https://www.dailymail.co.uk/sciencetech/article-10186369/The-future-satellite-launches-Startup-CATAPULTS-prototype-vehicle-space.html https://www.dailymail.co.u

https://www.dailymail.co.uk/sciencetech/article-10186369/The-future-satellite-launches-Startup-CATAPULTS-prototype-vehicle-space.html https://www.dailymail.co.uk/sciencetech/article-10186369/The... has some more info: "A 10ft-long projectile was rapidly accelerated to thousands of miles an hour in a rotating arm before being released for launch 'in less than a millisecond'. The first suborbital flight used about 20 per cent of the accelerator's full power capacity and reached a test altitude 'in the tens of thousands of feet,' Yaney said. The vehicle used did not have a rocket engine onboard but SpinLaunch does plan to add one, as well as other internal systems, in future test flights. "