this:

http://www.youtube.com/watch?v=59D4AIxTL-A

So, I know that I'll need many magnets, a superconductor material and Nitrogen Liquid. None of them are a problem, I'm buying 200 magnets on Monday, i'll buy the superconductor from a Czech Republic company (40$ + shipment), and Nitrogen Liquid is quite cheap here in Spain.

1- The problems start with the magnets. I'll be using magnets of 10mm (width) * 2 mm (height) * 20mm (depth), like the one you can see in the image:


It looks like most videos about superconducting trains I've seen, use magnets of about.. 5 mm height, and I'll be using 2mm height magnets.. so I don't know if that will be enough to levitate the train. In magnet's seller webpage I can read each magnet is able to handle approximately 2Kg, and I'll be using 3 rows of magnets, so 3*2= 6kg max weight for the train. I don't think my train will exceed 0,6Kg.. but I've to ask anyway, can I trust that values?

2- Ok, If magnets are powerful enough I go straight to the superconductor. I don't have much money to spend, so I'm buying a cheap one. http://www.imagesco.com/catalog/SuperConductor/SuperConductor.html Here I've 2 nice options, 1 option is a rugged 1" YBa2Cu3O7 superconductor disk (49$) and the other is 6$ more expensive, and is a rugged disk made of bismuth (Bi2Sr2CaCu2O9), which claims to be even more powerful, though I haven't seen many reviews or videos about it. So what would you recommend me? Ydrium, or Bismuth? Will a 1 inch superconductor disk, make a 06 weight object levitate?

3-Nitrogen Liquid is quite cheap all over the world, about what I can get it from less than 5$/L, so buying it is not a problem, anyway, How the hell can I store it? I don't pretend to store it for a long time, max 10 days. But what about traditional freezer + a classic termo (I mean, nothing of cryogenic or so), is there any cheap option? I just don't want to waste 500$ in a 5 litres container..

I'd be really grateful if you could answer me some of that 3 questions! Thanks in advance and sorry for my bad english.

[skyjumper]

as for the Nitrogen, I know my supplier lets me rent a storage device for it. Ask whoever you use, they probably can cut you a deal.

[silenceisgod]

A thermos with a small hole in it, wrapped in an emergency blanket, in Styrofoam and in the freezer should hold for a few days.

[eadt]

Thank you both! So third problem seems to be fixed, what about the magnets, do you think they'll be powerful enough?
Greetings!

[skyjumper]

http://www.youtube.com/watch?v=1zwBoBbHR4I&feature=related

In that video he uses magnet quite similar to yours

starts at 4mins