Really interesting, but how does hydrogen compare to Sustainable Aviation Fuel Hydrogen turbines will still produce NOx and Steam (a greenhouse gas at high altitude). It also has a low volumetric energy density, meaning huge tanks for aircraft, and hydrogen production and transport is highly inefficient and expensive.

The European aircraft manufacturer is partnering with aero-engine CFM International, a well-established joint venture between GE Aviation and Safran Aircraft Engines, to provide the first engine for the program. Airbus will test a hydrogen combustion engine on an A380 as part of its ZeroE program before the end of this decade. CFM is modifying a GE Passport turbofan engine to consume hydrogen for the program, while Airbus is configuring the MSN1 A380, the first produced A380, to carry the engine on a support in the upper right rear of its fuselage.