Re: Crossover from GZGPedia List

"John M. Atkinson" wrote:
> Yeah.  But that covers how to get the rounds up.  We need them to come
> down again to hit something--a 200mm mass driver would achieve escape
> velocity!

	More.

	Orbital velocity is 5 mile per second.
	Escape velocity is 7 miles per second.

	Some existing prototype railguns
	can do 12 miles per second.
	Yikes!