Ad Astra Rocket Company (Ad Astra ... NextSTEP contract with the goal of demonstrating a steady-state, 100-kW engine at a Technology Readiness Level of 5. In July 2021, the VX-200SS™ operated ...

One with a long track record is the Ad Astra Rocket Company ... They have to keep pushing—like the engines they hope to fly someday. Provided by Universe Today ...