(garfangle) writes:

I imagine the dimensions would be at least 500 meters long, 30 meters
in diameter, and require an explosive shot of several tons of tnt.

Now figure out what the acceleration would be along that 500 meters
of length in order to achieve orbital velocity, plus some extra to
make up for losses on ascent (e.g. air drag and the other usual
suspects). Have you squished your payload in the process of launching
it?

Jeff
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