There's an interesting startup called SpinLaunch[1] which is "working on mass accelerator technology to move payloads to space." "At Spaceport America in New M

There's an interesting startup called SpinLaunch[1] which is "working on mass accelerator technology to move payloads to space." "At Spaceport America in New Mexico on 22 October 2021, SpinLaunch conducted the first vertical test of their accelerator at 20% of its full power capacity, hurling a 10-foot (3.0 m) long passive projectile to an altitude of "tens of thousands of feet". This test accelerator is 108 ft (33 m) in diameter, which makes it a one-third scale of the operational system that is being designed." [1] - https://en.wikipedia.org/wiki/SpinLaunch https://en.wikipedia.org/wiki/SpinLaunch