Yes. Apologies. I will make an addition to my comment. I was only addressing sub-orbital flight, not orbital flight. The initial article was about the old NY-to-Tokyo in 2 hours thing we&#x27;ve been reading about for ages.<p>You cannot make orbit, but you should be able to go a long ways ballistically.<p>Add: A great way to learn about the energies involved is to create your own simulator in your programming language of choice. The ballstic&#x2F;orbital math isn&#x27;t that hard, and you don&#x27;t run into a huge number of problems just modeling how to get to orbit.<p>I did this many years ago, and concluded that for non-biological items, mass drivers win hands-down. Unless the magic of field propulsion finally happens, taking your own fuel along with you sucks.