Maybe about 1.7km/s at 75km apogee [0] for a low earth orbit of around 7-8km/s at 200km. Then a regular(ish) rocket housed inside the centrifuge launch vehicle

Maybe about 1.7km/s at 75km apogee [0] for a low earth orbit of around 7-8km/s at 200km. Then a regular(ish) rocket housed inside the centrifuge launch vehicle would separate and make up the rest. 0: https://twitter.com/DJSnM/status/1458467841779253253 https://twitter.com/DJSnM/status/1458467841779253253