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Old 05-17-2009, 06:26 AM
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FanWriter45 FanWriter45 is offline
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Um... "Ion Drives" have been a staple in science fiction since at least the early 1930's. The basic idea behind the "electric rocket" is an old one that actually was first suggested (although not in it's current form) by Tesla at the turn of the century. We have actualy been using "ion thrusters" on satillites since shortly after TELSTAR, as ACS thrusters. Only in the late 1980's and early 1990's have this very old idea been used for actual propulsion in cometary probes like DS-1 or the lunar SMART probes.
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