Boeing and Aerojet Rocketdyne have successfully completed ten engine firings in ten days of an rocket engine originally designed for the space shuttle and now being recycled as part of Boeing’s Phantom Express reusable rocket being built for DARPA.
I honestly am not that excited by this. The Merlin engine has been able to do some variation of this now for a half decade. Firing an engine repeatedly is required to get satellites into geosynchronous orbit. This really isn’t news.
Nonetheless, it will be news if they can get this engine installed in a rocket that they actually fly to orbit ten times in ten days.