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I can't imagine a 47 foot wide track. of course, I can't imagine this space Elivator nasa has proposed to replace shuttles with. one big question. nnot only would air resistance add to the amount of fuel cost, but the fact that a much bigger unit with a much heavier load add to even more fuel usage. this would not help the enviroment. one nice thing about 4' 8.5" is its flexability too. you could build a line this guage almost anywhere. <br /> <br />And also to point out. slabs of metal on ties or rocks that parralleled them WERE rail in the 1800s, why go back to an old type of rail, if it was proven not as viable?
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