ZeroAvia has flown a 19-seat Dornier 228 twin-engine aircraft as a testbed for its full-sized hydrogen fuel cell engine (writes Nick Flaherty). The aircraft was retrofitted to incorporate ZeroAvia’s ZA-600 600 kW hydrogen-electric engine on its left wing, which ran alongside a single Honeywell TPE-331 stock engine on the right. The hydrogen-electric powertrain has two […] More…