Aviation executives say the flight proves SAF can safely be dropped-in for jet fuel, while environmental campaigners say Virgin's world-first is greenwashing.
ADL says it has fine-tuned the mod package for the 737-800 to gain additional fuel burn savings after validating its technology during initial 737-700 trials.
Japan Airlines is working with startups H2Fly, Universal Hydrogen and ZeroAvia to explore the retrofit of its regional aircraft with zero-emission powertrains.
Under HyCAT, Hermeus says it will use its high-Mach-capable Quarterhorse vehicle to demonstrate key "enabling technologies for operational hypersonic aircraft."