The amount of sense this makes is unbelievable. 
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Circular mmmnn.. Creo que elíptico seria mejor
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Then all access points to the airport would need to be underground?
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It would have to have a huge radius to compensate for centrifugal force. Not such a great idea in emergencies manoeuvring, I think
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'.. We can keep on optimizing the system.. but at a certain moment, small steps don't work anymore..'
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