Hydrogen-powered spy robot flies at 12,000 feet to vanish from radars

Zepher Flight Labs (ZFL), a Washington-based company, has achieved a significant milestone with its Z1 hydrogen-powered vertical takeoff and landing (VTOL) unmanned aerial vehicle (UAV). The Group II drone successfully ascended to 12,000 feet at maximum takeoff weight during a test simulating real intelligence, surveillance, and reconnaissance (ISR) missions, setting a new record for its testing capabilities. The Z1 demonstrated stable flight dynamics, full power operation, and system integrity at high altitude. Designed for over 10 hours of flight endurance, the Z1 supports diverse missions including surveillance, disaster relief, and supply transport, benefiting from hydrogen propulsion that offers acoustic and thermal stealth, zero emissions, and sustained loitering in challenging environments. The Z1 can reach altitudes up to 20,000 feet, surpassing typical Group II drone capabilities, and its vertical launch and hydrogen fuel system make it suitable for operations in areas lacking runways or reliable fuel sources. This