How long do I have before the liquid nitrogen boils away?

Question

If I were to theoretically create a a personal glider that fits on a person like a flying squirrel suit, this suit would have the special property of never losing height. This can be achieved by replacing the ground with a giant magnet and placing superconductor disks inside of the suits wings. (This is quantum physics, how this works isn't an issue right now). My problem is that the disks need to be supercooled and liquid nitrogen would be my best option. So, if I had LN2 pumping through the suit, how long do I have until the nitrogen boils off? Basically, how long would someone have to fly?

Answer 1

It's purely down to how good the thermal insulation is around the liquid nitrogen container.



It boils off due to heat ingress; if you can get that to near zero with multiple layers of insulation, it should last a long time.

Answer 2

Aside from all the other nonsense, it will depend upon what the liquid nitrogen is stored in, that is, how good an insulator it is. I have found that about half the liquid nitrogen placed in a Dewar flask (open at the top) in the morning will be left in the Dewar at about 3 in the afternoon, assuming none was removed.

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Answer 3

Liquid N2 is not the fun stuff you think it is. Its is dangerous.