| But the friction on the axle takes away energy and the wind risistance also does this. To circumvent the air risstance you
would have to build a near perfect vacumm chamber because if there is no air there cannot be any air risistance. Friction however is a much harder
problem to deal with. Currently the best way to eliminate friction is to use
magnetic suspension but magnets eventually get demagnatized.
In the second paragraph of this article about permanent magnets
it says you would have to take a steel bar hold it verticaly and strike the end
of the bar doing this creates a permanent magnet that could be used to remagnatize new other magnets within the machine. |
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