Today's announcement of a "refined concept for its light jet," included multiple technical advances. They include a new electric power train with 90 percent fewer moving parts than the previous design. This clean-sheet design will cut operational costs by more than half.

Beyond Aero wants to certify its hydrogen-powered business jet by 2030, but that's a very ambitious schedule.

Other changes include a redundant system consisting of two electric engines powered by independent fuel cell systems with a larger, 2.4MW capacity. For safety, the liquid-hydrogen fuel tank is now above the wing box to eliminate high-pressure fuel lines inside the cabin. The system also includes a new thermal management system with electric ducted fans and enhanced digital engine controls for all flight phases.