orbital tether electric motor

[William Beaty <billb@ESKIMO.COM>]

Very cool, check it out:

  ProSEDS tether electrodynamics
  http://astp.msfc.nasa.gov/proseds/

Doesn't this violate Conservation of Momentum, etc?  For there to be a
current, there has to be a large ion flow from the tips of the tether.
Maybe we should view this device as an ion engine, not as an electric
motor which pushes on the Earth's magnet dipole.

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William J. Beaty                                  SCIENCE HOBBYIST website
billb@eskimo.com                                  http://www.amasci.com
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