Re: Gun launched orbital systems

From: Spike Jones (
Date: Mon Oct 22 2001 - 21:31:44 MDT

Adrian Tymes wrote:

> ...One could imagine RC maintenance bots, drifting from solar sat to solar
> sat, skimming reaction mass from the atmosphere for ion engines powered
> by its own PV system...

The breakeven point for a system skimming reaction mass from
the upper atmosphere would require exhaust velocities in excess
of 8km/sec. This is at the limit of current space based ion engines.
Perhaps Doug will comment on this. spike

This archive was generated by hypermail 2b30 : Sat May 11 2002 - 17:44:15 MDT