Not new, was Re: Is this a new cheap way to get material into space?

From: Michael M. Butler (
Date: Thu Mar 01 2001 - 22:47:51 MST

> Hmm...if you could make the mass driver and power supply light enough
> (a significant challenge, no doubt),
> what about doing the reverse?
> Standard Idea Question: So, what obvious fallacy am I missing in the
> above? ^_^;

None. Bear in mind that if you are trying to move an entire asteroid and
are not in a hurry, mass drivers ought to work well, and the weight is
not as much of a concern.

Both mass drivers as propulsion and mass drivers as raw materials
transport have been in the literature for something like two decades, at
least. They seem to work well, if energy is cheap.

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