This is super cool technology that will probably work given enough time, but I struggle to see the world in which it would be more economical than other terrest

This is super cool technology that will probably work given enough time, but I struggle to see the world in which it would be more economical than other terrestrial launch options. The tech could really shine in bulk material shipments outside of the atmosphere. Given the vacuum requirement it is already mostly designed to support that. The unfortunate part is that number of existing ventures it could be applied off-world is precisely zero at the moment. Why outside of atmosphere? Launching from Earth poses some pretty hardcore requirements: * Total system needs to achieve at least 7.2km/s. * 7.2km/s initial velocity is not practical because of extreme atmospheric friction, heating, and vibration. You would need 9+km/s to escape atmosphere anyhow because of drag. * You need a second stage which is heavy compared to payloads you want to launch, making the device capable to spinning a heavy second stage is challenging. * Ideally you want your second stage to be as light as possible, which means less delta-V, which requires high `first-stage` spin speeds, which requires the launch device to be operated in the vacuum and second stage capable of withstanding lots of G forces. Looking at off world applications, such as bulk launching materials from Moon, Mars, or asteroid belt, all of the above hard requirements are not there anymore. Escape velocity much lower, second stage is replaced with comparatively tiny terminal guidance stage or is significantly less massive, you have vacuum so no seals or atmospheric drag heating... To summarize, I believe terrestrial economics will be quite iffy, but off world bulk material launches could workout (if the company survives till the point when the capability is needed).