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Thanks ;) I think the answer is simple - it depends on the spacecraft ;D

Does such system and spacecraft exist?

This is my vision of the future, but I'm sure you can already build a system which works similarly to one I wrote about. About spacecraft (you mean spacecraft to travel from one place on Earth to other?) - it is just an Elon Musk's idea, but I'm sure it is doable and he will at least try to make it ;)

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