Scotland has taken a significant step towards advancing hydrogen propulsion in aviation by releasing $12 million in funding to support ZeroAvia’s Hydrogen Center of Excellence. Rolls-Royce's Pearl 10X engine has recently completed major certification tests, indicating progress in the hydrogen propulsion sector. Additionally, companies like XTI and VerdeGo are collaborating on hybrid-electric propulsion systems, exploring applications for VTOL aircraft like the TriFan 600. Ampaire has achieved FAA G-1 certification for its hybrid-electric powertrain, setting a milestone in the integration of such systems in aircraft. Moreover, a cargo operator is planning to lease a hydrogen-powered Caravan aircraft, demonstrating the industry's shift towards sustainable solutions. Vertical is also working on a longer-range hybrid-electric VTOL aircraft, showing the potential for advancements in electric propulsion technology. Kawasaki's innovative aero engine design, drawing from motorcycle expertise, indicates a cross-industry application of engineering principles. Finally, Wright is expanding its electric propulsion system tests, highlighting the ongoing developments in eco-friendly aviation technologies.