[danthewireman]

This looks fantastic if it'd work, but I wonder if it'd be more useful to build in space, and then use it to launch little probes. No atmospheric drag.

I realize building it in space would be a good bit harder than on the ground. I'm just in wouldn't-it-be-cool land.

[DanBC]

Build it on the ground, and use that ground based version to sling up the moon based version, and use that to sling out the stuff for the Mars colony?