Alaska Airlines presented a Bombardier Q400 regional turboprop to ZeroAvia that will be retrofitted with a hydrogen-electric propulsion system in an effort to expand the reach and applicability of zero emissions flight technology.

At an event, held at ZeroAvia’s Paine Field research and development site, the companies were joined by high school students from Raisbeck Aviation High School, Washington StateGovernor Jay Inslee, Congresswoman Suzan DelBene and Snohomish County Executive Dave Somers to participate in the formal handover of the 76-seat Q400 aircraft that will be developed by ZeroAvia, the U.S.-headquartered leader in designing and building zero-emission, hydrogen-electric aircraft propulsion systems for aircraft.

When Alaska Airlines’ regional carrier Horizon Air retired its Q400 fleet, it reserved one of the aircraft for research and development purposes to further advance zero emissions technology for the aviation industry. The aircraft was repainted with a special livery to highlight the innovative mission of this partnership.

ZeroAvia also debuted its breakthrough multi-megawatt modular electric motor system in a 1.8MW prototype configuration at the event – demonstrated with a propeller spin aboard the ZeroAvia’s 15-ton HyperTruck ground-test rig. Combined with higher temperature PEM fuel cells and advanced power electronics – both technologies that ZeroAvia is developing in-house – the leading-edge electric motor technology is one of three key building blocks for enabling commercially-relevant hydrogen fuel cell engines for larger aircraft. 

Aligning ZeroAvia’s powertrain with the Dash 8-400 airframe will represent a commercially viable zero-emission aircraft with fuel cell engine technology around five times more powerful than what has been demonstrated anywhere to date. 

ZeroAvia’s recent advancements clear the way for a potential flight of the Q400, also recognized as the Dash 8-400, but also demonstrate rapid progress toward certification of the ZA2000 propulsion system. ZeroAvia has already demonstrated a track-record of world-first flight testing. In January, ZeroAvia flew a retrofitted 19-seat aircraft with its prototype 600kW hydrogen-electric engine (ZA600). This followed the demonstration flight of a 250kW system in 2020, which at the time of flight was the world’s largest aircraft flown using a novel zero-emission power source.

ZeroAvia’s hydrogen-electric engine uses fuel cells to generate electricity from hydrogen fuel, before using that electricity to power electric motors which turn the aircraft propellers. The certifiable ZA2000 system will include ZeroAvia’s High Temperature PEM fuel cells and liquid hydrogen fuel storage, integral to delivering the necessary energy density for commercial operations of large regional turboprops. The company has already established an engineering partnership with De Havilland of Canada, the original manufacturer of the Dash 8 family of aircraft to enable exchange of data and expertise with the airframe.

In 2021, Alaska Airlines launched a partnership and invested in ZeroAvia to support the development of zero emissions propulsion technology for regional aircraft. As the fifth largest U.S. airline with a large regional network, Alaska has a unique opportunity to support the development of zero-emissions propulsion technology for regional aircraft. By establishing the viability of regional-sized aircraft, both companies will help advance zero-emissions technology across the industry.

HyperCore Motor
The 1.8MW motor configuration demonstrated consists of two “HyperCore” motor modules, each a high-power, high-speed 900kW permanent magnet radial flux machine which operates at 20,000 rpm, matching the typical turbine engine power turbine speeds, providing an unprecedented 15kW/kg motor power density. Crucially, HyperCore’s modular design enables the technology to address applications ranging from 900kW up to 5.4MW, meeting a number of regional turbo-prop and regional jet requirements. The HyperCores were successfully integrated with the stock Dash 8-400 engine gearbox and propeller, which dramatically simplifies integration into the aircraft as a replacement for a stock turbine engine.

The development and testing program will enable the understanding and measurement of system dynamics, calibration of physical and electrical models, and validation of thermal management systems. The company is concurrently developing world-class silicone-carbide power electronics and the matching hydrogen fuel cell systems, which convert hydrogen to electricity, powering the electric propulsion system. These systems will be brought together to create the full hydrogen-electric propulsion system, tested on the ground and then in the air.