Learn what the Airbus ZEROe project is, how its hydrogen aircraft concepts work, why 2035 was not a firm launch date and what remains unresolved.
The Airbus ZEROe project is Airbus’s research and technology programme for a future hydrogen-powered commercial aircraft. Announced in 2020, it studies liquid-hydrogen storage, fuel-cell electric propulsion, hydrogen combustion and the airport infrastructure needed to support them. ZEROe is a development programme, not a certified aircraft type or a model passengers can book.
For our Aviation & Real-World Flying readers, the key distinction is that ZEROe is an umbrella project covering several technologies and aircraft configurations. It is not the name of one finished aeroplane with fixed performance figures.
What does the Airbus ZEROe project include?
ZEROe combines aircraft concept design with work on cryogenic tanks, propulsion, electrical distribution, thermal management, certification and hydrogen handling at airports.
Airbus initially presented three concept aircraft in 2020:
- Turboprop concept: up to about 100 passengers and a stated range beyond 1,000 nautical miles, intended for shorter regional routes.
- Turbofan concept: approximately 120 to 200 passengers and a stated range beyond 2,000 nautical miles, using modified gas-turbine engines.
- Blended-wing-body concept: up to about 200 passengers, with the broad fuselage providing more room for hydrogen storage and cabin layout changes.
These were trade-study concepts rather than announced production models. In 2025, Airbus showed a revised concept centred on a roughly 100-passenger, fuel-cell-electric aircraft for regional operations. This is why ZEROe should not be included among aircraft already offered to airlines; our guide to Airbus’s established commercial aircraft range covers those separately.
How would an Airbus ZEROe aircraft work?
A ZEROe aircraft could either convert hydrogen into electricity for electric motors or burn hydrogen in a modified gas turbine. Airbus has investigated both routes, although its later concept work placed greater emphasis on fuel-cell-electric propulsion.
| Propulsion route | Energy path | Direct output | Main engineering difficulty |
|---|---|---|---|
| Fuel-cell electric | Hydrogen and oxygen produce electricity, which powers motors and propellers | Water and heat, with no propulsion CO2 | Fuel-cell mass, cooling and high-power electrical distribution |
| Hydrogen combustion | Hydrogen burns in a modified gas turbine | Water vapour and no carbon-derived CO2 from the fuel, although nitrogen oxides can form | Combustion control, emissions, engine integration and bulky tanks |
A propulsive fuel-cell installation should not be confused with an ordinary auxiliary power unit. Our explanation of how an aircraft APU supplies onboard power shows the difference: ZEROe’s proposed fuel cells would have to generate enough power for propulsion as well as aircraft systems.
Why does liquid hydrogen change the aircraft design?
Liquid hydrogen must be stored near −253°C in heavily insulated cryogenic tanks, and it occupies substantially more volume than kerosene for the same usable energy. Conventional airliners store much of their fuel inside the wings; hydrogen tanks are more likely to require large cylindrical or similarly pressure-efficient spaces within or behind the fuselage.
That affects the cabin, centre of gravity, structural weight, evacuation arrangements and airport turnaround procedure. Producing hydrogen is only one part of the problem: airports also need suitable storage, transfer, venting, leak detection and emergency procedures.
Is Airbus ZEROe genuinely zero-emission?
ZEROe expresses Airbus’s zero-emission ambition, but it does not mean every part of a hydrogen aircraft’s life cycle has no environmental impact.
- Fuel production matters: hydrogen made using fossil energy can retain a substantial carbon footprint, while low-carbon hydrogen requires large amounts of clean electricity.
- Liquefaction and transport consume energy: hydrogen must be cooled, stored and delivered before it reaches the aircraft.
- Atmospheric effects remain: both propulsion routes produce water, and hydrogen combustion can create nitrogen oxides. Their climate effects depend partly on altitude and operating conditions.
- Manufacturing still has emissions: the aircraft, tanks, fuel cells and airport equipment all require materials and energy.
For that reason, “no propulsion CO2 at the point of use” is often the more precise description. The full benefit depends on how the hydrogen and electricity are produced.
Does an Airbus ZEROe aircraft already exist?
No ZEROe airliner is certified or operating in airline service. Airbus has built and tested relevant subsystems, but the published aircraft remain concepts whose configuration, capacity and performance can change.
The original programme presented 2035 as an ambition for introducing a hydrogen-powered commercial aircraft. Airbus’s revised 2025 roadmap described possible service entry in the second half of the 2030s, so 2035 should not be treated as a confirmed launch date.
Before an airline-ready aircraft can appear, Airbus must select and freeze a configuration, demonstrate the propulsion and tank systems, complete flight testing, obtain certification and rely on airports having an adequate hydrogen supply. Weak infrastructure or insufficient low-carbon hydrogen could delay adoption even if the aeroplane itself is technically ready.
Can you fly Airbus ZEROe in a flight simulator?
A ZEROe simulator add-on can only be a developer’s interpretation because no certified aerodynamic, cockpit or performance package is publicly available. Flight models, hydrogen consumption, tank mass, motor response and energy-management pages are therefore speculative rather than training-grade representations.
A common mistake is to give a concept aircraft ordinary kerosene-airliner performance and simply rename the fuel system. Accurate simulation would require modelling the changing centre of gravity, cryogenic fuel quantity, electrical load, thermal limits and propulsion response; our overview of how simulators represent aircraft systems and flight behaviour explains why missing engineering data matters.