>>11750835>exiting the tube at say 50,000 ft with just enough velocity to achieve orbit?At 50,000 feet orbital velocity is above 8 km/s, and in case you don't know, reentry vehicles need to stay above ~250,000 feet in order to not overheat from the plasma while moving at less than 8 km/s. You need to either exit the tube at a much lower velocity, or at a much higher altitude, probably both for a feasible vehicle design.
