Abstract eVTOLs are receiving a lot of attention as potential solution to urban air mobility challenges. Many configurations multirotors, which open loop unstable, therefore very susceptible actuator failures. Due their usually short mission duration (20-30 min), fault-tolerance the propulsion system is greater importance then reliability. Thus, novel approaches enhance this capability required...

The Double Asteroid Redirection Test (DART) spacecraft was developed to provide the first measurement for orbital deflection of an asteroid upon intentional impact. NEXT ion engine is part mission, on its maiden voyage. As pre-launch risk reduction, erosion characteristics extraction grid system were evaluated using laser measurements sputtered molybdenum atoms over envelope potential throttle ...