On the fast track: Stratolaunch says its rocket engine preburner has hit full power

Chalk up another milestone for Stratolaunch Systems’ rocket engine development effort: The Seattle-based space company founded by late Microsoft co-founder Paul Allen says it ramped up the preburner for its PGA rocket engine to full power this week during hot-fire tests. Stratolaunch’s 3D-printed preburner, a key component that typically begins a rocket engine’s combustion process, had its first hot firing less than a month ago at NASA’s Stennis Space Center in Mississippi. And just a year ago, the hardware was merely a twinkle in the eye of Stratolaunch’s engineers. “Per public records, this is the fastest preburner development in U.S.… Read More