Scotland has released $12 million in funding to back ZeroAvia's Hydrogen Propulsion Manufacturing Site, showcasing a commitment to hydrogen technology. XTI has named powertrain partners to facilitate the integration of turboshaft engines for the TriFan 600 VTOL aircraft, a step towards advancing propulsion systems. Rolls-Royce's Pearl 10X engine has successfully completed the most major certification tests, reflecting the company's continuous development efforts. Additionally, collaborations between companies like XTI and VerdeGo aim to explore hybrid-electric propulsion options for VTOL aircraft, showing progress in sustainable aviation solutions. Ampaire has achieved FAA G-1 certification for its hybrid-electric propulsion system, demonstrating regulatory approval for innovative aircraft powertrains. Moreover, a cargo operator plans to operate a hydrogen-powered Caravan aircraft, further highlighting the industry's shift towards cleaner energy sources. Vertical's announcement of a longer-range hybrid-electric VTOL aircraft and Kawasaki's aero engine design inspired by motorcycle principles reflect ongoing advancements in aviation technology.