ZEROe Airbus, taking a new direction, announced that they are, “Exploring game-changing concept aircraft – known as ZEROe – powered by hydrogen, a disruptive zero-emission technology with the potential to reduce aircraft emissions by up to 50%.” Two seem to be evolutionary, employing a different fuel and powertrain within fairly conventional airframes. The third, a blended-wing body (BWB) structure, emulates Boeing’s and NASA’s BWB. All three, though, employ hydrogen to meet the planet’s need to reduce or eliminate carbon dioxide and other emissions. All three use hydrogen hybrid power systems. The International Civil Aviation Organization (ICAO) in a 2019 report looked at the different electric and hybrid systems available. The organization included a factor examined before in this blog. “The climate benefits of electric aviation may come not only from its reduced CO2 emissions, but also from the elimination of contrails – the long, thin clouds that form in the wake of jet engines2. Although no scientific consensus exists on …