Copenhagen Suborbitals: Make Their 1st NEW Rocket Fuel Injector! 3D Printed BPM-5 Coaxial Swirl Injector
https://copenhagensuborbitals.com/making-our-1st-new-rocket-fuel-injector-3d-printed-bpm-5-coaxial-swirl-injector/
Gilmour Space Technologies: successfully tests 90kN hybrid rocket
https://ia.acs.org.au/article/2021/aussie-rocket-startup-prepares-for-launch.html