U.S. startup Astro Mechanica plans to take its hybrid-electric supersonic engine into high-altitude and high-speed ground testing this year as it moves toward flying the unique powerplant in 2027 in a ...
GE Aerospace recently started test running the Passport-turbofan-based hybrid-electric propulsion system it developed under NASA’s Hybrid Thermally Efficient Core (HyTEC) programme, one of several ...