Heh, this is a really fun idea, actually, ridiculous, but fun. It would probably be quite inefficient, since you need a high enough speed to be worth it since

Heh, this is a really fun idea, actually, ridiculous, but fun. It would probably be quite inefficient, since you need a high enough speed to be worth it since the trajectory is ballistic. The higher the speed needed to get where you want, the greater the energy losses, since air friction does not scale linearly with speed, but exponentially. This is the reason I think it would be inefficient energy-wise. I actually like the Hyperoop model for transportaion the best, since the my understanding you would have the least energy losses.